374 Al'i'ENDiX. 



ed by the fourth nervure as far as the middle, where it i? 

 abruptly contracted so as to be included by the first api- 

 cial nervure for a short distance, when it is gradually con- 

 tracted so as to be included by the two costal nervures ; 

 anastomosis near the centre of the wing, blackish ; fett 

 black ; poisers fuscous, capitulum whitish. 



Length more than three-tenths of an inch. 



The disposition of the wing nervures of this species cor- 

 responds with that of the fifth tribe in Wiedemann's ar- 

 rangement. 



LAPHRIA. 



1. h. posiicaia. Black ; thorax and before the tip of the 

 tergum covered with yellow hair. 



Inhabits North-west Territory. 



Jintennse, hair of the vertex and of each side of the an- 

 tennae, black ; long hair beneath the antennae yellowish ; 

 hair of the cheeks long, white; Mor«a? covered with yel- 

 low hair, immaculate ; pleura and pectus black, tlie latter 

 with long whitish hair between the feet ; poisei's yellow- 

 ish-white ; wings dusky j tergum blued-black, polished, 

 with black hairs each side ; two last segments and poste- 

 rior margin of the preceding segment covered with yellow 

 hair ; venter polished, immaculate. 



Length three-fifths of an inch. 



2. L. Jlavicollis. Black ; wings dusky ; hair of the head 

 and thorax yellow. 



Inhabits North-west Territory. 



Head with long yellow hairs, and a few black ones over 

 the mouth ; pi'oboscis, antenna;, and patpi black, the lat- 

 ter with black hairs ; thorax thickly clothed with yellow 

 hair, immaculate ; icings dusky ; nervures fuscous j poisers 



