248 Say^s Descriptions of 



not obviously excavated behind, but with somewhat 

 raised lines; abdomen arcuated; towards the tip rather 

 abruptly clavate ; punctures very small : oviduct, as long 

 as the tip of the abdomen : feet honey-yellow, with a 

 white reflection ; posterior tibiae white with black tip and 

 base ; posterior tarsi black, base of the first joint white, 

 in the male the white of the posterior tibiae is less 

 obvious. 



Length from one fourth to three tenths of an inch. 



I obtained a specimen from a very pretty cocoon 

 which is somewhat cylindric, white, with two maculated 

 black bands. 



Ac^NiTus, Latr. 



X 



* — 



1. A. decorus. Black varied with whitish; posterior 

 tarsi whitish. 



Inhabits Indiana. 



9 Body black : orlits white, interrupted above and 

 before : hypostoma white, nasal sutures black each side : 

 mandibles black : antenna with ten or twelve white 

 joints beyond the middle : thorax with the hne over the 

 wings, wing-scale, line before the wings, and lateral and 

 posterior margin of the anterior lobe white : scutel white : 

 wings hyaline, with a rounded fuscous spot at tip : meta- 

 thorax, a small spot under the scutel and behind whitish : 

 ahdomen, posterior margins of the segments white; in 

 profile clavate; dorsal view fusiform: venter white; 

 scale prominent, acute : oviduct much longer than the 



abdomen : 



feet 



yellow : posterior pair of coxae with three large yellow- 

 spots ; incisures of the posterior thigh black ; posterior 

 tarsi whitish. 



