No. 22.] HYMENOPTERA OF CONNECTICUT. 243 



the South American species as well as of some of the European 

 species have been partially worked out, and indicate that the 

 species belonging to this family are either parasites on the larvae 

 of Vespids, or hyperparasites of the Vespids, attacking the Dip- 

 terous parasites of the latter. 



Key to Genera. 



Second cubital cell petiolate, triangular in outline 



Lycogaster p. 243 

 Second cubital cell not petiolate or triangular in outline 



Trigonalys p. 243 



Lycogaster Schuckard. 



L. pullatus var. hollensis Melander and Brues. 

 Almost entirely black, with the subtegular tubercule yellow. 

 Length ii mm. 



New Haven, July 20, 1904 (W. E. B.). 



Trigonalys Westwood. 

 °T. sulcata Davis. 

 Black, marked with yellow ; scutellum yellow. Length 7 mm. 



T. (Tapinogonalos) pulchellus Cresson. 



Black, with whitish marks, excepting the abdomen and legs 

 which are largely yellowish, and the antennae which are black 

 except for a whitish annulus. 



ICHNEUMONID^. 



Key to Genera. 



1. Wings present 2 



Wings wanting Gelis p. 327 



2. Fore wings with first abscissa of cubitus present, first sub- 



marginal cell not confluent with first discoidal cell 3 



Fore wings with first abscissa of cubitus wanting, first sub- 

 marginal cell confluent with first discoidal cell 4 



3. Fore wings without transverse cubiti and with only one sub- 

 marginal cell, the latter open Praon p. 259 



Fore wings with two transverse cubiti and three submar- 

 ginal cells, the first and second closed Ephedrus p. 258 



4. Fore wings with two recurrent veins S 



Fore wings without recurrent veins or with only one recur- 

 rent vein Aphidius p. 259 



5. First abdominal segment usually straight in profile, its spira- 



cles placed at or before the middle; if, as is rarely the 



