DIPTERA. 181 
than the chest, ferruginous and adorned with a patch of white hairs on each 
side of the base; underside ferruginous except the middle part which is 
pitchy and adorned with white hairs: legs tawny, clothed with very short 
black bristles ; feet pitchy ; claws black, tawny at the base: wings colour- 
less, tarony at the base and along half the length of the fore border ; shoulders 
beset with black bristles ; wing-ribs tawny ; veins pitchy, tawny at the base 
and along the fore border; scales tawny ; poisers yellow. Length of the 
body 5 lines ; of the wings 11 lines. 
Cape. 
ANTHRAX DETEOCTA, Fem. 
Nigra, angusta, flavo-hirta, thoracis lateribus albo nigroque fasciculatis, 
antennis pedibusque nigris, femoribus posterioribus basi fulvis, alis 
limpidis basi et coste triente fulvis. 
Black, narrow: head clothed with silvery white hairs: chest and 
breast clothed with yellow hairs : abdomen linear, conical at the tip, a little 
longer than the chest, clothed with yellow hairs, adorned on each side with 
alternate tufts of black and white hairs: legs clothed with short black hairs 
and bristles; four hinder thighs tawny towards the base: wings colourless, 
tawny at the base and along one-third of the fore border ; shoulders adorned 
with pale yellow hairs; wing-ribs pitchy; veins black, pitchy at the base 
and along the fore border; scales tawny ; poisers yellow. Length of the 
body 4 lines ; of the wings 9 lines. 
South America. 
ANTHRAX VITREA, Fem. 
Nigra, angusta, fulvo-hirta, antennis pedibusque nigris, tibiis piceis, alis 
limpidis basi fulvis. 
Black, narrow, clothed with tawny hairs: sucker pitchy : abdomen ob- 
conical, a little shorter than the chest: shanks pitchy: wings colourless with 
a slight tawny tinge at the base ; wing-ribs pitchy ; veins black, pitchy at 
the base and along the fore border ; poisers pitchy with yellow knobs. 
Length of the body 23 lines; of the wings 6 lines. 
West Australia. 
