long's second expedition. 255 



of the wing, blackish ; feet black ; poisers fuscous, capitulum 

 whitish. 



Length more than three-tenths of an inch. 



The disposition of the wing nervures of this species corres- 

 ponds with that of the fifth tribe in Wiedemann's arrangement. 



LAPHRIA. 



1. L. POSTiCATA. — Black; thorax and before the tip of the 

 tergum covered with yellow hair. 



Inhabits North-west Territory. 



Antennae, hair of the vertex and of each side of the antennge, 

 black ; long hair beneath the antennae yellowish ; hair of the 

 cheeks long, white; thorax covered with yellow hair, immacu- 

 late ; pleura and pectus black, the latter with long whitish hair 

 between the feet ; poisers yellowish-white ; wings dusky ; tergum 

 blued-black, polished, with black hairs each side ; two last seg- 

 ments and posterior margin of the preceding segment covered 

 with yellow hair ; venter polished, immaculate. 



Length three-fifths of an inch. 



2. L. FLAVICOLLIS. — 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; proboscis, antennae, and palpi black, the latter with 

 hairs ; thorax thickly clothed with yellow hair, immaculate ; 

 wings dusky; nervures fuscous; poisers [375] dark reddish- 

 brown; feet with black hair; a few pale hairs on the basal half 

 of the thighs, and many about the origin of the feet ; tergum 

 black, with a slight shade of blue, polished, and with black 

 hairs. 



Length more than half an inch. 



This species resembles the thoracica Fabr., but may be di?i- 

 tinguished by the color of the hair of the head ; it is also a 

 smaller insect, with a more slender form. 



ASILUS. 



A. ABDOMINALIS. — Black; hypostoma silvery; tergum fulvous 

 in the middle. 



Inhabits North-west Territory. 



