North American Hymenoptera. 295 



MuTiLLA^ Linn. 



* Eyes emarginate. 



1. M. contracta. Black; above ferruginous; wings 

 blackish. 



Inhabits Arkansaw and Missouri. 



Body entirely black beneath, inclusive of the feet : 

 ahove ferruginous-yellowish : head black below the line 

 of the eyes : metatkoi'ox, petiole j anterior and lateral de- 

 clivities of the abdomen black, ^anterior half of the 

 first sefjrnent of the tero;um black: ^775-5 blackish-fulio^- 



*J O O O 



inous, somewhat paler in the middle ; second cubital 

 cellule wide beneath and contracted but not angulated at 

 the radial cellule; third cubital cellule so much con- 

 tracted at base that its extreme nervure is opposite to 

 and joins the recurrent nervure. 

 Length about half an inch. 



o 



The neuration of the wings somewhat resembles that 

 of the maura, F. and is nearly the same as that of the 



Mexico. I obtained several speci- 



Missouri 



F 



Arkansaw. 



„ 2. M. hexagona, ^ Black ; abdomen honey-yellow. 



Inhabits Indiana and Missouri. 



Sody black, much punctured, and with a slight reflec- 

 tion of silvery hairs, particularly on the head, on the 

 anterior segment of the thorax and on the metathorax: 

 thorajc with four slight, impressed lines, and numerous 

 confluent punctures : metathorax reticulate with punc- 

 tures, and with a slight groove from the base nearly to 

 the middle : wings dark purplish-fuliginous ; radial cel- 

 lule rounded at tip, not truncate ; third cubital cellule 



