156 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



Genus HYPOSOTER Foerster. 



It is the opinion of the writer that the genotypes of the following 

 genera as established by H. L. Viereck * are all congeneric: 



Hyposoter Foerster, Eypothereutes Foerster, Ischnoscopus Foerster, 

 Ameloctonus Foerster, and Anilastus Foerster. Hyposoter, being the 

 oldest name by page preference, becomes the name to be used. 



HYPOSOTER INTERJECTUS, new species. 



Female. — Length approximately 5.5 mm. Black with close white 

 pubescence on the head, thorax, and abdomen; scape and pedicel 

 reddish-yellow; flagellum black; palpi, mandibles except their apices, 

 tegulae, front coxae and all trochanters, except the first joint of the 

 posterior pair, pale yellow or whitish; median coxae, fore and median 

 femorae and tibiae and the hind femorae reddish-yellow; hind coxae 

 black, the hind tibiae blackish at base and apex with the middle paler; 

 front and middle tarsi yellowish, their apices brown; hind tarsi very 

 dark brown or blackish, the base of first joint pale; abdomen with 

 the first segment, basal two-thirds and a narrow apical band of sec- 

 ond black; following segments more or less blackish on the median 

 dorsal portion; sides and venter reddish-yellow. 



Head and thorax closely punctate and opaque; antennae 36- 

 jointed in the type; anterior margin of the clypeus slightly rounded; 

 eyes distinctly but not deeply emarginate just above the antennae; 

 ocelli distant from the eye-margin a little more than the greatest 

 diameter of an ocellus, postocellar line not twice the lateral ocellar 

 line; propodeum in the type with a rather poorly defined areola 

 which is longer than wide and open behind; areolet of the front 

 wings with a short petiole, the recurrent nervure joining cubitus 

 behind the middle of the areolet; first abscissa of radius nearly half 

 as long as the second; subdiscoidal vein arising from the middle of 

 the second discoidal cell; nervellus of the hind wing slightly curved 

 but not at all angularly broken; first joint of the hind tarsi more 

 than twice as long as the second; last joint of the tarsi, not including 

 the claw, about equal to the fourth joint, claw distinctly pectinate; 

 longer of the hind tibial spurs very nearly two-thirds the length of 

 the first tarsal joint; abdomen dilated below from the third segment, 

 not strongly compressed, the ovipositor scarcely exserted beyond 

 the apex of the abdomen; spiracles of the second segment at the 

 middle; petiole with a distinct fossa laterally before the spiracle. 



Male. — Unknown. 



Type-locality . — Arc ola, Mississippi . 



Host. — Prodenia omithogalli. 



Type.— Oat. No. 18327, U.S.N.M. 



i Bulletin 83, U. S. National Museum, 1914. 



