Descriptions of new species of Hymenoptera. 81 
2. P. obtusus. Black; feet whitish, thighs black in the 
middle. 
Inhab. Indiana. 
Body black, polished; antenrise fuscous; anterior 
wings wide and very obtuse, finely ciliated, ciliae very 
short; feet whitish; thighs black, white at base and tip; 
coxae black. 
Length nearly one-twentieth of an inch. 
PLATYGASTER. Latr. 
P. pallipes. Body black; antennse fuscous, monili- 
form; basal joint honey-yellow; ivings hyaline; abdo- 
men polished, much depressed: widest near the tip and 
obtuse, gradually and rectilinearly a little narrowed to 
the base; feet whitish-yellow. 
Length one-thirtieth of an inch. 
BETHYLUS. Latr. 
B. armiferus. Black; tergum with elongated white 
hairs. 
Inhab. Indiana. 
Body entirely black, immaculate, with short hairs; 
head covered with discoidal punctures; tergum polish- 
ed, with a few elongated, rigid, white hairs, as long as 
two of the segments taken together* 
Length seven-twentieths of an inch. 
DRYINUS. Latr. 
D. bifasciatus. Yellowish; wings bifasciate, 
Inhab. Indiana. 
Body honey -yellow, varied with blackish; anterior 
Mz^/i^ dilated; wings with two fuscous bands, the api- 
cial one broader. 
Length rather more than one-fifth of an inch* 
