MONOGRAPH OF THE NORTH AMI.RICAN PROCTOTRYPlDiE. 221 



OPISTHA1.ANTHA AhIiiii., gen. nov. 

 /?airt Ashm., MS. (Olim.). . . 



(Type, O. inelUprH ANhm.) 



Heatl transverse, the oceipiit and cheeks delicately margined; ocelli 

 3, triangularly arranged, the lateral close to the eye; eyes large, oval, 

 pubescent. 



Antennfe inserted at the clyi)eus, 12 Jointed in both sexes, in the 9 

 short, clavate, the club G-jointed, the last funiclar Joint very minute; in 

 S filiform, submonililbrm. 



Mandibles bidentate. 



Thorax short, ovoid, the prothorax not visible from above; mesono 

 turn with 2 delicate but distinct furrows; scutellum semicircular; post- 

 scutellum produced into a short, acute spine; metatnorax very short, 

 angles subacute. 



Front wings ciliated, the submarginal vein reaching the costa a little 

 before half the length of the wing; marginal vein short, not half the 

 length of the stigmal; postmarginal greatly lengthened; the stigmal 

 vein oblique, knobbed; basal vein and basal cell present. 



Abdomen oblong oval, the second and third segments the longest, 

 the third a little longer than the second. 



Legs slender, the tibial spurs 1, 1, 1, weak, the basal joint of hind 

 tarsi about 4 times as long as the second. 



In general appearance this genus closely resembles a Telenomid, but 

 the venation, carinated abdomen, and the spiued postscutellum readily 

 distinguish it. 



Oplsthacantba mellipes, sp. nov. 



:,..':: (Pl.ix,Fig.4, 90 '^ /; _ 



S 9 . Length, 1.40""". Black, subopaque, the punctuation so fine 

 as to be scarcely perceptible. Head transverse, broader than the 

 thorax. Eyes very large, i)ubescent, the space between them narrow. 

 Lateral ocelli close to the eye. Mandibles 3-dentate, brown. Antennae 

 12-jointed, brown-black, the scape yellow; in 9 clavate, pedicel small, 

 the first funiclar joint slightly longer than the pedicel, about twice as 

 long as thick; the second antl third moniliform, the fourth very minute; 

 the club large, the joints scarcely separable, transverse; in S fili- 

 form, the pedicel moniliform, the first and third funiclar joints about 

 equal, long-oval, the second small, the joints from the fourth to the 

 twelfth oval-moniliform, the last ovate, longer than the preceding. 

 Mesonotum with two nearly parallel furrows. Scutellum subconvex, 

 with a transverse line at base. Postscutellum armed with an acute 

 spine or thorn. Legs pale honey-yellow. Wings hyaline, the venation 

 pale brown; the basal nervure delicate, but distinct; the marginal, 

 about as long as the stigmal; the stigmal rather short, oblique, and 

 ending in a knob; postmarginal vein very long. Abdomen long-oval, 

 longer than the head and thorax together; black, with a brownish tinge 



