Xevioso Lehtinen 1967

Key to the species of Xevioso (modified from Griswold 1990)

Note: figures denoted ‘*fig.’ refer to figures in Griswold (1990).

1. Males ................................................................................................................................................. 2 – Females ........................................................................................................................................... 12

2. Metatarsus I without dorsomedian projection .................................................................................. 3 – Metatarsus I with dorsomedian projection (*figs 33, 44) ................................................................. 5

3. Tegulum (*fig. 34a) divided into basal lobe and projecting TA3; TA 1 present; apex of EBS simple ............................................................................................................. X. orthomeles Griswold, 1990 – Tegulum (*fig. 46a) simple, without basal lobe, TA3 not protruding; TA1 absent; apex of EBS tripartite ............................................................................................................................................. 4

4. Modification of Mt I subtle, hardly discernable (Fig. 4D); TA3 with two sharp prongs (Figs 1 C–D, 3A–B), dorsal apophysis of palpal tibia axe-shaped, delimiting rounded invagination with narrow opening (Figs 1C, 3 B–C, 4A) .................................................................................... X. cepfi sp. nov.

– Mt I clearly narrowed in center (Fig. 4E); TA3 with blunt prongs; dorsal apophysis of palpal tibia sinuous, delimiting oval invagination with broad opening (Fig. 4B) ....... X. jocquei Griswold, 1990

5. Tegulum (Figs 6D, 7A) simple, without basal lobe, TA3 not protruding; apex of EBS tripartite): apophysis of palpal tibia sinuous (Figs 4C, 7 B–C) delimiting oval invagination with broad opening ................................................................................................................. X. megcummingae sp. nov. – Tegulum (*fig. 34a) divided into basal lobe and projecting TA3 .................................................... 6

6. Palpal tibia with no more than 1 elongate apical process, DA unmodified; embolic spiral much narrower than width of cymbium; conductor without hook; metatarsus I with 1 distinct dorsal process .............................................................................................................................................. 7

– Palpal tibia with 2 widely separated processes (*fig. 37b): an elongate DA and acutely pointed median D process; embolus a broad spiral covering width of cymbium (*fig. 37a); conductor with proximal median hook; metatarsus I with 2 distinct dorsal processes (*fig. 33a) .............................. .............................................................................................................. X. zuluana (Lawrence, 1939)

7. Metatarsus I with an acute dorsal spur (*fig. 40a–d); palpal tibia with DAS produced into a long, sharp point (*fig. 41b); embolus making less than 1 full turn ......................................................... 8

– Metatarsus I dorsal projection broad and triangular; palpal tibia with DA rounded and unmodified (*fig. 29c); embolus making more than 1 full turn (*fig. 29b) ......................................................... 9

8. Palpal tibia with hyaline D reduced to a vestige or lost, DAS extending far beyond margin of hyaline D (*fig. 39b); TA3a very long, pointed (*fig. 39c); TA 1 present, slender; proximal margin of conductor transverse, unmodified (*fig. 39a); metatarsus I with fine spinules ....... X. aululata Griswold, 1990

– Palpal tibia with hyaline D extending for full length of DA, reaching apex of DAS; TA3a short, conical (*fig. 41c); TA1 absent; proximal margin of conductor with an acute, proximad-directed flange (*fig. 41a); metatarsus I with stout spinules ................................ X. colobata Griswold, 1990

9. Palpal tibia with hyaline D broad, margin gently curved or angled (*fig. 45b); apex of EBS bifid (*fig. 42a); embolus with lamella for much of length (*fig. 45a); TAI slender and elongate (*fig. 42c) ....................................................................................................................................... 10

– Palpal tibia with hyaline D having a slender median flange (Df) projecting distally (*figs 29c, 32b); apex of EBS simple (*fig. 29b); embolus with lamella only at base; TA 1 broad (*figs 29e, 32a) ...11

10. Conductor with acute proximal flange (*fig. 45c); palpal tibia with hyaline D angled (*fig. 45b) .... .................................................................................................................... X. kulufa Griswold, 1990 – Conductor without proximal projection (*fig. 42c); palpal tibia with hyaline D evenly curved (*fig. 42b) .......................................................................................... X. lichmadina Griswold, 1990

11. Tegulum with TA3a broad, short, conical, apex bifid (*figs 32a, c) ................................................... ........................................................................................................ X. tuberculata (Lawrence, 1939)

– Tegulum with TA3a narrow, elongate, apex acutely pointed (*figs 36a, c) ........................................ ..................................................................................................................... X. amica Griswold, 1990

12. Ratio of PML length to width greater than 1 .................................................................................. 13 – Ratio of PML length to width less than 1 ....................................................................................... 14

13. Ratio of PML length to width greater than 2 (*fig. 43a) ................... X. lichmadina Griswold, 1990 – Ratio of PML length to width less than 2 (*fig. 43b) ................................ X. kulufa Griswold, 1990

14. Epigynum simple, without paired lobes or secondary depressions; copulatory duct small, straight or curved and horn shaped .................................................................................................................. 15

– Epigynum with paired raised median lobes and shallow paired anterior depressions; copulatory duct very large, spherical, length nearly equal to that of spermathecal capsule (*fig. 38b) ....................... .............................................................................................................. X. zuluana (Lawrence, 1939)

15. Epigynum flat to convex, with lateral margins of PML curved outward posteriorly; spermathecae with spiral duct ............................................................................................................................... 16

– Epigynum with transverse median ridge, lateral margins of PML straight; spermathecae with simple spherical chamber (*figs 12d, 38c) ......................................................... X. aulutata Griswold, 1990

16. Copulatory duct large, hornlike, expanded proximally .................................................................. 17 – Copulatory duct small, ringlike ...................................................................................................... 19

17. Diameter of copulatory duct much greater than that of spiral spermathecal chamber (*fig. 35e) ...... ..................................................................................................................... X. amica Griswold, 1990 – Diameter of copulatory duct about equal to that of spiral spermathecal chamber ......................... 18

18. Spiral spermathecal chamber almost touching medially with anterior bulbus spherical spermathecae (Fig. 6 F–G). CO far apart ....................................................................... X. megcummingae sp. nov.

– Spiral spermathecal chamber not close to touching medially, without bulbus spherical spermathecae head (*fig. 35d) ................................................................................... X. orthomeles Griswold, 1990

19. Spermathecal chamber with 4-5 turns, copulatory duct small and thin (*fig.39f) ............................. ........................................................................................................ X. tuberculata (Lawrence, 1939)

– Epigyne with copulatory opening with distinct sinuation posteriorly (Fig. 5A). Spermathecal chamber with 3 turns (Fig. 5C), copulatory duct expanding widely, wider than spermathecae (Fig. 5 B–C) ... .................................................................................................................................... X. cepfi sp. nov.