DIPTERA. 245 P 
Genus ERISTALIS, Latreille. 
ERisratis rLortpus, Mas. 
Ater, thovace vittis quatuor cyaneo-cinereis ornato, abdomine maculis sex 
Serrugineis cyaneo-cinereo ornatis, segmentorum 2i, 3i et 4i margini- 
bus posticis flavis, antennis rufis, pedibus nigris, femoribus posticis 
erassis, alis subcinereis nigro maculatis vel fasciatis. 
Black: head tinged with gray, clothed with pale hairs; face adorned 
with a pale buff tinge ; tubercle of the eyelets black and clothed with black 
hairs: eyes red, thickly clothed with short black hairs: mouth black: feel- 
ers red: chest deep black, clothed with black hairs, adorned with four bluish- 
gray stripes; sides clothed with pale buff hairs; hinder border of the 
seutcheon dark ferruginous : breast tinged with gray: abdomen obconical, 
shining, not longer than the chest, clothed with hoary hairs, and on each 
side towards the base with short black hairs, adorned with three pairs of 
large dark ferruginous spots which ave overspread with bluish gray bloom ; 
hind borders of second, third, and fourth segments pale yellow : legs clothed 
with short black hairs; knees ferruginous; shanks and feet covered be- 
neath with ferruginous down; claws tawny towards the base; foot- 
cushions tawny ; hind-thighs thick; hind-shanks curved: wings slightly 
gray ; a small blackish spot beneath the middle of the fore border, sometimes 
extending across the wing ; wing-ribs pitchy ; veins black, pitchy at the 
base; alule slightly tinged with gray, their borders pitchy and fringed 
with white hairs ; puisers tawny. Length of the body 4—44 lines ; of the 
wings 8—9 lines. 
Brazil. 
ErisTatis soLennis, Mas. 
Niger, capite scutello abdomineque fulvis, hujus vitta apiceque nigris, an- 
tennis rufis, pedibus nigris, tibiis piceis basi flavis, tibiis intermediis 
fulvis, alis sublimpidis ad costam subfulvis.’ 
Head tawny, clothed with pale yellow hairs, ferruginous above the 
feelers where the hairs are black; face convex in the middle along most 
part of the length: eyes red; facets above larger than those elsewhere : 
sucker pitchy: feelers red: chest and breast black, clothed with tawny 
2k 
