North American Ht/meiiojjtera. 



387 



to the antennae, one each side on the clypeus, and antennae 

 beneath, brighter towards the base, dull fulvous : mandi- 

 bles on the exterior margin, honey-yellow ; thorax^ bi-lobed 

 spot on the anterior margin and transverse line behind the 

 scutel, yellow : wing-scale piceous, black on the Inner 

 margin : wings blackish-violaceous : tergum^ first segment 

 on the posterior margin with a yellow band abruptly dilat- 

 ed each side ; second segment at tip with much larger 

 and confluent punctures : feet orange : thighs^ except at 

 the knee, black. 



Length three fifths of an inch. 



Differs from ariy of the varieties of our parietlnus, 

 Linn., I have seeii, though it is nearly allied to that 



species. 



5. O. anormis, S. (Eumenes) Long's second Expedi- 



tion, probably belongs to this genus, but as the head of 



my specimen is destroyed, I cannot be certain whether it 



may not be a Pterocheilus, Klug- It is like the ocu- 



IdtiiSj S. 



Lethus, F. Latr. 



k - 



r" 



L. spinipes. Black ; clypeus broader than long ; first 

 abdominal segment somewhat white at tip : 



Inhab. Indiana. 



Body black, punctured : clypeus much wider than long : 

 wings dark violaceous : tergurfi slightly punctured ; pe- 

 duncle rather slender, somewhat gibbous, with an indented 

 spot above, near the tip, terminal margin with a piceous, 

 dentate band ; second segment with a distinct neck at 

 base; posterior margin abruptly and smoothly impressed ; 

 and with the remaining segments immaculate : tibiae, 

 posterior pairs spinous behind. 



