North American Hymenoptera. 



385 



OdyneruS; Latr. 



1. O. quadrisectus. Black; trunk before and behind, 

 tergum before and a band, white. 



Inhab. United States. 



Body black, punctured : head with a small spot above 

 the interval of the antennae, line on the basal joint of the 

 antennae, superior lateral margin of the clypeus and slight 

 spot on base of the mandibles obscure white : thorax^ a 

 bi-lobed band on the anterior margin, spot beneath the 

 wing, triangular spot each side on the scutel, transverse 

 line behind the scutel, behind that again on each side is a 

 very large triangular spot extending down almost to the 

 origin of the abdomen, white ; edge of the posterior 

 declivity of the raeta«,horax with a slight bifid, transverse, 

 denticulated crest : wings dark violaceous : tergum^ first 

 segment white, with a dorsal, triangular, lobated black spot 

 communicating with the black anterior declivity ; second 



an 



an 



f^ 



Length over seven tenths of an inch* 



This is much like the quadridens, Linn, which is a 

 true OpYNERUS, but it is destitute of the metathoracic 

 spines of that species, and besides other difierences it has 

 a band on the second abdominal segment. This latter 

 character not being very obvious may readily have been 

 overlooked by Fabricius. 



The male differs but little from the female ; my speci- 

 mens have two additional white spots on the anterior 

 portion of the nasus. 



ocul 



<? 



ments and two points on the second segment, yellow. 



VOL. I. PART IV. 



50 



