654 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [BuU. 



Key to Tribes. 



1. Mesepisternum without a dorsal plate; lateral dorsal angles 



of propodeum dentate or sharply angulate; second cubital 



cell petiolate nyssonini p. 655 



Mesepisternum with a dorsal and ventral plate; propodeum 

 not dentate 2 



2. Second pleural suture strongly angulate, mesepimeron there- 



fore much broader above; pronotum long, cephalo-caudal 

 length approximating same length of scutellum: slendv:r 



insects; second cubital cell petiolate alysonini p. 654 



Second pleural suture straight or nearly so, mesepimeron 

 therefore nearly parallel-sided; pronotum transverse; 

 stout species; second cubital cell sessile 3 



3. Sternauli wanting; mesepisternum with an oblique suture 



from below tegulas to prepectal carina gorytini p. 655 



Sternauli present; mesepisternum without an oblique suture 

 from below tegulae to prepectal carina hoplisini p. 656 



ALYSONINI. 



Only one genus of this tribe is known to occur within the 

 State. The habits of none of the Nearctic species belonging to 

 this tribe are known. 



Alyson Jurine. 



Slender species ; inner margins of the eyes subparallel, dorsal 

 margin of the clypeus irregularly convex, propodeum long, with 

 a sharply defined posterior face; first recurrent vein received by 

 the first cubital cell near the apex; the second recurrent vein 

 received by the second cubital cell near the apex; transverse 

 median vein distinctly basad of the basal vein. 



Key to Species. 



1. Females 2 



Males 3 



2. Thorax black oppositus 



Thorax red melleus 



3. Legs and clypeus black oppositus 



Legs partly fulvous, clypeus yellow melleus 



A. oppositus Say. 



Thompson, 11 July, 1905 (H. L. V.). Probably generally 

 distributed throughout the State. 



'A. melleus Say. 



o, 



