NO. 2105. yEW SPECIES OF HYMENOPTERA—ROJfWER. 209 



Genus BLENNOCAMPA Hartig. 



BLENNOCAMPA ASSAMENSIS, new name. 



Blennocampa gracilicornis Rohwer, Rec. Indian Mue., vol. 8, 1913, p. 239 [not 

 (Selandria, BUnnocam pa) Rhadinoceraea gracilicornis iZaddach) Konow]. 



Genus PONTANIA Costa. 



PONTANIA AMENTIVORA, new species. 



From the sheath this species will form a new group which more 

 closely approaches Group 2 as defined by Marlatt in his Revision of 

 the North American Nematinae, but is readily distinct from that 

 species group inasmuch as the ventral portion of the sheath is tri- 

 lobed. 



Female. — Length, 4 mm. Labrum obtusely rounded; clypeus 

 with a shallow, narrow median emargination ; lobes broad and round ; 

 supraclypeal area triangular in outline, convex; supraclypeal foveae 

 represented by an oblique line; middle fovae elongate, obtusely 

 pointed below and rounded above; antennal foveae large, lateral 

 walls sloping and extending to the inner margins of the eyes ; ocellar 

 basin represented by an elongate fovae, with sloping walls, in front 

 of the anterior ocellus; antennal furrows complete; postocellar hne 

 decidedly longer than the ocellocular line ; postocellar area short, not 

 twice the diameter of a lateral ocellus, not sharply defined anteriorly 

 and laterally extending beyond the lateral margin of the lateral 

 ocelli; third antennal joint slightly shorter than the fourth; third 

 cubital cell one-fifth longer than its apical width, slightly wider 

 apicaUy than basally ; lower discoidal cell in the hind wings distinctly 

 shorter than the upper; nates broadly rounded apically; cerci promi- 

 nent, tapering; sheath as viewed from the side narrow, acuminate at 

 the apex; seen from beneath, the sheath, is trilobed, the concave por- 

 tion filled with fine pubescence; ventral view of the sheath super- 

 ficially resembles that of Diprion; claws cleft, the inner tooth dis- 

 tinctly shorter than the outer one. Black; clypeus, mandibles except 

 apices, labrum, supracylypeal area, cheeks, the apices of the coxae, 

 trochanters, the apices of the femora and the tibiae beneath yellowish 

 or yellowish white; wings hyaline, iridescent, venation dark brown. 



Falls Church, Virginia . Described from four females recorded under 

 Bureau of Entomology Number Hopk. U. S. 1012S, material collected, 

 and reared. May 13, 1913, by S. A. Rohwer. This species fives, in the 

 larval stage, in the pistillate catkins of a small species of Salix and 

 causes the destruction of the ovaries and the premature forming of 

 "cotton." It pupates with in a self-spun cocoon in the ground. 

 8102:2'— l'roc.N.ALvol.49— 15 14 



