DIPTERA. 129 
wards the tip with pale tawny hairs; siath segment yellowish brown, with a 
yellow hind border ; seventh tawny ; tip and appendages ferruginous, shin- 
ing, beset beneath with a few black bristles: legs back, beset with black 
hairs and bristles ; shanks tawny, with black tips ; foot-cushions pitchy : 
wings dark brown; wing-ribs and veins black; angle of the vein between 
the submarginal areolets much rounded, with no stump ; poisers pale yel- 
low. Length of the body 9 lines ; of the wings 16 lines. 
South America. 
Erax Srimicon, Fem. 
Ferrugineus, thoracis disco abdomineque piceis, hujus segmentorum mar- 
ginibus posticis fulvis, antennis fulvis apice nigris, pedibus ferrugi- 
neis, alis limpidis. 
Head pale tawny, whitish and clothed with white hairs behind and 
beneath, armed behind the eyes with a few black and tawny spines ; a few 
white hairs and pale yellow bristles on each side of the crown; face very 
convex, beset with white hairs and pale yellow spines: eyes bronzed ; fore 
part nearly flat, its facets larger than those elsewhere: sucker black, clothed 
at the tip with short, pale tawny hairs; palpi dark tawny, beset with long, 
black bristles: feelers black ; first and second joints tawny, beset with short, 
black and pale yellow bristles ; second much shorter than the first ; third 
tawny at the base, tapering from near the base to the tip, as long as the 
first; bristle a little longer than the third joint: chest and breast ferrugi- 
nous, clothed here and there with a few short, black and hoary hairs ; disk 
of the chest almost pitchy ; sides and scutcheon armed with a few black 
spines ; breast with a hoary tinge: abdomen pitchy, about twice the length 
of the chest, clothed with short black and hoary hairs, slightly tapering 
from the base to the tip which is black and shining ; sides and hind borders 
of the segments tawny ; first segment tawny, armed on each side with three 
black spines: legs pale ferruginous, clothed with short hoary hairs, armed 
with black spines; knees black; claws black, dark tawny at the base ; foot- 
cushions pale tawny: wings colourless, rather short; wing-ribs and veins 
ferruginous, the latter black towards the tips; angle of the vein between 
the submarginal areolets very distinct, slightly obtuse, its stump much 
more than twice the length of its inner side ; Hotkey pale tawny. Length 
of the body 9 lines ; of the wings 13 lines. 
Columbia. 
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a I ee oy, ee ee ee ee er oe 
