TACHINA. 61 



tance 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 before five-sixths of the length ; cubital 

 vein ending near the tip of the costal; prsebrachial vein forming a 

 slightly obtuse angle at the flexure, very slightly curved inward from 

 thence to the tip ; discal transverse vein with two very slight curves, 

 parted by half its length from the border, and by a little more from the 

 flexure of the prasbrachial. 



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



95. distermina, n. Nigra, cano-tomentosa, capite albo, facia- 

 libus ad plus trientem setosis, thorace nigro-quadrivittato, alis subci- 

 nereis, alulis albis, abdomine obconico subtessellato. Long. 3 ; alar. 

 61in. 



Frontalia piceous-black, broad, slightly narrower in front; bristles 

 of the front descending to half the length of the face ; facialia bristly 

 for more than one-third of the length ; epistoma not prominent. An- 

 tennas nearly reaching the epistoma; third joint linear, truncated at 

 the tip, more than twice the length of the second ; arista stout for two- 

 thirds of the length from the base, very much longer than the third 

 joint, its second joint long. Costal vein ending at some distance in 

 front of the tip of the wing ; subcostal vein ending at a little beyond 

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

 of the length ; radial vein ending at about four-fifths of the length ; 

 cubital vein joining the costal near its tip ; praebrachial vein forming 

 an obtuse and not sharply defined angle at its flexure, between which 

 and its tip it is hardly inclined inward ; discal transverse vein with two 

 distinct curves, parted from the border by more than its length, and 

 by its length from the flexure of the prasbrachial. 

 * Bare. (E.) 



96. demota, n. Nigra, cano-tomentosa, capite albo, facialibus ad 

 bis trientem setosis, palpis fulvis, thorace nigro-quadrivittato, alis sub- 

 cinereis, alulis albis, abdomine longi-obconico tessellato. Long. 4 ; 

 alar. 8 lin. 



Clothed behind and beneath with whitish hairs. Frontalia deep 

 black ; bristles of the front descending to half the length of the face ; 

 face slightly oblique ; facialia bristly for two-thirds of the length ; epi- 

 stoma not prominent. Antennas nearly reaching the epistoma ; third 

 joint linear, rounded at the tip, more than twice the length of the 

 second ; sixth very slender, stout for nearly one-third of the length, a 

 little more than twice the length of the third. Costal vein ending at 

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

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

 radial vein ending at a little beyond three-fourths of the length ; cubital 

 vein joining the costal very near its tip ; praebrachial vein forming an 

 almost right angle at its flexure, near which it forms a very obtuse in- 



