LONG S SECOND EXPEDITION. 213 



and costal edge; feet pale rufous; posterior tarsi and their tibise 

 at tip blackish. 



Length of the body half an inch. 



4. T. terminates. — Antennae white at tip; abdomen testa- 

 ceous. 



Inhabits United States. 



9 Body black; head testaceous; venter with a blackish longi- 

 tudinal vitta; antennae black, four last joints white; stethidium 

 black ; thorax with a piceous triangle before, and a large yellow 

 spot behind; thorax with two small yellow spots; wings tinged 

 with fuliginous; nervures fuscous; carpal spot whitish on the basal 

 half; pleura with a large testaceous spot beneath the superior 

 wings ; feet testaceous, coxae black, tip of the posterior coxae 

 white ; abdomen entirely testaceous. 



% Tip of the antennae pale yellowish ; superior orbits with a 

 white sagittate spot; occiput each side with a white spot; instead 

 of the piceous triangle of the thorax is a white V-like spot; pleura 

 testaceous; pectus testaceous, disk and posterior coxae at base 

 black. 



Length seven-twentieths of an inch. 



The white terminal joints of the antennae of this species are 

 very distinct and striking. 



5. T. pygm^ea. — Black; thorax rufous before; feet white. 

 Inhabits United States. 



% 9 Body polished; hypostoma obscure whitish ; thorax, an- 

 terior segment rufous, collar dusky; wings dusky; feet white; 

 thighs blackish in the middle behind; posterior tibiae and tarsi 

 black. 



Length % one fifth of an inch, 9 rather more. 



DOLERUS Jur. [319] 



1. I). inornatus. — Body black, polished; feet white; tarsi 

 dusky. 



Inhabits United States. 



9 Labrum and palpi whitish; thorax with a line before the 

 wings and wing-scale, white; scutel with a small bullate white 

 spot on each side; wings a little dusky ; nervures blackish-fus- 

 cous; pleura with an abbreviated white line over the interna 

 feet; coxae color of the feet. 



