42 MUSCID.E. 



52. agilis? Meig. Zw. iv. 307. 118 (1824). Nigra, cano-tomen- 

 tosa, capite albo, tliorace nigro-quadrivittato, alulis albis, abdomine ovato, 

 segmentorum viarginibus posticis basi vittaqiie dorsaU nigris. Long. 3i ; 

 alar. 6 lin. 



Frontalia deep black, linear; bristles of the front descending nearly 

 to half of the face ; face vertical ; epistoraa not prominent. Antennae 

 reaching the epistoma ; second joint nearly twice longer than deep ; 

 third linear, truncated, more than twice the length of the second ; fourth 

 very short ; fifth long ; sixth bare, longer than the third. Costal vein 

 ending far in front of the tip of the wing ; subcostal vein ending at 

 one-third of the length; mediastinal vein ending at one-half of the 

 length ; radial vein ending at very little beyond three-fourths of the 

 length ; cubital vein ending very near the tip of the costal ; prfcbra- 

 chial vein forming an obtuse angle, slightly curved inward from thence 

 to the tip ; discal transverse vein slightly undulating, parted by nearly 

 its length from the flexure of the prajbrachial, and by much more from 

 the border. Abdomen oval ; a slender dorsal stripe, first segment and 

 hind borders of the folloioing segments black. 



Eare, In the late Mr. Stephens's collection. (E.) 



53. rubrica, Meig. Zw, iv. 255. 27 (1824). Nigra, cano-tomen- 

 tosa, capite albo, thorace nigro-quadrivittato, alis subcinereis basi sub- 

 fuscis, alulis albis, abdomine ovato ftdvo, vitta dorsali abbreviata nigra, 

 tibiis fulvis. Long. 4f ; alar. 10 lin. 



Frontalia nearly linear, piceous, ferruginous in front ; bristles of the 

 front descending to one-fourth of the face ; face vertical ; lateralia red ; 

 epistoma not prominent ; palpi testaceous. Antennae red, reaching the 

 epistoma ; second joint much longer than deep ; third subfusiform, 

 truncated, piceous above and at the tip, much more than twice the 

 length of the second ; fourth and fifth very short ; sixth very minutely 

 pubescent, nearly twice the length of the third. Costal vein ending at 

 some distance in front of tlie tip of the wing ; subcostal vein ending at 

 very much beyond one-third of the length ; mediastinal vein ending at 

 very much beyond half the length ; radial vein ending at a little beyond 

 five-sixths of the length ; cubital vein ending near the tip of the costal ; 

 prajbraehial vein forming a very slightly obtuse angle at the flexure, 

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

 with two distinct curves, parted by rather more than half its length 

 from the flexure of the pra3brachial and from the border. Abdomen 

 obconical, tawny, with a black dorsal stripe, which is broad at the base, 

 and does not extend to the tip ; tibim tawny. 



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



54. evidens, n. Nigra, cano-tomentosa, capite albo, antennarum 

 articulo sexto vix qxiurta excepta incrassato, thorace nigro-quadrivittato, 

 alis subcinereis, alulis albis, abdomine ovato, segmentorum marginibus 

 posticis nigris. Long. 4 ; alar. 8 lin. 



