No. 22.] HYMENOPTERA OF CONNECTICUT. 275 



Porizon Fallen. 

 Thersilochus Holmgren. 



P. conotracheli Riley. 



Length 3.5 mm.; head and thorax mostly black; abdomen 

 mostly castaneous ; mandibles brownish, scape and pedicel light 

 brown ; flagel very dark brown ; legs brownish stramineous ; wings 

 clear with a brownish tinge, stigma brownish stramineous, veins 

 nearly concolorous with the stigma, the costa brown, the tegulae 

 stramineous ; first abdominal segment mostly black or blackish, 

 castaneous at and near the apex ; exserted portion of the oviposi- 

 tor nearly as long as the body, or approximately 3 mm. 



Parasitic on the plum curculio. 



New Haven, 14 May, 1904, on flowers of two species of 

 gooseberry (Ribes occidentalis and R. oxyacanthoides) (H. 

 L. V.). 



Porizonidea Viereck. 



Type: Porizon exhaustator (Fabricius). 



P. sp. 



New Haven, 4 July, 1905 (H. L. V.). 



Orthopelma Taschenberg. 



Proedrus Foerster. 



O. diastrophi Ashmead. 



Male and female : length 4 mm. ; ovipositor 1 .6 mm. ; head and 

 thorax black ; legs, including coxse, and abdomen, reddish ; base of 

 second dorsal segment and all sutures stramineous, the apex more 

 or less dusky, the petiole black ; antennae dark brown, their first, 

 second and third joints paler; clypeus, mandibles, and palpi 

 reddish ; wings hyaline, stigma and veins brown ; in the male the 

 first and second antennal joints reddish. 



Reared from galls of Diastrophus radicum in Waterbury. 



Plectiscidea Viereck. 



Plectiscus Authors, not Gravenhorst. 



Type: Plectiscus collaris Gravenhorst. 



Key to Species. 

 Clypeus strongly elevated and with a beak-like projection in 

 female; abdomen rugose, sessile, basal segment without a 



