DIPTERA. 191 
ANTHRAX ILLATA, Fem. 
Nigra, nigro-hirta, thoracis lateribus pilis flavis vittatis, abdominis fasci- 
eulis basi fasciis duabus apiceque albo-hirtis, pedibus nigris, tibiis 
fulvis, alis fuscis fulvo et cinereo guttatis, angulis duabus posticis 
incisis. 
Black, clothed with deep black hairs: head wanting: each side of the 
chest adorned with a stripe of pale yellow hairs: breast tinged with brown: 
abdomen slightly obconical, a little broader but not longer than the chest, 
adorned with white hairs which form a tuft on each side of the base, two 
bands on the back and one at the tip: legs armed with black spines ; 
shanks dark tawny ; feet clothed with short black hairs: wings very dark 
brown, adorned with some pale tawny and gray dots which are chiefly on the 
eross-veins ; a colourless dot on the fore border near the tip, and two large ir- 
regularly-angular colourless intervals on the hind border, one a little beyond 
the middle, the other extending to the tip ; wing-ribs and veins black ; pois- 
ers pitchy with pale yellow tips. Length of the body 4 lines; of the wings 
12 lines. 
ANTHRAX RELATA, Mas. 
Nigro-fusca, thoracis lateribus albo vittatis, abdomine albo bifasciato, an- 
tennis nigris, pedibus piceis, tibiis fulvis, alis nigro-fuscis fulvo gut- 
tatis apice margineque postice sinuato-limpidis. 
Black: head gray behind, clothed with tawny hairs; crown clothed 
with black hairs: chest clothed with black hairs, adorned on each side with 
a stripe of white hairs; scutcheon pitchy ; breast brown, clothed with tawny 
hairs: abdomen very deep brown, obconical, a little longer than the chest, 
clothed with black hairs which form a fringe on each side, adorned with 
two bands of white hairs, one on the first, the other on the fourth segment ; 
there are also some white hairs near the tip which is black; underside 
pitchy, clothed with tawny hairs: legs pitchy, armed with black spines ; 
shanks and tips of thighs tawny, the former adomed with gilded scales ; 
feet clothed with short black hairs: wings very dark brown, adorned with 
some little tawny marks which are mostly on the cross-veins, colourless from 
