Descriptions of new species of Hymenoptera. 77 
rather truncated at tip, and emarginated by the curvature 
of the radial cellule; smaller central cellule with a small 
angle at tip, where it is widest, and gradually tapering to 
its opposite extremity without any curvature; feet honey- 
yellow, short, anterior coxae with a whitish reflexion j 
abdomen short, almost sessile, not compressed. 
Length about one-fifth of an inch. 
ALYSIA. Latr. 
1. A. ridibunda. Rufous; head, wings and tip of the 
tergum, black. 
Inhab. Indiana. 
Body yellowish-rufous; head black, a rufous spot each 
side of the mouth; antennse longer than the body; wings 
blackish; central cellule large, longitudinal, acute before, 
nervure connecting with the carpal spot placed obviously 
behind the middle of the cellule; feet black; tibias and 
tarsi more or less tinged with dull rufous; tergum de* 
pressed, near the tip a large black spot. 
Length $ nearly one-fifth of an inch. 
2. A. pallipes. Black; feet, abdomen at base and an% 
tennae at base, white. 
Inhab. Indiana. 
Body black, polished; antennse fuseous, first and se^ 
cond joints whitish; piceous; 2«;m^5 hyaline, 
central cellule in length equal to double its greatest 
width; feet white; abdomen white at base. 
Length one-twentieth of an inch. 
BRACON. JuR. Fab. Latr. 
1. B. exhalans. Black; abdomen sanguineous.- 
Inhab. Indiana. 
Mead black; palpi whitish; antemicP shorter than thf; 
Vol. I. .11 
