168 
13. 
14. 
15. 
16. 
17. 
18. 
19. 
DIPTERA. 
Thorax thickly clothed with yellowish pile . 
. Antenne rufous; abdomen pale yellow (macrochzetz very weak 
and short) . 
Antennez black; abdomen cinereous . 
. Frontal band black . 
Frontal band rufous 
. Macrocheetze of the abdomen very short, inconspicuous among 
the dense pilosity. . . woe eee 
Macrocheetz of the abdomen always distinct 
. Hind tibiz outwardly fringed with bristles of equal length . 
Hind tibia outwardly with a row of bristles, among which a 
longer one appears below the middle . 
Abdomen with discal and marginal macrochete . 
Abdomen with marginal macrochetz only . 
. Small cross-vein on the middle or nearly on the middle of the 
discal cell . . . . 
Small cross-vein distinctly before the middle of the discal cell. 
. Thorax black, not striped 
Thorax with more or less distinct stripes . 
. Apical cross-vein nearly straight ; posterior cross-vein concave . 
Apical cross-vein concave ; posterior cross-vein straight . 
. Thoracic stripes, at least the outer ones, prolonged behind the 
transverse suture; larger species (7°5 millim. or more) . 
Thoracic stripes only conspicuous before the transverse suture ; 
smaller species (6 millim. or less) 
Head ochraceous; anusrufous. . ... . Lo 
Head silvery-white; anus black 2 8 ww 
Thorax with three stripes (the two intermediate stripes being 
united to a broad black band) 
Thorax with four stripes . 
Wings brownish er 
Wings hyaline or nearly hyaline Loe woe ee 
Abdomen laterally yellowish and somewhat transparent . 
Abdomen without any yellow coloration . woe 
The white front borders of the abdominal segments interrupted 
by a black dorsal stripe oe . 
The white front borders of the abdominal segments not inter- 
rupted by a black dorsal stripe . . . 
Dorsal macrochetz of the anal segment much shorter than 
those of the preceding segments (only some longer ones at 
the tip and beneath) . . . ee 
Dorsal macrochetze of the anal segment as long as those of the 
preceding segments . . 
Posterior cross-vein nearly straight 
Posterior cross-vein distinctly curved . 
5. 
adscripta, v.d. Wulp. / 70 
disgrega, v.d. Wulp. /7 | 
relicta, v.d. Wulp. ) 7 | 
rufostriata, v.d. Wulp. ; 7 
7. 
8. 
fimbricrura, v. d. Wulp. ) 77 
connexa, v. d. Wulp. / 7 % 
9. 
30. 
10. 
20. 
11. 
12. 
humeralis, v. d. Wulp. 
hamata, v. d. Wulp. 
79 
{2% 
138. 
14. 
pollens, v. d. Wulp. 
forticula, v. d. Wulp. 
iid 
174 
trifurca, v. d. Wulp. | 75~ 
15. 
rasilis, v. d. Wulp. 
16. © 
vaciva, v. d. Wulp. } 7 & 
17. 
17 S~ 
18. 
19. 
dissepta, v.d. Wulp. / ? L 
recondita, v.d. Wulp. /? 
comata, v. d. Wulp. 195 
curva, v. d. Wulp. 74 
