664 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



sides much thickened and raised. Abdomen shorter than the rest 

 of the body, narrow at base, broad near the tip. The posterior tibiae 

 much thickened. 



" New Haven, Conn., July 15th. 



" The elongate head and clavate abdomen give this species a very 

 peculiar appearance." 



Lindenius LePeletier. 



But one species of this interesting little genus has been found 

 in Connecticut. 



L. errans (Fox). 



Clypeus and scape posteriorly black ; hind tibiae yellow at the 

 base only; ocelli in a low triangle; the convexities of the dorsal 

 aspect of the propodeum smooth and polished ; cheeks unarmed. 



Rockville, 23 August, 1905 (H. L. V.). 



Rhopalum Kirby. 



This genus, like the preceding, is represented by only one 

 species within the State. Pygidium of the female narrow and 

 excavated for its entire length. Flagellum of the male dentate 

 beneath. 



R. pedicellatum Packard. 



Abdomen black, four anterior legs banded with black. 



This species was recorded from Connecticut by Packard, and 

 has been taken at New Haven, 8 June, 1896 (W. E. B.). 



Solenius LePeletier. 

 This is the Crabroninae of Ashmead. For reasons of this 

 change of names see the remarks under the genus Crabro (p. 



669). 



Key to Subgenera. 



1. Anterior margin of clypeus in middle produced into a strong 



truncate lobe; pygidium narrowly channeled 2 



Anterior margin of clypeus rounded or dentate, never with a 

 strong median truncate portion 4 



2. Ocelli in an equilateral triangle Clytochrysus p. 665 



Ocelli in a low triangle 3 



3. Abdomen coarsely punctate as are also head and thorax; 



flagellum of male simple; fore tarsi slightly flattened . . 



Solenius (s. str.) p. 665 

 Abdomen rather finely punctate as are also head and thorax; 

 flagellum of male with basal joints emarginate; tore tarsi 

 strongly flattened Ectemnius p. 666 



