268 
12. 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
20. 
21. 
23. 
24. 
27. 
DIPTERA. 
\ 
' 
7° 
Abdomen bluish-black; antennz elongate, with strongly plumose arista. x plumigera. 275 As S we 
Abdomen with cinereous and black reflecting spots; antenna normal . 
Abdomen cinereous, with more or less regular black markings 
Abdomen with the black colour predominating . 
Posterior cross-vein in the middle between the small cross-vein and 
the curvature of the fourth vein . ee 
Posterior cross-vein (as usual) much nearer to the curvature of the 
fourth vein cee ee ee 
Hind tibie (¢) with long hairs on the inner side 
Hind tibiz not hairy, with some bristles only . . - 
Anal segment reddish, as well as the hypopygium of the male, and 
differing in colour from the preceding segments . 
Anal segment concolorous with the preceding segments, the hypopygium 
only red . 
Head ochraceous 
Head grey or whitish. soe ee Lee ee 
Third abdominal segment with three or four lateral macrochetz on 
each side, placed at some distance from each other - oe 
Third abdominal segment with not more than two lateral macrochete, 
or if there are more present they are placed close together 
Vertex (¢) less than half the breadth of the eyes 
Vertex (¢) more than half the breadth of the eyes . . 
Third abdominal segment only with a lateral macrocheta on each side. 
Third abdominal segment with a pair of dorsal macrochete, in addition 
to the lateral ones . 
Inferior part of the cheeks equalling half the longitudinal diameter of 
the eyes . Dee 
Inferior part of the cheeks very short 
. Hypepygium (¢) cinereous, small, and but little prominent . 
Hypopygium () red, usually prominent . 
Palpi rufous . Soe oe 
Palpi black . . 
Median stripe of the thorax distinetly divided : into o three lines . 
Median stripe of the thorax broad, sometimes with a faint line on 
each side . 
. Head yellowish ; abdomen (3) conieal, cinereous, with brown reflecting 
spots . . 
Head whitish ; abdomen ¢ ovate, tessellated with black and ¢ grey . 
. Thoracic stripes confused and but little distinct . 
Thoracic stripes conspicuous as usual 
Abdomen () obconical . 
Abdomen ovate oe . . 
Median stripe of the thorax with a . distinct Tine on each side . 
Median stripe of the thorax without lateral lines . 
13. 
ventricosa. wy LSM 
14, 
diversinervis. 274 W—S mw 
Susctanalis. 27 Ss be) aw 
16. 
17. 
prevolans. “275° ‘T)S™w 
setulosa. cal 6 Cm 
18. : 
19. 
turbata. 27b ba mr’ 
trivialis, 274 5-8 
uncata. 277 b—-6 mm 
20. | 
errabunda. v7 S bmw 
21. 
pusiola. 27 $ £ S,Soyw 
debilis. 274 4ve™ 
Micropyga. 74 \0\S awn 
23. 
claripalpis. 290 4S aw 
24. 
25. 
26. 
sueta. 2%) QS ww 
tridens. 1-8) ") oor 
deleta, 28%  180~% 
27. 
tenuiventris, 28% & ™~~ 
oberrans. 2.8% 9 ww 
29. 
30. 
