No. 22.] HYMENOPTERA OF CONNECTICUT. 211 



body ; abdomen reddish, its second dorsal segment with a median 

 embossed area not attaining the apex and the sides of which form 

 aY. 



Wallingford, 15 June, 1913 (W. E. B.). 

 °A. charus (Riley). 

 Bred from Chrysobothris femorata. 



ALYSIID^. 



The length and attachment of the mandibles in this group are 

 something astonishing; when closed, their tips do not meet or 

 overlap, as is the rule in almost all other Hymenoptera ; when 

 open, they are turned out somewhat like hands with the palms 

 turned out and up. According to our present knowledge of the 

 parasitology of this family, its attacks are confined almost exclu- 

 sively to dipterous larvae. 



Key to Genera. 



1. Fore wings with two submarginal cells, first transverse cu- 



bitus always present; eyes not hairy; postscutel without a 

 more or less perfect spine; first abdominal segment longer 

 than broad; first branch of marginal vein distinct; second 



submarginal cell remote from stigma 2 



Fore wings with three submarginal cells or with only two, 

 but then without a first transverse cubitus; winged or 

 with imperfect wings 3 



2. Abdomen linear, longer than head and thorax, slightly com- 



pressed only at apex in female; marginal vein forming a 



regular curve 4 



Abdomen oblong or ovate, not longer than head and thorax 



Dacnusa p. 213 



3. First submarginal cell separated from second 5 



First submarginal cell confluent with second. .. .Synaldis p. 214 



4. Head extending above lateral ocelli; notauli not meeting 



posteriorly Rricoelinius p.212 



Head not extending above lateral ocelli; notauli meeting 

 posteriorly Coelinidea p. 212 



5. First transverse cubital vein shorter than second branch of 



marginal vein 6 



First transverse cubital vein as long as or longer than second 

 branch of marginal vein; first submarginal cell separated 

 from first discoidal; fourth joint of antennae not longer 

 than third; second abdominal segment smooth and with- 

 out a transverse line; propodeum not carinate; furrow of 

 ', mesopleura distinct, rugose or carinate; subdiscoidal vein 



