MONOGRAPH OF THE NORTH AMERICAN PROCTOTRYPlDiE. 215 



being; long", petioliform, liiieur, the tlireo basal segments longitudinally 

 striated, the striations on the third fainter than on the other two, smooth 

 laterally and at apex; rest of the abdomen smooth. 



Habitat. — Kansas, Illinois, and Xew Jersey. 



Type in Coll. Ashmead and Xational Museum. 



BARYCONUS Forst-r. 

 Hym. Stud., ii, p. 101 (1856). 



Head subquadrate or quadrate, roundedly emarginated posteriorly; 

 ocelli 3 in a triangle, the lateral very close to the eye; eyes large, 

 oval, pubescent. 



Antenna^, inserted just above the clypeus, 12-jointed iu both sexes, 

 in 9 terminating iu a G-jointed club, the last funiclar joint transverse; 

 in S long, filiform, the first flagellar joint longer than the third. 



Maxillary palpi 4-jointed; labial palpi 3-joiuted. 



Mandibles tridentate. 



Thorax ovoid, the prothorax not or scarcely visible from above; meso- 

 thorax with or without furrows; metathorax short, emarginate poste- 

 riorly, with delicate keels laterally. 



Front wings with a long marginal and a very long i)ostmarginal vein, 

 the marginal being usually twice as long as the stigmal, oblique, clavate, 

 sometimes a little curved; basal vein usually distinct, rarely subobso- 

 lete. 



Abdomen long, linear, or fusiform, and not so much narrowed at base 

 as in Caloteleia^ the basal segments in 9 with a horn at base extending 

 forward over the metathorax, sometimes reduced to an elevated convex 

 prominence. 



Legs long, the femora and tibiiB subclavate; the tibial spurs 1,1,1; 

 all tarsi slender, much longer than their tibiiX'. 



Forster's type of the genus appears never to have been described. 

 The genus is closely allied to CaloteJeia, but is readily se^iarated by the 

 longer marginal vein and the difference pointed out in the abdomen. 

 It is parasitic on the eggs of white tree crickets, Oecanthus. 



Baryconiis oecanthi, sp. nov. Riley. 



(I'l. IX, Fig. 2 9.) 



''(5 9. Length, 2.5 to 3""". Black, closely ^lunctate, subopaque and 

 sparsely covered with a sericeous down. Head quadrate ; eyes pubes- 

 cent; autemiie 12-jointed, black; in S filiform-submoniliform, the first 

 and second funicular joints elongate, about equal, thrice as long as 

 thick; third slightly shorter; fourth half the length of third; joints 

 beyond to the last, moniliform; the last fusiform, twice the length of 

 the penultimate; in 9 terminating in a long 0-jointed club. 



