TACHINA. 39 



44. nsta, Zett. D. S. iii. 1044. 36 (1844). Nigra, cano-tomen- 

 tosa, capite pallide flavo, palpis fulvis y thorace nigro-quadrivittato, alis 

 subcinereis, alulis albis, abdomine tessellato. Long. 4 ; alar. 8 lin. 



Frontalia deep black ; bristles of the front descending to one-third 

 of the face ; epistoma hardly prominent ; palpi tavmy. Antennae not 

 reaching the epistoma ; third joint much longer than the second, linear, 

 slightly rounded at the tip ; fifth distinct ; sixth bare, about twice the 

 length of the third ; thorax with four black stripes. Costal vein end- 

 ing at far in front of the tip of the wing ; subcostal vein about one- 

 third of the length ; mediastinal vein a little less than half the length ; 

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

 joining the costal very near its tip ; praebrachial vein forming a hardly 

 obtuse angle at its flexure, near which it is slightly curved inward, and 

 is thence almost straight to its tip ; discal transverse vein with the 

 basal curve inward, more distinct than the other which is outward, 

 parted by more than its length from the border, and by much less than 

 its length from the flexure of the praebrachial. 



Bare. (E.) 



45. intermixta, n. Nigra, cano-tomentosa, capite albo, palpis 

 fulvis, thorace nigro-quadrivittato, alis cinereis, alulis subcinereis, abdo- 

 mine ovato tessellato segmentorum marginibus posticis vittaque dorsali 

 nigris. Long. 3f ; alar. 8 lin. 



Frontalia deep black, slightly widening in front ; bristles of the front 

 descending to half the length of the face ; face vertical ; epistoma not 

 prominent. Antennas reaching the epistoma ; second joint more than 

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

 than the second ; fourth indistinct ; fifth short ; sixth bare, more than 

 twice the length of the third ; thorax with four black stripes. 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 a little beyond half of the length ; radial vein ending at before five- 

 sixths of the length ; cubital vein ending very near the tip of the cos- 

 tal ; preebrachial vein forming a very slightly obtuse angle at the flexure, 

 very slightly curved inward from thence to the tip ; discal transverse 

 vein with a very deep hinder curve, parted by much less than its length 

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

 from the border. Abdomen oval, tessellated ; hind borders of segments 

 and dorsal stripe black. 



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



46. nana, Steph. MSS. Nigra, cano-tomentosa, capite albo, tho- 

 race nigro-bivittato, alis sublimpidis, alulis albis, abdomine subelliptico 

 segmento primo vittaque dorsali nigris. Long. 1 ; alar. 2 lin. 



Frontalia deep black, linear ; bristles of the front descending to one- 

 third of the face ; face vertical ; epistoma not prominent. Antennae 

 reaching the epistoma ; second joint a little longer than deep ; third 



