NO. 2334. NORTH AMERICAN ICHNEUMON-FLIES— CUSHMAN. 265 



cent for its entire length to the pro-mesonotal suture, tegulae, hu- 

 meral angle of pronotum, subalar spot, and meso-metapleural suture 

 white or whitish; antennae black; front and middle legs pale testa- 

 ceous, their coxae, trochanters and tarsi white, the last reddish at 

 apex; hind coxae and femur testaceous, trochanter stramineous, tibia 

 stramineous with apex reddish below and fuscous above, tarsal joints 

 white, fuscous at apices, the last two joints entirely fuscous; wings 

 hyaline. 



Type locality. — Virginia shore of Potomac River, near Plummer's 

 Island, Maryland. 



OtTier locality. — Georgetown, District of Columbia. 



Type.— Cat. No. 22856, U.S.N.M. 



Described from five females, four reared by H. L. Viereck from an 

 aphid gall (Hamamelistes spinosus Shimer?) on witch-hazel (Hama- 

 melis virginiana Linnaeus) at the type locality, and one captured by 

 H. H. Smith at Georgetown, District of Columbia. 



Some of the paratypes have the anterior corners of the scutellum 

 and the mesopleura and metapleura below and sides of propodeum 

 more or less reddish, while in h and c the corners of the scutellum have 

 a distinct whitish spot. The Georgetown specimen (paratype d) is 

 considerably larger, being, with the much distended abdomen 13 mm. 

 in length. 



PHTHORIMA SULCICLYPEUS, new species. 



Differs from extensor Cushman principally as follows : 



Length, 7 mm.; abdomen, 4.5 mm.; antennae (broken); 



Vertex shining, punctate; malar space fully as long as basal 

 width of mandible and with a distinct furrow extending from eye to 

 dorsal articulation of mandible; clypeus polished, inflexed from near 

 base, the apical slope with a deep median furrow, emarginate at apex, 

 thorax similar in sculpture, though perhaps less strongly sculptured, 

 and with the metapleurum with simple, sparse punctuation; poste- 

 rior face of pronotum steeply precipitous; areolet petiolate; nervulus 

 weakly post-f ureal; nervellus weakly broken far below middle; 

 compression of abdomen not embracing second tergite, which is 

 fully two-thirds as wide at base as long and strongly scupltured over 

 most of its surface; first tergite not wider at base than at apex and 

 about two-thirds as wide at apex as long. 



Black with the same white markings on head and thorax and in 

 addition with the lower cheeks, the sides of scutellum, postscutellum 

 and lower part of mesopleurum also white; hind tibia reddish fuscous 

 at base, white in middle, fuscous at apex, tarsus fuscous except at 

 extreme base of basal joint. 



Type locality. — ^Mount Washington, New Hampshire. 



Type.—Qai. No. 22857, U.S.N.M. 



One female specimen. 



