, AMERICAN HYMENOPTERA. 75 



Wings violaceous hyaline, sometimes yellowish ; stigma large, black ; 

 costa pale. 



$ . The female has the third and fourth articles of antennse en- 

 larged at apex ; basal articles tipped with coarse hairs resembling 

 minute spines within. 



Var. 9 . Wings hyaline, at base smoky. 



Var. 9 . Basal two-thirds of all the wings black, sub-obscure; their 

 apex hyaline. Norway, Me., (Camb. Mus.) 



Mass., Ct., N. Y., 111. 



A number of specimens taken June 29th, at Farmington, Conn., 

 on the leaves of the Clematis virginiana. 



Section 2 — {Trichiocampus), Hartig. 

 Antennae of the males not branched, the third article dilated at 

 base within, as in Section 1. 

 Europe. 



Section .3 — [Priophorus), Latr. 

 The third article of autennre of males, simple, without process 

 within ; the inner lobe of maxillae blunt. 

 Europe. 



First submarginal wing cell with two recurrent nervures. 

 27. PRISTIPHORA, Latr. 

 Pristiphora, Latr. Nouv. Diet., 1816-19. 

 Lepel, Mon. Tenth, SO-f. 

 "Westw. Ent. Ins. App. 

 Pteronus, Jurine, Fam. 3. 



Whu/it — One marginal and three submarginal cells, the first sub- 

 marginal large, and receiving two recurrent nesvures, second small 

 and quadrate; lanceolate cell petiolate; under wings with two middle 

 cells. 



Antennse nine articulate ; the third, fourth and fifth of nearly equal 

 length, simple, pubescent in the males, shorter and glabrous in the 

 females. Mandibles slightly dentate. Remainder as in Nematus. 

 Stephens remarks that this genus seems to occupy an intermediate 

 space between Cladius and Nematus, nearly agreeing in the neuration 

 of the wings with the former and in the form of the antennae with the 

 latter. In certain species of N'rmntns, the dividing nervure between 

 the first and second submarginal cells is quite indistinct, and can only 

 be seen by holding them up to the light. Mr. Walsh remarks that in 



