North American Hymenoptera. ' 285 



dented spot behind : iergum with a purple reflection, less 

 obvious on the posterior segment ; punctures slightly im- 

 pressed, more obvious each side and on the terminal 

 segment ; terminal segment about equal to the preceding, 

 perfectly entire at tip : venter bronze: tarsi brown. 



Length less than one fourth of an inch. 



Differs from ventrahy Nob., which has the terminal 

 segment slightly longer than the preceding one and very 

 obtusely and slightly emarglnate at tip, and the thoracic 

 punctures are not sparse on the disk ; the sinudsurriy Nob. 

 has a deep and acute emargination at tip of the terminal 



segment of the tergum. 



% H. speculum. $ Green ; tergum and disk of the 



thorax impunctured. 



Inhabits Indiana. 



Body green, varied with purplish : antenntz, excepting 

 the first and second joints, blackish : head with discoidal 

 punctures, vertex and posterior margin impunctured : 

 thorax impunctured, polished, with an impressed, abbre- 

 viated line each side of the middle : metathorax with 



r 



discoidal punctures : wings fuliginous : tergum impunc- 

 tured, polished; terminal segment hardly half as long as 

 the preceding one, obsoletely punctured each side, at tip 

 obtusely emarglnate : tarsi pale honey-yellow : venter 



brassy. 



Len«-th less than three twentieths of an Inch. 



The smallest species I have yet met with in this 



country 



Pyria, Lepel. U Serv. 



P. tridens, L. &t P. Encyc. Meth- Chrysis carinata 

 Nob. Contrib. MacL Lyc- p. 82. 



