Eucerini

Key for the Chilean species of Eucerini

1 Males........................................................................................................................................................................... 2

- Females....................................................................................................................................................................... 26

2 Gradulus of T6 produced as spine-like processes on each side.................................................................................. 3

- Gradulus of T6 not as above....................................................................................................................................... 8

3 F1 longer than F2; paraocular area yellow; clypeus uniformly yellow; labrum black; hind femur with a spine-like process at midlength; hind basitarsus strongly modified................................................................... Eucerinoda gayi

- F1 shorter than F2; paraocular area black; clypeus yellow with black spots; labrum yellow; hind legs unmodified 4

4 S6 without posteriorly convergent carinae................................................................................ Melissodes ecuadoria

- S6 with posteriorly convergent carinae...................................................................................................................... 5

5 Prestigma clearly longer than pterostigma....................................................................................... Svastra flavitarsis

- Prestigma almost as long as the pterostigma (genus Melissoptila)............................................................................ 6

6 Apex of F10 modified; F11 laterally compressed; middle and hind legs strongly modified. Melissoptila tandilensis

- F10 and F11 unmodified (uniformly cylindrical); middle and hind legs unmodified.................................................. 7

7 Clypeal disc relatively flat; ocellocular area with dense pilosity, covering the integument; terga with a apical translu- cent band very narrow or absent..................................................................................................... Melissoptila dama

- Clypeal disc uniformly convex; pilosity on ocellocular area not very dense, integument visible beneath hairs; terga with wide apical translucent band................................................................................................ Melissoptila chilena

8 S6 with posteriorly convergent carinae...................................................................................................................... 9

- S6 without posteriorly convergent carinae (genus Alloscirtetica)............................................................................ 11

9 Distal margin of the labrum uniformly rounded; antenna not reaching T2; mandible with subapical tooth................. ....................................................................................................................................................... Peponapis citrullina

- Distal margin of the labrum with a apical cavity; antenna reaching at least T3; mandibular apex without subapical tooth (genus Svastrides)............................................................................................................................................ 10

10 Basal half of clypeal disc black; T4 to T7 without white pilosity................................................ Svastrides melanura

- Clypeal disc completely yellow; T4 to T7 with lateral white pilosity .......................................... Svastrides orellanae

11 Clypeal disc yellow or at least with a small spot of that color................................................................................. 12

- Clypeus dark brown or black..................................................................................................................................... 22

12 Labrum with yellow areas......................................................................................................................................... 13

- Labrum black............................................................................................................................................................. 18

13 Labrum with yellow spot and black edges................................................................................................................. 14

- Labrum completely yellow........................................................................................................................................ 15

14 T2 to T5 with apical band of white pilosity, widely interrupted in the middle; rest of metasoma with black pilosity. ......................................................................................................................................... Alloscirtetica danuncia n. sp.

- T2 to T5 with uninterrupted apical band of white pilosity; rest of metasoma with whitish or yellowish pilosity............................................................................................................................................................. Alloscirtetica cinerea

15 Dorsal pilosity on mesosoma yellow or orange; terga with apical bands of yellow pilosity.. Alloscirtetica weyrauchi

- Dorsal pilosity on mesosoma greyish; metasoma without bands.............................................................................. 16

16 Dorsal pilosity on mesosoma greyish; anterior area of middle ocellus depressed as semicircle................................... ............................................................................................................................................. Alloscirtetica gelida n. sp.

- Dorsal pilosity on mesosoma whitish or yellowish; anterior area of middle ocellus depressed as triangle.............. 17

17 Terga with apical translucent bands; T2 to T7 with white and short pilosity............................. Alloscirtetica chilena

- Terga without apical translucent bands; T2 to T2 with black pilosity........................................ Alloscirtetica porteri

18 Clypeal disc covered by abundant white pilosity; labrum covered only with white pilosity ............ Alloscirtetica gayi

- Clypeal disc without hairs, pilosity only on the sides; labrum with black pilosity, if there are white hairs, they are scarce......................................................................................................................................................................... 19

19 Frontal area with black pilosity .............................................................................................. Alloscirtetica vagabunda

- Frontal area with white or yellowish pilosity............................................................................................................. 20

20 Frontal area and metasoma with yellow pilosity .......................................................................... Alloscirtetica herbsti

- Frontal area with white pilosity; metasoma with black and white hairs intermixed or forming apical bands on some

terga............................................................................................................................................................................. 21 21 Hind tibiae with white and branched pilosity .................................................................... Alloscirtetica valparadisaea

- Hind tibiae with dark brown and simple pilosity, if branched hairs, they are scarce .............. Alloscirtetica tristrigata

22 Head and legs with whitish or yellowish pilosity ...................................................................... Alloscirtetica frieseana

- Head and legs with dark brown or black pilosity....................................................................................................... 23

23 At least T3 and T4 covered by white and long hairs ..................................................................... Alloscirtetica lanosa

- At least T3 and T4 with black pilosity....................................................................................................................... 24

24 Clypeal disc with smooth longitudinal line ................................................................................ Alloscirtetica gazullai

