MACLURIAN LYCEUM. 373 



[Prom Contributions of tho Maclurian Lyceum to the Arts and Sciences. 

 Vol. I., Pliiladelphia, pp. 67—83.] 



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



lleiul M;ir.h 3, 1S28. 



AULACUS Jurinc. 



A. FASCIATUS. — Wings violaceous with hyuliue Ijund. 



Inhabits Ohio. 



Body black; thorax confluently punctured in transverse 

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

 hardly reaching the anal margin j abdomen much compressed ; 

 oviducts longer than the abdomen, much incurved at tip. 



Length half an inch. [68] 



ICHNEUMON Linn. Fabr. 



1. I. PAR.VTA. — Antoniise bhuk with a whitish auuulaiion ; 

 tergum yellow, with live or six blackish bands. 



Inhabits Indiana. 



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

 tenna; black ; basal and second joint beneath and 15, 10, 17, 18, 

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

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

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

 a small spot behind it, yellow : nietathorax, posterior disk, j'cllow ; 

 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 ba.sal incisure, and spot on the disk near the tip, black ; 

 remaining segments with a blackish band at their bases more or 

 less emarginated in their middles; beneath yellow; pectus and 

 postpectus with the transverse incisure, black; posterior feet, 

 coxae above, excepting at tip, thighs, excepting at base, tibia; at 

 tip and first and second joint.s 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. 



