252 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



transversely striate, propodeum otherwise coriaceous; legs stout; 

 hind coxae with a small, acute tooth beneath at apex ; wings reach- 

 ing to apex of abdomen; areolet nearly equilaterally pentagonal; 

 second intercubitus distinct though largely bullated; nervellus per- 

 pendicular; abdomen narrow fusiform; petiole strongly flattened; 

 postpetiole longitudinally rugidose; second tergite with gastrocoeli 

 shallow, distant from base, this and following tergites coriaceous, 

 subopaque, apical tergite polished; lunulae distinct on second and 

 third tergites, circular; ovipositor extending slightly beyond apex. 



Black; antennae slightly brownish; tegulae and mandibles 

 piceous; legs bright rufo-testaceous, apices of hind femur and tibia 

 and their tarsi largely fuscous; wings slightly blackish hyahne^ 

 venation blackish, wing base white. 



Male. — Length, 7 mm. ; antennae, 6 mm. 



Except for the usual sexual differences of more slender abdomen, 

 longer and more slender antennae, and lack of the coxal tooth, differs 

 in having the scape bro-vvnish beneath, and the clypeus, mandibles, 

 a larger or smaller spot on each side of face, and the tegulae basally 

 white. 



Host. — Peronea, species, on spruce and hemlock. 



Type locality. — Tongas National Forest, Alaska. 



Type.~C&t. No. 22849, U.S.N.M. 



Described from three females and five males reared at Washington, 

 District of Columbia, under Hopkins U. S. No. 13448, from material 

 collected by A. J. Jaenicke. 



Paratype h, female, is slightly larger than the type, while c, male,, 

 bears the same relation to the allotype. Paratype c also has the 

 facial spots much larger than those of the allotype. 



Genus ISCHNOPSIDEA Viereck. 



Ischnus Authors, not Gravenhorst. 



Only one North American species has been described in this genus— 

 namely, Ischnus americanus Ashmead — but it does not belong here 

 but to Atractodes. Nor do any species of the genus appear to have 

 been described under other generic names. Viereck ^ synonymized 

 Posocentrus Provancher with Ischnus presumably on the strength of a 

 misdetermination by iVshmead of the genotype, Posocentrus huarti 

 Provancher, in the United States National Museum. Under this 

 name are two females, one labeled ''Sh. 30.9.96" and the number 

 685, and the other "Sh. 7,10,95" and numbered apparently 358. 

 These represent a very distinct species, which I do not describe for 

 lack of information as to the source of the specimens. A male of 

 apparently the same species is from Cornwall, Idaho, collected 

 August 1, 1898, by C. V. Piper. 



> Bull. 83, U. S. Nat. Mus., 1914, p. 122. 



