MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPID.E. 425 



cyliiulriciil, joints 2 to C very giudually decreasing, the second, fully four 

 times as long as thick, the last, a little thicker than the preceding, 

 very little more than twice as long as thick; club 4-jointed, black, the 

 last joint ovate, a little longer and thicker than the preceding, the 

 others oval. Thorax obliquely narrowed before, the collar produced 

 into a little rounded neck. Scutellum with a curved impression at 

 base. Wings clear hyaline, strongly fringed, the uervures pale yellow- 

 ish. Hind coxpB large, oblong; all the legs very long, the trochanters 

 long, the femora and tibive long, clavate. Abdomen ovate, black, pol- 

 ished; the ijetiole twice as long as thick, tinted. 



Habitat. — District of Columbia and Virginia. 



Tyi^e in Coll. Ashmead. 



Diapria armata Ashm. 

 Cau. Ent., xx, p. 53. 



$. Length, 1.6°"". Polished black, impunctured, cheeks, collar, met- 

 athorax, and petiole, woolly; legs piceous- black, with the trochanters, 

 base of femora, tibite, and tarsi rufous. Antennae 12-jointed, black, 

 clavate, the club 4-jointed, incrassated, the last joint conic-ovate, stouter 

 and as long as the 3 preceding joints united ; first funiclar joiat a little 

 longer and slenderer than the pedicel, the following joints shorter, a 

 little longer than thick and very slightly widened at tips, the last 

 joint a little thicker than the preceding. Scutellum with a transverse 

 fovea at base connected with the lateral imj)ressed lines. Metathorax 

 with a very sharp, prominent, triangularly acute keel just back of the 

 postscutellum, the sides densely woolly or pubescent. Wings hyaline, 

 strongly fringed, with a streak across the wing below the stigma. 

 Abdomen ovate, i)olished black, the petiole a little longer than thick,, 

 fluted. 



Habitat. — Ottawa, Canada. 



Type in Coll. Ashmead. 



A single specimen received from Mr. W. Hague Harrington. 



Diapria colon Say. 



Pailms colon Say., Bost. Jour., i, 284; Lee. Edit., ii, p. 729. 

 Diapria colon Cress., Syn. Hym., p. 251. 



$ . Length, 1.1"'"'. Polished black, impunctate; cheeks behind,, 

 collar and metapleura woolly; legs black, sutures of trochanters, base 

 of tibia^, and the tarsi piceous or brown ; wings subhyaline, strongly 

 fringed, with a dusky streak below the stigma. Antenuaj 12-jointed, 

 terminating in a 4-jointed club, the last joint oblong, as long as thetwO' 

 preceding joints united, the first and second joints moniliform, the 

 first much smaller than the second, the tliird quadrate, wider. Scutel- 

 lum with a distinct fovea, the fovea itself with 2 punctures at bottom 

 and connected with impressed lines at the sides, which themselves are 

 connected with a transverse punctate line at the apex of the scutellum. 



