No. 22.] HYMENOPTERA OF CONNECTICUT. 323 



Theronia Holmgren. 

 °T. atalantae fulvescens Cresson. 



Length 6-12 mm. ; entirely stramineous, with yellowish trans- 

 parent wings; exserted portion of ovipositor shorter than the 

 abdomen. 



Parasitic on Scamhus conquisitor, a primary parasite of the 

 white-marked tussock moth (Hemerocampa leuc ostigma) ,.^nd a 

 tertiary parasite on the American tent-caterpillar {Malacosoma 

 americana), also a parasite on the gipsy moth (Forthetria dis- 

 par). 



T. melanocephala Brulle. 



Possibly parasitic on Scamhus pedalis, and a parasite on the 

 gipsy moth (Porthetria dispar) . Bred from (Eudamus) Epargy- 

 reus tifyrus by A. B. Champlain. Readily distinguished from 

 fulvescens by the head, which, as the name indicates, is black 

 in melanocephala. 



Portland, 10 August, 1913 (B. H. W.). 



Hymenoepimecis Viereck. 

 Epimecis Brulle. 

 °H. wilti (Cresson). 



This is a conspicuous species about 15 mm. long, with its 

 head, including antennae, almost entirely black; rest of body 

 stramineous to brownish stramineous, except the abdomen at 

 apex, where it is blackish, and sheaths of ovipositor, which are 

 blackish ; exserted portion of ovipositor approximately four-fifths 

 as long as the abdomen ; wings yellowish transparent, with a 

 fuscous border apically in the fore wings, and a median fuscous 

 band in the same extending from the anterior margin to the 

 posterior edge. 



Ichneumon Linnaeus. 

 Ephialfes Gravenhorst. 

 Wings transparent, colorless, or tinted with yellowish brown ; 

 head and thorax mostly black. 



Key to Species. 



I. Abdomen above entirely or mostly black 2 



Abdomen above mostly red; length 13-20 mm.; exserted 

 portion of ovipositor a little longer than body; fore and 



