TACHINA. 45 



of the length, very much longer than the third. Costal vein with a 

 spine at the tip of the subcostal, ending at far in front of the tip of the 

 wing ; subcostal vein ending at one-third of the border ; mediastinal 

 vein ending at a little before half of the border ; radial vein ending at 

 about four-fifths of the border ; cubital vein ending near the tip of the 

 costal ; praebrachial vein forming a somewhat rounded and very slightly 

 obtuse angle at its flexure, very slightly bent inward near this, and 

 thence almost straight to the tip ; disced transverse vein with two dis- 

 tinct curves, parted by nearly its length from the flexure of the prsebra- 

 chial, and by a little more than its length from the border. Abdomen 

 elliptical, black and shining, excepting an interrupted hoary band on 

 the fore border of each segment. 



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



59. divulsa, n. Nigra, cinereo-tomentosa, antennarum articnlo 

 tertio secundo plus duplo longiore, sexto nudo, thorace riigro-quadrivit- 

 tato, alis cinereis basi obscurioribus, vena transversa discali non ejus 

 longitudine ab margine remota, alulis cinereis, abdomine obconico sub- 

 tessellato. Long. 4 ; alar. 8 lin. 



Frontalia wider in front ; bristles of the front descending to full one- 

 third of the face; face vertical; facialia bristly to one-sixth of the 

 length; epistoma not prominent. Antennae nearly reaching the epi- 

 stoma; second joint longer than deep; third linear, truncated, more 

 than twice the length of the second ; fourth very short ; fifth short ; sixth 

 bare, stout to nearly half 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 much beyond one-third of the border ; medi- 

 astinal vein ending at much beyond half of the border ; radial vein 

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

 the costal ; prabrachial vein forming an obtuse angle at the flexure, 

 hardly curved inward from thence to the tip; discal transverse vein 

 with two slight curves, parted by less than its length from the border, 

 and by little more than half its length from the flexure of the prrebra- 

 chial. 



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



60. pertracta, n. Nigra, cinereo-tomentosa, antennarum articnlo 

 sexto basiplumoso, thorace fusco-trivittato, alis subcinereis, alulis albidis, 

 abdomine ovato fasciis tribus fuscis. Long. 2f ; alar. 6 lin. 



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

 face ; epistoma not prominent. Antennae not reaching the epistoma ; 

 third joint straight above, slightly convex beneath, obliquely rounded 

 at the tip, much longer than the second ; sixth plumose for half the 

 length from the base, about twice the length of the third joint. Thorax 

 with three slender brown stripes. Costal vein ending in front at some 

 little distance from the tip of the wing ; subcostal vein ending at a 

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



