260 On the Hymenoptcra of the Genus Allantus. 



Var. a. $ The first joint of antennaB white beneath ; 

 collar edged with white on three sides ; pleural band wide; 

 scutellum black. 



Var. b. (J Antennae stout ; spot on scutellum very mi- 

 nute or wanting ; posterior coxae black at base, and poste- 

 rior tibioB entirely black. 



Ilab. Farmington, Conn. 



Seventeen specimens examined. 



Sp. 46. A. obesus. Say. H. Cat. Undescribed. 

 Black; body stout; wings fasciate. (Long, about 0.35 

 ill. Ex. alar. 0.74 in.) 



$ Shining black; thorax wide ; abdomen short and stout; 

 head narrower than thorax, coarsely punctured ; vertex 

 surrounded by an oval ridge, inclosing the anterior ocellus ; 

 antennae moderate, third joint long ; ocelli pale ; face im- 

 maculate ; palpi piceous at tip ; clypeus moderately emar- 

 ginate ; thorax rough, immaculate ; two pale dots behind 

 scutellum ; legs yellow ; intermediate femora at tip above, 

 posterior coxae at base, apical half of femora and of tibiae, 

 and all the nails, black ; wings hyaline ; nervures dark 

 brown ; stigma inflated, black ; a broad, brownish fascia 

 upon superior pair, crossing the second and third sub- 

 marginal cellules. 



Hab. Massachusetts (H. Coll.). 



One specimen examined, of which the upper half of 

 abdomen is wantin*;. 



