o80 
C. II. TYLEK TOWNSEND. 
This ^enus agrees in many ways, es|)ecially in the cliaracters of 
the head, with Hypertrophocera. But the aj)ical cell ends very little 
before the wing’s tip, and is petiolate ; the abdomen is narrow and 
conical ; and the sjiecies are of very small size. 
(‘Oiiica n. sp. 9 {?).— Small, black. Eyes brownish; 
front ami face black, silvery; frontal vitta narrow, rich dark brown, with a nar- 
row prong behind on each side of ocelli ; cheeks light reddish brown, forward 
border silvery ; anteniiffi brownish, first two joints and basal portion of third 
liclit l)rownish yellow, arista brown; proboscis light brownish, palpi pale yel- 
low : occiput black, soinewbat cinereous, with a fringe of short black bristles 
on orbital margins. Thorax, scutelluin, humeri and pleurae black, with a slight 
bluish cast, black hairy and bristly, sparsely silvery pollinose. Abdomen black, 
shilling, clothed with short black bristles, bases of segments faintly silvery 
l»olliiio.se ; first and second segments each with a median pair of inacrochaetae ; 
third and fourth segments each with a single lateral macrochaeta and a median 
pair: some longer bristles on sides of first two segments, which may often re- 
semble macrochaetse. Legs brownish, femora orange-yellow, tibiae, tinged with 
.same color; femora and tibiae with a few bristles; tibiae blackish, claws and pul- 
villi slightly elongate. Wings grayish hyaline, costal border and extreme base 
yellowish, veins light ; tegulae whitish, halteres light brownish. Length 4.5 mm. ; 
of wing 3.5 mm. 
Described from one specimen received from Mr. Chas. Robertson. 
Carlinville, 111. 
■.leiiCOMtoiilit. ittra n. sp. 'J, . — Black, shining. Head a little wider than 
thorax. Eyes brown, bare, extending nearly as low as the epistoma; front not 
prominent, gently rounded in profile, from vertex to middle about one-fifth the 
width of head, nearly twice as wide at base of antenme, face still wider; face 
and cheeks silvery white, front silvery shading to darker at vertex; frontal 
vitta velvet black or brownish black, rather narrow, expanded at each end; 
frontal bristles descending only to base of antennse, all equal in strength and 
hight even to the pair at the vertical angles, nearly erect, mostly curved inward 
and decussate, with some fine hairs outside them ; the usual two pairs of ocellar 
bristles, the front pair curved outward, not forward; no orbital bristles; sides 
of face narrow, bare, facial depression wide, face nearly straight, epistoma hardly 
prominent ; facial ridges bare, one or two short weak bristles outside the vibrissse 
and a little above; vibrissse decussate, inserted a good distance above the oral 
margin ; cheeks invaded by occipital area under the eyes, which is cinereous and 
black hairy, with bristles on lower and front margins; antennae short, reaching 
a little more than half way to oral margin, brownish, more or less silvery; first 
joint short, second and third about same length; second joint bristly before, 
lighter than third, which is blackish toward apex ; arista slender, slightly thick- 
ened on basal third, microscopically short pubescent, rather indistinctly jointed, 
brownish, lighter at base; jiroboscis about as long as higbt of head, moderately 
slim, black, with light brown well developed labella : palpi slender, a little 
thickened at tip, flavous, with some bristles on underside ; occijiut cinereous, black 
hairy, with a fringe of black hairs on orbital margins. Thorax and .scutelluin 
shining black, with a bluish luster, hairv and bristly; scutelluin with an aiucal. 
