TACH1NA. 91 



longer than the third. Costal vein ending at hardly above the tip of 

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

 mediastinal vein ending at beyond half the length ; radial vein ending 

 at about four-fifths of the length ; cubital vein joining the costal at its 

 tip ; praebrachial vein ceasing on approaching the border of the wing, 

 and with no flexure ; discal transverse vein almost straight, parted from 

 the border by nearly twice its length. Legs tawny ; tarsi black. 

 Not common. (E.) 



163. infestans, n. Nigra, cervino-tomentosa, capite albido, fa~ 

 ciali&us ad dimidium setosis, antennis basi fulvis, articulo tertio secundo 

 quadruplo longiore, thorace nigro-quadrivittato, alis subcinereis, basi 

 subluridis, alulis albidis, abdomine ovato, pedibus fulvia, tarsis rigris. 

 Long. 2f ; alar. 5 lin. 



Frontalia piceous ; bristles of the front descending to one-third of 

 the face ; facialia bristly along half the length ; epistoma not promi- 

 nent ; palpi tawny. Antennae reaching the epistoma ; third joint sub- 

 linear, hardly broader towards the tip, which is almost truncated, about 

 four times the length of the second; sixth stout till near the tip, longer 

 than the third. Costal vein ending at very little above the tip of the 

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

 tinal vein ending at hardly half the length ; radial vein ending at a 

 little beyond five-sixths of the length ; cubital vein joining the costal 

 very near its tip ; prsebrachial vein forming a very obtuse angle at its 

 flexure, between which and its tip it is very slightly inclined inward ; 

 discal transverse vein straight, parted from the border and from the 

 flexure of the praebrachial by twice its length. Legs tawny ; tarsi 

 black. 



Bare. (E.) 



164. albicans? Fal. Msc. 35. 74- (1810); Meig.; Zett. Nigra, 

 cano-tomentosa, capite albo,facialibus non setosis, palpis fulvis, antennis 

 basi ferrugineis, thorace nigro-quadrivittato, alis et alulis albidis, ab- 

 domine obconico, vitta dorsali et segmentorum marginibus posticis 

 nigris, femoribus apice subtus tibiisque ferrugineis. Long. 2^ ; alar. 

 6 lin. 



Frontalia red, slightly widening in front ; bristles of the front de- 

 scending to one-fourth of the length of the face ; face vertical ; facialia 

 without bristles ; epistoma not prominent. Antennae reaching the epis- 

 toma ; third joint slender, linear, truncated, four times the length of the 

 second; fourth and fifth indistinct; sixth bare, stout for half the 

 length, very much longer than the third. Costal vein ending at the 

 tip of the wing ; subcostal vein ending at much beyond one-third of 

 the length; mediastinal vein ending at beyond half of the length; 

 radial vein ending at beyond five-sixths of the length; cubital vein 

 ending very near the tip of the costal ; praebrachial vein forming a very 

 obtuse angle at its flexure, hardly curved inward from thence to its tip ; 



