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



For an account of the habits of our two species see Peckham, 

 Bull. 2, Wisconsin Geol. and Nat. Hist. Surv., 1898, pp. 88-98. 



Astata Latreille. 



Key to Species. 



Abdomen black unicolor 



Abdomen red bicolor 



A. unicolor Say. 



Length about 10 mm. ; third antennal joint longer than 

 fourth ; mesoscutum with small, well separated punctures ; dorsal 

 aspect of propodeum obliquely striato-reticulate ; wings hyaline, 

 fuscous apically. 



A. bicolor Say. 



Length about 9 mm. ; third antennal joint but very little longer 

 than fourth; dorsal aspect of propodeum reticulate; wings 

 hyaline. 



Both of the above species have been recorded from the State 

 but no definite locality is known for either. 



Pemphredonin^e. 



As treated here this subfamily includes genera which have 

 heretofore been widely separated. 



Key to Tribes. 



Eyes small, their inner margins subparallel or converging to 

 clypeus; head usually quadrate or subquadrate, well de- 

 veloped behind eyes; species shining; episternauli present 

 except in Spilomena; usually nest in wood pemphredonini p. 688 



Eyes large, their inner margins converging to vertex; head 

 subtransverse, scarcely developed behind eyes; species 

 opaque; episternauli wanting; nest in sand. . .miscophini p. 691 



PEMPHREDONINI. 

 Key to Genera. 



1. Anterior wings with only one recurrent vein 2 



Anterior wings with two recurrent veins 3 



2. Abdomen with a distinct petiole; episternauli present.... 



Stigmus p. 689 



Abdomen without a petiole; episternauli wanting 



Spilomena p. 689 



3. Abdomen sessile Passalocceus p. 689 



Abdomen petiolate Pemphredon p. 690 



