MONOORAPFI OF THE NORTH AMERICAN I'ROCTOTRYPID.E 2o3 



in 9 toriniiiiitin^ in a 4 jointed club, the scape slnuU'i, pedicel cyathi- 

 forin, first tiiniclar joint small; in i with a (J-jointed tilitoiin clnh, the 

 joints slij^iitly pedicellate, oval, tlie last Ion;; conical; the first tnniclar 

 joint ahont twice as long as thick, the second stonter, obliquely truncate 

 at tip and curved. 



Tiiorax short, ovoid, convex; prothorax very short; inesonotuni with 

 distinct but deli«*ate furrows; scutelluiu convex; nietatliorax short. 



Front wings pubescent, ciliated, the subniarginal vein ending in a 

 knob, the basal nervure distinct, and with a distinct basal cell. 



Abdomen ovate, convex, slightly shorter and narrower than the 

 thorax; first segment small, the second very large, the third and fol- 

 lowing very short. 



Legs clavate, the tibial spurs weak, the basal joint of hind tarsi twice 

 the length of the second. 



The two species in our fauna may be thus distiuguislie*!: 



Legs black, the bead anil thorax microscopically shagreened. 



First and second abdominal scffnieiits not striated, the latter hairy at base. 



M. xiGKii'Es Ashm. 

 Legs brownish-yellow, the head and thorax smooth, iiiii>nnctured. 



First abdominal segment and the second at bade striated, not hairy. 



M. CARINATA, sp. UOV. 



Monocrita uigripes Ashni. 

 Bnll. No. 1, Col. Biol. Assoc., p. 8, 1890. 



S. Length, 1.80""". Black, subopaque, with a fine, granulated, or 

 shagreened sculpture; the face above the insertion of the antenniB 

 with some transverse acic^ilations. Antenuie lO-jointed, black, the 

 rtagellum about twice the length of the scape, pedicel twice as long as 

 thick, narrowed at base, the second joint minute, the third, slightly 

 swollen outwardly, the following joints very slightly longer than wide, 

 truncate at tips and rounded oil" at base, or cup-shaped, connected by 

 a very short pedicel. Parapsidal grooves distinct, converging and 

 almost meeting posteriorly. Scutellum high convex, with a deep, 

 transverse depressi«)n across the base. ^lesopleura smooth, polished, 

 with a curved impression across the disk; metapleura densely covered 

 with a griseous pubescence; the metathorax and petiole more sparsely 

 pubescent. Legs black, the knees slightly, anterior legs beneath, and 

 all the tarsi, more or less piceous, or reddish. Abdomen highly polished, 

 oblong oval, as long as the head and thorax together, the petiole not 

 longer than wide, the second segment occupying fully three-fourths of 

 its length, smooth, the following segments exceedingly short and about 

 equal in length. Wings hyaline, pubescent, the submargiual and basal 

 veins distinct, the former knobbed at tip. 



HabitA'i Greeley, Colo. 



Tyije in Cull. Ashmead. 



Nothing is known of the habits of this species, which was obtained 

 from H. F. Wickliam. 



