70 MUSCID.E. 



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 a little before five-sixths of the length ; cubital vein 

 ending very near the tip of the costal; prcebrachial vein forming an ob- 

 tuse angle at the flexure, hardly curved inward from thence to the tip ; 

 discal transverse vein with two indistinct curves, parted by a little less 

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

 from the border: 



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



116. infix a. Nigra, cano-tomentosa, capite albo, thorace nigro- 

 quadrivittato, alis subcinereis, vena prcebrachiali angulum valde obtusum 



Jingente, alulis albidis, abdominis vitta dorsali brevi gracili nigra. Long. 

 2; alar. 5 lin. 



Frontalia with grey tomentum ; bristles of the front descending to 

 one-fourth of the face ; epistoma not prominent. Antennae not reach- 

 ing the epistoma ; third joint very slightly decreasing in breadth towards 

 the tip, which is obliquely rounded, much more than twice the length of 

 the second ; sixth very minutely pubescent, stout at the base, nearly twice 

 the length of the third. Thorax with four black stripes. Costal vein 

 ending at very little above the tip of the wing ; subcostal vein ending 

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

 about half the length ; radial vein ending at very little before four-fifths 

 of the length ; cubital vein joining the tip of the praBbrachial ; prcebra- 

 chial vein forming a very obtuse and not sharply defined angle at its 

 flexure, between which and its tip it is almost straight ; discal trans- 

 verse vein with two rather deep curves, parted from the border by very 

 little less than its length. 



Bare. (E.) 



117. reventa. Atra, nitens, angusta, capite albido, thorace non 

 vittato, alis cinereis, vena prabrachiali angulum perobtusum jingente, 

 alulis albidis, abdomine elliptico. Long. 2^ ; alar. 5 lin. 



Male. Frontalia widening much in front; bristles of the front de- 

 scending along half the face ; facialia beset with bristles for one-third 

 of the length ; epistoma very slightly prominent. Antennas not reach- 

 ing the epistoma ; third joint linear, rounded at the tip, a little more 

 than twice the length of the second; sixth pubescent, stout for full 

 one-third of the length from the base, more than twice the length of 

 the third. Thorax not striped. Costal vein ending where the pra3- 

 brachial meets it at very little above the tip of the wing ; subcostal 

 vein ending before one-third of the length ; mediastinal vein ending 

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

 length ; cubital vein joining the costal very near its tip ; prcebracldal 

 vein forming a very obtuse and not sharply defined angle at its flexure, 

 between which and its tip it is hardly curved inward ; discal transverse 

 vein with the hind curve deeper than the other, parted from the border 



