MACLURIAN LYCEUM. 373 



i From Contributions of the Maclurian Lyceum to the Arts and Sciences. 

 Vol. L, Philadelphia, pp. 67—83.] 



A Description of some new species of Hymenoptera of the United States. 



Read March 3, 1828. 



AULACUS Juriue. 



A. fasciatus. — Wings violaceous with hyaline band. 



Inhabits Ohio. 



Body black; thorax confluently punctured in transverse 

 grooves ; wings violaceous with a hyaline band on the middle, 

 hardly reaching the anal margin ; abdomen much compressed ; 

 oviducts longer than the abdomen, much incurved at tip. 



Length half an inch. [68] 



ICHNEUMON Linn. Fabr. 



1. I. PARATA. — Antennae black with a whitish annulation ; 

 iergum yellow, with five or six blackish bands. 



Inhabits Indiana. 



Head yellow ; disk of the vertex and the occiput black ; an- 

 tennae black ; basal and second joint beneath and 15, 16, 17, 18, 

 19 and 20 joints pale yellowish : thorax black ; band on the 

 collar, line on each side extending to the wings, and iuterupted 

 before, and a small quadrate spot on the disk, yellow; scutel and 

 a small spot behind it, yellow : metathorax, posterior disk, yellow ; 

 wings somewhat dusky with fuscous nervures ; stigmata pale 

 brownish; central cellule pentangular and transverse, not at all 

 oblique, the superior side very short; tergum, basal segment 

 with the basal incisure, and spot on the disk near the tip, bla.k : 

 remaining segments with a blackish band at their liases more or 

 less emarginated in their middles; beneath yellow; pectus and 

 postpectus with the transverse incisure, black; posterior feet, 

 coxse above, excepting at tip, thighs, excepting at base, tibia at 

 tip and first and second joints of tarsi, black ; venter with paler 

 and less perfect bands than those of the tergum. 



Var. a. Intermediate thighs black on their middle above 

 Length two-fifths of an inch. 



