DIPTERA. 267 
on each side towards the base and beneath : legs black; thighs tinged with 
gray: wings and alule gray ; wings lurid at the base. Length of the 
body 6 lines; of the wings 14 lines. 
South America. 
2. Tacuina TRIFoRMIs, Fem. 
Testacea ; caput antice et subtus auratum; antenne nigra; abdomen 
subtus nigricans ; pedes nigri. 
Fem. Dark testaceous : head above furrowed, with a tawny scapula 
above the base of the feelers; fore part and under side gold colour : mouth 
pitchy : feelers black ; third joint very much longer than the second : breast 
pale testaceous: abdomen much broader than the chest; hind borders of 
the segments thickly beset with very stout black spines; under side 
blackish: legs black. Length of the body 7—8 lines; of the wings 16— 
18 lines. 
Columbia. 
3. TacHina norata, Fem. 
Atra ; caput cinereo-luridum ; thorax subcinereus, nigro quadrivittatus ; 
scutellum nigro-piceum ; ale subfusce, basi subluride ; vene trans- 
verse fusco marginate. 
Deep black: head with a lurid gray covering ; frontal region with 
very few bristles on each side; frontalia dark ferruginous ; interfrontalia 
indistinct; each of the facialia with a row of bristles which does not 
extend above the epistoma, the latter is very prominent; lateralia tawny : 
third joint of the feelers a little longer and deeper than the second, very 
slightly convex above, beneath and at the tip: chest slightly tinged with 
gray, which has on the fore part four very slender black stripes ; scutcheon 
pitehy black : abdomen much broader than the chest: wings pale brown, 
with a lurid tinge near the base; cross-veins clouded with dark brown ; 
prebrachial vein forming an acute angle at its flexure, beyond which it is 
much curved: alule white. Length of the body 7 lines; of the wings 
16 lines. 
Columbia. 
