MONOGRAPH OP THE NORTH AMERICAN PROCTOTRVPID^. 329 



thorax Avith .a tjiooved central ridge, the pleura pubescent. Antennje 

 lOjoiutedj in the <J honey-yellow, with a G jointed cylindrical club, the 

 flagelluni one and two-thirds the length of the scape, the pedicel a little 

 more than half the length of the first funielar Joint, the second funiclar 

 joint cyathiforni, longer than the first; club joints subnionilif<n'ni, longer 

 than thick ; in the 9 black, the pedicel nearly as long aa tlie first funiclar 

 joint, the first, one-third longer than the second, the second cylindric, 

 the riagellar joints a little longer than thick, the last conical, longer 

 than the preceding. Tegube rufo piceous. Wings hyaline. Abdomen 

 polished, about as long as tlie head and thorax united, much depressed, 

 wi(''ist toward the apex and obtusely rounded, narrowed toward the 

 bast; petiole longer than thick, finely rugose, with a V-shaped carinated 

 space above; second segment elongate, with 2 finely shagreened foveie 

 at base. 



Habitat. — Indiana, Canada, Western States, and Texas. 



Specimens ia National Museum and Coll. Ashmead. 



Isocybus canadensis Prov. 



Platygasier canadensis Prov., AtW., p. 181. 



Monocrita canadenain Aslmi., Can. Eiit., xix, p. 126; Cr. Syn. Hyni., p. 250. 



5. Length, 3"'". Black, minutely, closely, rugosely punctate; antenniB 

 and legs, except coxa*, brownish-yellow. The pedicel and second funiclar 

 joint are about equal, two thirds the length of the first funiclar joint, 

 the second funiclar joint being obliquely truncate at tip; club 0-jointed, 

 rather stout, the first two joints not longer than thick, the three fol- 

 lowing a little longer than thi(;k, the last a little longer than the penul- 

 timate. Thorax trilobed, minutely, rugosely punctate, the middle lobe 

 smoother anteriorly, the lobes posteriorly and the high convex scutellum 

 covered with a sparse fuscous pubescence. Mesopleura deeply im- 

 pressed or foveated at the middle, smooth, shining, except the piece 

 beneath the anterior wing, which is distinctly striated posteriorly. 

 Wings subfascous. Abdomen oblong oval, narrowed at base, the 

 petiole fluted, opaque, pubescent; body of abdomen smooth, polished, 

 the second segment at base with two foveolae, pubescent both above 

 and beneath. • w 



In the S the antennjE are usually wholly yellow, the second funiclar 

 joint being longer and thicker than the pedicel, the first small, subtri- 

 angular, not longer than thick, the club joints about twice as long as 

 thick, the last not quite twice as long as the penultimate. 



Habitat. — Ottawa, Canada. 



Types, S and $ , in Coll. Ashmead. 



Provancher described this species from the male sex alone, a type 

 specimen of which was kindly sent me by Mr. Harrington. 



The ftiscous streaks in the wings, resembling nervures, misled me 

 into describing it as a species of Monocrita before I had seen the type. 



