74 MUSCIDJ3. 



verse vein with two slight curves, parted from the border by more than 

 its length, and by little more than its length from the flexure of the 

 prsebrachial. 

 Eare. (E.) 



125. certans, n. Nigra, cano-tomentosa, capite albo, palpis fulvis, 

 thorace nigro-quinquevittato, alis subcinereis, alulis albis, abdomine 

 obconico tessellato. Long. 4 ; alar. 8 lin. 



Frontalia black ; bristles of the front descending to one-fourth of the 

 face ; epistoma not prominent ; palpi tawny. Antennae almost reach- 

 ing the epistoma ; third joint rather broad, ferruginous at the base, 

 almost truncated at the tip, nearly twice the length of the second ; sixth 

 slightly tapering from the base to the tip, more than twice the length 

 of the third. Costal vein ending a little in front of the tip of the 

 wing ; subcostal vein ending at about one-third of the length ; medi- 

 astinal vein ending at a little beyond half the length ; radial vein end- 

 ing at about five-sixths of the length ; cubital vein joining the costal 

 near its tip ; prsebrachial vein forming an almost right angle at its 

 flexure, from which it is curved inward to its tip ; discal transverse vein 

 with two very indistinct curves, parted from the border by a little more 

 than half its length, and by less than its length from the flexure of the 

 prsebrachial. 



Eare. (E.) 



126. atrata, Fal. Msc. 34. 71 (1810); Zett. Nigra, cinereo-to- 

 mentosa, capite albo, palpis nigris., thorace nigro-quadrivittato, alis sub- 

 limpidis basi subluridis, alulis subcinereis, abdomine longi-ovato hir- 

 sutissimo. Long. 3 ; alar. 7 lin. 



Bristles of the front descending to one-fourth of the face ; face short, 

 vertical ; epistoma not prominent ; palpi black. Antennse nearly reach- 

 ing the epistoma ; second joint longer than deep ; third linear, rounded 

 at the tip, nearly twice the length of the second ; fourth indistinct ; 

 fifth very short ; sixth very minutely pubescent, stout to one-sixth of 

 the length, more than twice the length of the third. Costal vein with 

 a spine at the tip of the subcostal, ending at a little 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 before half of the length ; 

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

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

 obtuse angle at the flexure, hardly curved inward from thence to the 

 tip ; discal transverse vein with two distinct curves, parted by less than 

 its length from the flexure of the prsebrachial, and by half its length 

 from the border. 



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



127. angustipennis ? Meig. Zw. iv. 333. 162 (]824); Mcq. 

 Nigra, cano-subtomentosa, capite albo, facialibus ad quartam setosis, 

 thorace nigro-trivittato, alis cinereis, alulis albo-subcinereis, abdomine 



