10. 
ll. 
12. 
13. 
14. 
15. 
16. 
17. 
. Abdomen laterally yellow; 
DIDYMA. 
Abdomen with long discal and marginal macrochete . 
Abdomen only with short marginal macrochzete . 
- Head yellowish or ochraceous . 
Head blackish, whitish, or grey . 
. The black frontal band as broad as the lateral ‘portions ; ; 
thorax blackish . : os ew ee 
The black frontal band narrower +» than the lateral portions ; 
thorax cinereous 
. Macrochetz of the abdomen long . .... . 
Macrocheetze of the abdomen short 
. The black thoracic stripes indistinct; base of the wings 
infuscated . . 
The black thoracic stripes distinct wings wholly hyaline. 
. Abdomen with discal and marginal macrochete . 
Abdomen with marginal macrochetz only . 
. Posterior cross-vein in the middle between the small cross- 
vein and the curvation of the fourth vein 
Posterior cross-vein nearer to the curvation of the fourth 
vein re 
third vein distinctly curved 
upward before its end . oe ee ww 
Abdomen without yellow coloration; third vein nearly 
straight er 
Palpi black . . . 2. 2. 2. 2 ew ee 
Palpi rufous . 2 . soe . 
Thoracic stripes very distinct before the transverse suture ; 
macrochetz long; larger species (7°5 millim.). 
Thoracic stripes indistinct; macrochetze short; smaller 
species (5-5°5 millim.) an 
Small cross-vein infuscated ; apical cross-vein curved . 
Small cross-vein not infuscated; apical cross-vein nearly 
straight . oe 
Macrochete of the abdomen short ~ oe ee 
Macrochetz of the abdomen long 
-Palpi black . 
Palpi rufous 
Hind tibiz outwardly nearly fringe-like with bristles 
Hind tibize outwardly with bristles of unequal length 
Venation of the wings strong . 
Venation of the wings thin. . 
Anal segment unicolorous shining black 
Anal segment with a whitish front border . 
157 
mesta, v. d. Wulp. 
nigricolor, v. d. Wulp. 
4. 
7. 
6. 
ambulatriz, v. d. Wulp. 
otiosa, v. d. Wulp. 
basilaris, v. d. Wulp. 
modesta, v. d. Wulp. 
8. 
13. 
9. 
10. 
exigua,v.d. Wulp. We. Coq. 
timida, v.d. Wulp. #9 .C,> Coq. 
11. 
12. 
vagabunda, v. d. Wulp. 
prompta, v. d. Wulp. 
pullula, v. d. Wulp. 
albomicans, v. d. Wulp. 
inconspicua, v.d. Wulp. +f£a- Coq. 
14. 
15. 
16. 
commizta, v. d. Wulp. 
. fuliginipennis, v. d. Wulp. 
validinervis, v. d. Wulp. 
17. 
pavida, v. d. Wulp. 
volucris, v. d. Wulp. 
