DIPTERA 127 
Genus ERAX, Macquart. 
Erax Parpnorvus. 
Fulvus, thoracis vittis quatuor abdomineque nigris, hujus segmentorum 
marginibus posticis ventreque cinereis, antennis pedibusque nigris, 
alis subcinereis. 
Head adorned with a tawny covering, which has a silky lustre, beset 
behind the eyes with black bristles, thickly clothed beneath with tawny 
hairs ; a few black hairs and bristles on the crown; face very prominent, 
thickly beset with long, stout, black bristles: eyes bronzed; a small por- 
tion of the fore part nearly flat, composed of large facets: sucker black, 
clothed at the tip with tawny hairs: palpi black, beset with long black 
bristles: feelers black; first and second joints beset with black bristles; 
third oval, longer than the second , bristle hardly widened at the tip, about 
thrice the length of the third joint; chest adorned with a dark tawny 
covering, beset on each side and at the tip with a few black bristles, having 
four black stripes, of which the middle pair are straight and entire, the side 
pair irregular and interrupted: breast pale grayish tawny: abdomen black, 
tapering from the base to the tip, about twice? the length of the chest, 
thinly clothed on each side with whitish hairs ; hind borders of the segments 
and under side gray: legs black, clothed with black hairs and bristles ; 
foot-cushions dark tawny: wings pale brown; wing-ribs and veins black ; 
stump on the vein between the submarginal areolets about thrice the length 
of the inner side of the angle whence it springs; poisers tawny. Length 
of the body 11 ? lines; of the wings 16 lines. 
Columbia. 
Erax Myepon, Fem. 
: 
Fulvus, thoracis vittis quatuor abdomineque nigris, hujus lateribus ven- 
ireque fulvis, antennis nigris, pedibus fulvis, femoribus tibiisque 
apice nigris, alis subfuscis. 
Head adorned with a pale tawny covering, which has a silky lustre, 
having a very few black hairs and bristles on the crown, beset behind the 
eyes with a row of black bristles, thickly clothed beneath with white hairs 4 
face slightly prominent, beset with very few black bristles, armed with eight 
