42 MUSCID.E. 



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

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

 segmentorum marginibus posticis basi vittaque dorsali nigris. Long. 3^ ; 

 alar. 6 lin. 



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

 to half of the face ; face vertical ; epistoma 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 ; prsebra- 

 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 prasbrachial, and by much more from 

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

 hind borders of the following segments black. 



Rare. 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 fulvo, vitta dorsali abbreviata nigra, 

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



Erontalia 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 the 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 ; 

 praabrachial 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 prabrachial 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 ; tibice tawny. 



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



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

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

 alis subcinereis, alulis albis, abdomine ovato, segmentorum marginibus 

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



