306 DIPTERA 
Characters. — Head globular, sometimes slightly longer than high, the occiput more or less 
hemispherical; eyes large, bare, at most with scattered microscopic hairs, the facets of uniform size, 
beneath the antennz the eyes of both sexes nearly touching, leaving the face linear or very narrow, 
above the eyes the front is V-shaped, always broader than the face, sometimes the front is quite narrow; 
three small ocelli present. Excision ofthe eyes at the level of the antenne very large; cheeks sometimes 
entirely obliterated, usually about one-eighth the height of the eye, with the oral margin obliquely 
descending posteriorly. Proboscis thick, rather sharply pointed, perpendicular or directed backward, 
averaging one-half the height of the head, its labrum with prominent base and as long as the labium ; 
palpi broadly oval, one-jointed, applied to the proboscis, the inside glabrous and shining, the outside 
pollinose and with more or less evident recumbent pubescence, generally tipped with a longer seta. 
Antennz inserted close together a little above the middle of the head, three-jointed, very rarely the basal 
joint is wanting, the second joint with a circle of small setulz, the bottom hair of which is sometimes 
long, the third joint compressed, varying from short oval, not longer than deep and with subterminal 
arista, to lanceolate or conical, nearly twice as long as deep and with terminal arista; the arista usually 
slender, nearly bare, two-jointed, its basal joint small, its outer joint two or three times as long as the 
antennes, rarely the hairy coating is dense and longer so as to give a thickened appearance to the arista. 
Occiput often with a pollinose band on the lower orbits including the cheeks excepting their lower 
margin, usually with sparse short hairs, typically a pair of ocellar and one of vertical bristles present, 
rarely two or three pairs of vertical and an additional pair of post-vertical bristles present, sometimes an 
oral bristle on the back part of the cheeks. E 
Thorax robust, polished, nearly bare to pubescent, dorsocentral bristles usually limited to a pair 
of prescutellars, humeral and posthumeral bristles present or absent, notopleural bristles present but 
variable, scutellum with two or four marginal bristles, the lateral ones always shorter; pleurz bare, 
rarely with pollinose streaks following the sutures. Abdomen with eight segments, the first segment 
laterally inflated, the fourth segment usually large and more heavily chitinized than the others, its sides 
often pollinose and bearing scimiter-shaped, glistening setulze, the fifth segment short: pygidium varying 
from small to large, closed to widely open, asymmetrical, the right side usually with a broad, curved, 
furcate valve. Legs rather stout, the front femora a little the strongest, usually the anterior femora 
with a basal flexor hair and with a preapical bristle on the outer side, the hind femora with one to three 
preapical bristles on the anterior face, hind tibize with extensor bristles and more or less produced as an 
apical tooth-like spur, the anterior tibize with a pair of apical bristles ; sometimes the legs are devoid 
of all bristles; pulvilli broad; in those species with broad tibial spur the inside of the hind metatarsi 
and of the end of the hind tibiz spongy pubescent. 
Wings with anal angle more or less developed, except very rarely the first basal cell shorter than 
the second which is always fused with the discal cell, ive simple longitudinal veins, anal cell completely 
wanting, at most a short trace of the anal vein present toward the hind margin but the anal crossvein 
always lacking, usually the entire margin of the wing uniformly short-ciliate, sometimes the hairs of the 
first section of the costa ate longer, no stigma and no definite color pattern. 
The species of Drafetis are included in the following subgenera : 
I. SuBGENUS DRAPETIS, MEIGEN, S. STR. 
Type species : Dr. exilis, Meigen. Rather small, bristleless, black species, with short antennce 
directed somewhat upward, the second joint without a conspicuous seta beneath, the third joint oval, 
with long, subterminal arista; legs without strong bristles, the hind tibiz without the terminal spur; 
notum densely short-pubescent, the hairs appressed, no humeral or discal bristles; wings broad, costa 
short-pubescent, third vein sometimes curved forward ; halteres usually black. 
