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. 



PEMPHREDONINiE. 



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. Abdonlen with a distinct petiole; episternauli present 



Stigmus p. 689 



Abdomen without a petiole; episternauli wanting 



Spilomena p. 689 



3. Abdomen sessile Passalocoeus p. 689 



Abdomen petiolate Pemphredon p. 690 



