I 



260 Say^s Descriptions of 



The cubital cellules are but two, the second transverse 

 nervure being entirely wanting, and the nervure forming 

 the anal side of the cubital cellules is very slender ; the 

 ^ other nervures being quite robust. If the genera through- 

 out this order, are to be divided as in the te^tthredij^etj^, 

 I would propose the separation of this and the following 

 species, under the generic name of Aliolus. 



The character of the abdomen agrees with this genus ; 

 but the neuration of the wings seems to agree rather 

 better with Microgaster. 



20. B. thoracicus. Black ; thorax and feet honey- 

 yellow. 



Inhabits Indiana. 



2 Head — : tliorax honey-yellow, with two 



oblique, lineated grooves ; suture before the scutel much 

 dilated, and profound : wings hyaline ; radial cellule 

 with the nervure as distinct as the others, regularly 

 arcuated, without any angulation ; second cubital cellule 

 much dilated and destitute of the exterior nervure : meta" 

 thorax black : abdomen minutely punctured or lineated 

 at base, polished towards the tip, oval ; second incisure 

 indistinct : oviduct longer than the abdomen : feet honey- 

 yellow. 



Leno^h less than one tenth of an Inch. 



MicBOGASTER, Latr. 



1. M, ensiger. Black ; feet and each side of the 

 base of the abdomen yellowish. 



Inhabits Indiana. 



$ Body black, wdth dilated punctures and minute 

 hairs : mouth honey -yellow : pal^i white : thorax with 

 a yellow wing-scale ; suture before the scutel impressed 



