218 long's second expedition 



STEPHAXUS Jur. 



S. rufipes. — Black; abdomen sessile; thorax not remarkably 



attenuated before. 



Inhabits Pennsylvania. 



Body somewhat sericeous ; palpi pale yellowish ;• scutel with a 

 groove on each side, rough ; metathorax rough, and with two 

 slightly elevated, longitudinal, distant lines; wings hyaline; a 

 large, triangular, fuscous, carpal spot ; feet rufous ; posterior 

 pair of tarsi dusky ; abdomen a little rough at base ; oviduct as 

 loi g as the abdomen. 



Length one-fifth of an inch. 



Although tbe arrangement of the wing nervures agrees pre- 

 cisely with jS. coronatus Jur., yet the form of the body differs 

 materially, the thorax not exhibiting the remarkable [325] atten- 

 uation before, and the abdominal petiole is not visible. 



ACAEXITUS Latr. 

 (Anomalon Jur.) 



A. stiomapterus. — 9 Black; incisures of the feet white. 



Inhabits Xorth-west Territory. 



Thorax densely punctured ; two dilated grooves confluent 

 behind ; scutel united to the thorax by a carinated line each side ; 

 wings tinged with fuliginous ; nervures blackish ; stigma termi- 

 nated before by a small white spot ; metathorax with large con- 

 fluent punctures ; terminated on each side behind by a short 

 conic process ; pleura and pectus polished ; tibia3 at base, first 

 joint of the tarsi at base, and near the tip of the tarsi, white. 



Length more than one inch. 



Well distinguished by the white points on the wings, and the 

 white annulations of the feet. The head in my specimen is defi- 

 cient. 



IBALIA Latr. 



I. Anceps. — Dull ferruginous; wings blackish; abdomen 

 piceous. 



Inhabits Arkansa and St. Peter's rivers. 



Head with a black curved line at base of the antennae; collar 

 abruptly elevated at anterior edge, and slightly emarginate in the 



