46 MUSCID^E. 



half the length ; radial vein ending at before five-sixths of the length ; 

 cubital vein joining the costal very near its tip ; prsebrachial vein forming 

 a very slightly obtuse angle at its flexure, near which it is curved in- 

 ward, and is thence almost straight to its tip ; discal transverse vein 

 with two slight curves, parted from the border by a little more than its 

 length, and by much less than its length from the flexure of the pra3- 

 brachial. 

 Bare. (E.) 



61. defecta, n. Nigra, cano-tomentosa, capite albo, frontalibus 

 ferrugineis, thorace mgro-quadrimttato, alis subcinereis, alulis albis, 

 abdomine ovato, segmentorum marginibus anticis nigris. Long. 4 ; 

 alar. 7 lin. 



Frontalia broad ; bristles of the front descending to half the length 

 of the face ; face very oblique ; epistoma not prominent. Antennae 

 seated on a projection, reaching the epistoma ; third joint linear, almost 

 truncate at the tip, a little more than twice the length of the second ; 

 sixth very minutely pubescent, stout along three-fourths of the length, 

 a little longer than the third. Thorax with four slender black stripes. 

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

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

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

 much beyond three-fourths of the length; cubital vein joining the 

 costal very near its tip ; prasbrachial vein forming a very slightly obtuse 

 not sharply denned angle at its flexure, between which and its tip it is 

 very slightly inclined inward ; discal transverse vein with two curves, 

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

 than its length from the flexure of the pra3brachial. 



Bare. (E.) 



62. dorsalis, Meig. Zw. iv. 325. 148 (1824). Nigra, cano-to- 

 mentosa, capite albo, frontalibus rufo-piceis, thorace nigro-trivittato, alis 

 cinereis antice subfuscis, alulis fusco-cinereis, abdomine obconico piceo 

 cano-tomentoso, basi vittaque dorsali nigris, maculis quatuor piceis. 

 Long. 2^; alar. 5 lin. 



Frontalia widening much in front ; bristles of the front descending 

 to one-fourth of the face ; face vertical ; epistoma not prominent. An- 

 tennas not reaching the epistoma ; second joint longer than deep ; third 

 linear, slightly rounded at the tip, full twice the length of the second ; 

 fourth almost obsolete ; fifth very short ; sixth very minutely pubescent, 

 stout for one-fourth of the length, full twice the length of the third. 

 Thorax with three broad black stripes. Costal vein ending at a little in 

 front of the tip of the wing ; subcostal vein ending at a little beyond 

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

 of the length ; radial vein ending at a little before five-sixths of the 

 length ; cubital vein ending near the costal ; prsebrachial vein forming 

 a very obtuse angle at the flexure, hardly curved inward from thence 



