Glabellula

Key to species of Tertiary amber Glabellula

1. Wing with stump vein into cell bm+dm eminating from crossvein bm-cu+dm-cu (cf. Fig. 10)......................... 2

-. Wing without such a stump vein.......................................................................... 4

2. Abominal tergites with yellow posterolaterally (Rovno)................................ G. perkovskyi Evenhuis, n. sp.

-. Abdominal tergites all black laterally...................................................................... 3

3. Antennal first flagellomere subconical, second flagellomere long, slightly less than half length of first flagellomere (cf. Fig. 6) (Baltic Region)...................................................................... G. electrica (Hennig)

-. Antennal first flagellomere round, second flagellomere short, less than one-third length of first flagellomere (cf. Fig. 7) (Dominican Republic)................................................................. G. grimaldii Evenhuis

4. Antennal first flagellomere subconical, second flagellomere long, slightly less than half the length of the first flagellomere (cf. Fig. 6) (Saxon Region)............................................................. G. hannemanni Schumann

-. Antennal flagellomere spherical to elliptical, not subconical (Figs. 5, 8), second flagellomere shorter than above.......... 5

5. Antennal first flagellomere elliptical (cf. Fig. 5) (Dominican Republic)........................ G. brunnifrons Evenhuis

-. Antennal flagellomere spherical, not elliptical (cf. Fig. 8).................................................... 6

6. Costa ends just after end of vein R4+5; abdominal tergites black (Dominican Republic)................ G. kuehnei Schlüter

-. Costa ends near midpoint between ends of veins R4+5 and M1; abdominal tergites with yellow laterally (Rovno)......................................................................................... G. aggregata Evenhuis, n. sp.