TACHINA. 27 



wing ; subcostal vein ending at a little beyond one-third of the length ; 

 mediastinal vein ending at half of the length ; radial vein ending at 

 four-fifths of the length ; cubital vein ending at near the tip of the 

 costal ; pra^brachial vein forming a right angle at the flexure, which 

 emits a long branch, curved inward near this, and thence almost straight 

 to tlie tip ; discal transverse vein with two distinct curves, parted by 

 much less than its length from the flexure of the praibracliial, and by 

 more than its length from the border. Abdomen long, obconical ; base, 

 tip, hind borders of segments, and dorsal stripe black. 

 Eare. In Mr. Desvignes^s collection. (E.) 



18. defecta, n. Nigra, cano-tomentosa, capite albo, palpis nigris 

 apice fulvis, thorace nigro-trivittato, alis subcinereis, alulis albis, abdo- 

 raine elliptico tessellato. Long. 5 ; alar. 9 lin. 



Frontalia deep black, widening in front ; bristles of the fi-ont not 

 descending along the face ; face vertical ; facialia bristly along one- 

 sixth of the length ; epistoma not prominent ; palpi clavate, with tawny 

 tips. Antennte nearly reaching the epistoma ; second joint longer than 

 deep ; third linear, rather deep, rounded at the tip, much longer than 

 the second ; fourth very short ; fifth rather short ; sixth pubescent, 

 stout for one-third of the length, twice the length of the third. Costal 

 vein ending at some distance in front of the tip of the wing ; subcostal 

 vein ending at beyond one-third of the length ; mediastinal vein ending 

 at beyond half of the length ; radial vein ending at five-sixths of the 

 length ; cubital vein ending near the tip of the costal ; prsebrachial 

 vein forming a very slightly obtuse angle at the flexure, slightly curved 

 inward from thence to the tip ; discal transverse vein with two very 

 slight curves, parted by about half its length from the flexure of the 

 pra^brachial and from the border. Alula3 white. Abdomen elliptical, 

 tessellated. 



Rare. In Mr. Desvignes's collection. (E.) 



19. sestiva ? Meig. Zw. iv. 278. 68 (1824). Nigra, cano-tomen- 

 tosa, capite albo, setisfrontaHbus usque ad faciei (jiiartam extensis, thorace 

 nigro-quadrivittato, alis cinereis, alulis albis. Long. ?)\ ; alar. 7 lin. 



Head white in front ; frontalia pieeous, widening in front ; bristles 

 of the front descending to one-fourth of the face ; face vertical ; facialia 

 bristly to one-sixth of the length ; epistoma not prominent ; palpi 

 black. Anteunee nearly reaching the epistoma; second joint nearly 

 twice longer than deep ; third truncated, slightly convex beneath, very 

 much longer than the second ; fourth indistinct ; fifth very short ; sixth 

 bare, stout for full one-third of the length, twice the length of the 

 third. Costal vein with a spine at the tip of the subcostal, ending at 

 some little distance in front of the tip of the wing ; subcostal vein 

 ending at beyond one-third of the length ; mediastinal vein ending at 

 a little beyond half of the length ; radial vein ending at five-sLxths of 

 the length ; cubital vein forming an obtuse angle at the flexure, very 