- Clypeal disc without longitudinal line........................................................................................................................ 25

25 Gena with white pilosity; antennae orange brown ................................................................... Alloscirtetica antarctica

- Gena with dark brown pilosity; antennae dark brown or black ................................................. Alloscirtetica rufitarsis

26 Gradulus of S2 uniformly convex ........................................................................................................ Eucerinoda gayi

- Gradulus of S2 biconvex............................................................................................................................................. 27

27 Clypeus strongly protuberant; hind basitarsus with hairs of inner surface sparse, except for a narrow band of dense hairs near lower margin .................................................................................................................. Peponapis citrullina

- Clypeus not or little protuberant; hind basitarsus with uniform dense pilosity.......................................................... 28

28 Apical half of clypeus yellow............................................................................................................ Svastra flavitarsis

- Clypeus uniformly black............................................................................................................................................. 29

29 Sector of vein r on margin of 2nd submarginal cell shorter than vein 1°rm (genus Alloscirtetica)............................. 35

- Sector of vein r on margin of 2nd submarginal cell longer or equal in length to vein 1°rm........................................ 30

30 Tibial scopa black (genus Svastrides)......................................................................................................................... 31

- Tibial scopa yellow..................................................................................................................................................... 32

31 T3 with basal band of white pilosity; T4 without white pilosity................................................... Svastrides melanura

- T3 without band of white pilosity; T4 with a tuft of white pilosity on each side........................ Svastrides orellanae

32 Prestigma clearly longer than the pterostigma; metasoma with black pilosity and basal bands of yellow hairs.......... ..................................................................................................................................................... Melissodes ecuadoria

- Prestigma and pterostigma similar in length; metasoma with black pilosity and with bands of white pilosity or com- pletely covered with yellow pilosity (genus Melissoptila)........................................................................................ 33

33 Metasoma with black pilosity and white bands from T1 to T4, widely interrupted on T1 and T2................................................................................................................................................................................ Melissoptila tandilensis

- Metasoma covered with yellow pilosity................................................................................................................... 34

34 Base of mandible yellow; tegula and veins yellowish brown......................................................... Melissoptila dama

- base of mandible mahogany; tegula and veins dark brown......................................................... Melissoptila chilena

35 Mesosoma completely covered by dark brown or black pilosity.............................................................................. 36

- mesosoma with black pilosity only on mesepisternum or absent.............................................................................. 39

36 Pronotal lobe with white pilosity; mesoscutum with light brown pilosity........................... Alloscirtetica vagabunda

- Pronotal lobe with black pilosity; mesoscutum with dark brown or black pilosity.................................................... 37

37 F2 to F9 black; basis of middle tibiae with tuft of white pilosity.................................................... Alloscirtetica gayi

- F2 to F9 orange; middle tibiae completely covered with dark brown or black pilosity........................................... 38

38 Apex of pygidial plate acute; tegulae light brown, almost translucent....................................... Alloscirtetica porteri

- Apex of pygidial plate broadly rounded; tegulae dark brown ...................................................... Alloscirtetica chilena

39 Mesosoma with dorsal pilosity yellowish or orange................................................................................................ 40

- Mesosoma with dorsal pilosity white, brown or gray, at least dorsally.................................................................... 43

40 Head, mesepisternum, legs and metasoma, except T1 with black pilosity............................ Alloscirtetica antarctica

- Head, mesepisternum, legs and metasoma with whitish or yellowish pilosity.......................................................... 41

41 Base of mandible yellow .............................................................................................................. Alloscirtetica herbsti

- Base of mandible dark brown or black......................................................................................................................42

42 Tibial scopa with simple and yellowish pilosity......................................................................... Alloscirtetica cinerea

- Tibial scopa with branched and dark brown pilosity............................................................. Alloscirtetica weyrauchi

43 Tibial scopa with yellowish/ light brown pilosity ............................................................... Alloscirtetica gelida n. sp.

- Tibial scopa with dark brown pilosity...................................................................................................................... 44

44 T2 to T4 with apical band of white pilosity (complete or interrupted in the middle of T2....................................... 45

- T2 to T4 without apical band of white pilosity.......................................................................................................... 46

45 Frontal area with white pilosity; T2 with apical band of white pilosity uninterrupted .......... Alloscirtetica tristrigata

- Frontal area with dark brown or black pilosity, T2 with apical band of white pilosity widely interrupted in the middle ................................................................................................................................................... Alloscirtetica frieseana

46 Mesepisternum with black pilosity............................................................................................................................ 47

- Mesepisternum with white pilosity............................................................................................................................ 48

47 T2 completely covered by white pilosity................................................................................... Alloscirtetica gazullai

- T2 pilosity with black, if white hairs, they are scarce and located only at the basis of terga .... Alloscirtetica rufitarsis

48 T2 to T6 with dark brown or black pilosity; apex of tibial spurs strongly curved ....................... Alloscirtetica lanosa

- T2 to T6 mostly with white pilosity, with some black hairs intermixed; apex of tibial spurs almost straight............... ........................................................................................................................................... Alloscirtetica valparadisaea