4 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 82 



beyond the middle, while its first joint is only a little longer than 

 thick and the legs are very stout, the hind femur being barely three 

 times as long as deep. In ctenuchae the flagellum is not thickened 

 beyond the middle, and its first joint is nearly twice as long as thick; 

 the legs are only moderately stout, with the hind femur nearly or 

 quite four times as long as deep. 



Female. — Length 13 mm. In structure very similar to heterocmiipae, 

 from the foregoing description of which it differs only as follows: 

 Antennae more than half as long as body, 40-jointed, rather strongly 

 tapering to apex, flagellar joints relatively longer, first joint nearly 

 twice as long as thick, joints beyond middle not broadened and less 

 distinctly flattened below: propodeum irregularly rugose all over, 

 only a little more finely so medially; postpetiole finely coriaceous, 

 the sculpture sometimes running into very fine striations but not 

 distinctly, longitudinally striate; tergites 2-4 much less distinctly 

 punctate. 



In color also the species is very similar to heterocampae^ but the 

 head is reddish only on anterior orbits, clypeus, and mandibles, the 

 last more piceous and the orbits not at all yellow; the scape below 

 and the flattened surface of the flagellum are not distinctly reddish, 

 and the antennal annulus is more reddish; the palpi are distinctly 

 fuscous; the thorax, except the white scutellum, is entirely black; 

 the tibiae are entirely ferruginous except that the hind tibia is black 

 at apex ; and the postpetiole and apical tergite are not yellow spotted. 



Host. — CtenucKa virginica Charpentier. 



Type locality. — Detroit, Me. 



Type.—U.^.'^.M. No. 44067. 



Remarks. — Described from three females, all reared from the above 

 host, two from type locality under Gipsy Moth Parasite Laboratory 

 No. 10098M5, on July 13 and 21, 1926, and one with no other data 

 than the host label. 



Only the holotype has complete antennae. 



Genus PROSCUS Holmgren 



PROSCUS WALSHIAE (Ashmead), new combination 



Phaeogenes walshiae Ashmead, Trans. Amer. Ent. Soc, vol. 23, p. 205, 1896, 



male and female. Type, U.S.N.M. No. 3306. 

 Phaeogenes (Centetertis) incptifrons Gahan, Proc. U. S. Nat. Mus., vol. 55, 



p. 113, 1919. Type, U.S.N.M. No. 21614. (New synonymy.) 



The distinct, though shallow, gastrocoeli exclude this species from 

 Centeterus, and the broad temples, deeply concave occiput, slender 

 form, and unarmed hind coxae of the female place it in Proscus. 



Since the introduction of the oriental fruit worm, Grapholitha 

 molesta (Busck), into the LTnited States, this species has become one 

 of the most important of the parasites of the pupa of that insect. 



