270 INSEOTA SAUNDERSIANA. 
chial vein forming at its flexure an acute angle, near which it is clouded 
with brown, and much curved inward, straight from thence to the tip 
which approaches very near the tip of the cubital vein; lower cross-vein 
with two curves, the lower inward, more shallow than the upper which is 
outward; middle cross-vein clouded with brown: alule white: halteres 
tawny, with pitechy knobs. Length of the body 5} lines; of the wings 
9} lines. . 
South America. 
Tacuina Cacivornix, Mas. 
Ainea, sericea; caput stramineum; scutellum margino postico testa- 
ceum; abdomen viridi-nigrum, apice rufum; pedes nigri; ale 
subcineree, basi albide. 
Head pale straw-colowr, clothed behind and beneath with yellow hairs ; 
crown coppery-black ; frontalia ferruginous, testaceous and slightly widen- 
ing towards the feelers: mouth black, shining, ferruginous at the base and 
at the tip; palpi tawny, subclavate: feelers black; first and second joints 
tawny; third joint very little shorter than the second, straight beneath, 
very convex above, shallower towards the tip than at the base, its height 
more than half its length; orifice near the under side, a little nearer the 
base than the tip; fourth joint about half the length of the fifth which is 
near one-fourth of the length of the sixth: chest brassy, partly silky ; 
scutcheon testaceous alony the hind border: abdomen greenish black, tip 
red: legs black ; claws ferruginous with black tips; onychia tawny: wings 
pale gray, whitish at the base; veins black, tawny at the base ; prebrachial 
vein forming a slightly obtuse angle at its flexure, near which it is a little 
bent inward, straight from thence to the tip; lower cross-vein with two 
very indistinct curves, the lower inward, the upper outward: alule white, 
with pale straw-colour borders: halteres tawny. Length of the body 
5 lines; of the wings 10 lines. - 
California, 
Tacuina pivisa, Mas. 
Nigra; caput album; thorax cinerascens, nigro quadrivittatus ; scutel- 
lum ferrugineum ; abdomen apice albido micans ; ale cineree. 
Black: head with a bright white covering; frontalia ferruginous, 
broader and paler towards the feelers; epistoma prominent: eyes bare : 
