32 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



hind coxae inclined to piceous; hind tibiae white with apices dark 

 fuscous, their tibiae fuscous. 



POLYSPHINCTA (ZATYPOTA) PONTIACI Viereck. 



Pohjsphincla pontiaci Viereck, Hym. Conu., 1917, p. 318, male. Type. — Conn. 

 Agr. Expt. Sta., New Haven, Conn. 



Discussion based on notes by S. A. Rohwer, who has examined 

 the type and only known specimen. 



Differs from theridii Howard in the indistinctly defined rhomboidal 

 areas of the tergites; in having the front and middle legs paler; the 

 apices of the middle tibiae and hind femora brownish; and the hind 

 tibia with a subbasal black annulus. 



POLYSPHINCTA (ZATYPOTA) NIGROCEPHALA (Davis). 



Clistopyga nigrocephala Davis, Trans. Amer. Ent. Soc, vol. 24, 1898, p. 369. 

 Type.— Acad. Nat. Sci. Phila. 



Female. — Length 4 mm., antennae 2.8 mm., ovipositor 0.3 mm. 



Discussion based on type, homotype, and one female. 



Head polished, temples rounded, eyes converging slightly toward 

 the mouth, barely emarginate; face slightly longer than wide; malar 

 space about half as long as basal width of mandible; postocellar and 

 ocell-ocular lines about equal and somewhat greater than diameter of 

 lateral ocellus; thorax minutely shagreened, mesopleura subpolished; 

 mesoscutum but little longer than wide, the prescutum before 

 notauli about one-fourth the total length of mesoscutum; median 

 carinae of propodeum ])resent, the apical carina obscurely defined; 

 abdomen short and broad, its sculpture the same as the thoracic, 

 subpolished at apex and apices of tergites; first tergite a half longer 

 than wide, its sides angulate at the spiracles, dorsal carinae obsolete 

 beyond summit, space between de]>ressed; tergites 1-4 with complete 

 well-defined apical furrows, all tergites beyond first transverse; 

 ovipositor very short, its exserted portion hardly half as long as first 

 tergite; nervellus straight (left wing) or broken very near bottom 

 (right wing) ; hind tarsus somewhat shorter than tibia, its basitarsus 

 about as long as next two joints together. 



Rufo-testaceous with head black and propodeum and abdomen 

 blackish, the latter marked with yellow; palpi, mandibles, and apex 

 of clypeus reddish; antennae b^o^^^l, pale beneath at base; meso- 

 scutum pale testaceous; scutellum stramineous; pronotum, meso- 

 pleura, metapleura rufo-testaceous, the first below and sterni infus- 

 cated; wing bases, tegulae, spot below, and posterior angle of pro- 

 notum white; metanotum and propodeum blackish as are also the 

 tergites, except that tergites 2-4 incline to yellowish toward base; 

 front and middle legs stramineous, the front pair somewhat paler, 

 coxae and trochanters of both pairs white; hind coxae testaceous, 

 whitish at apex, trochanters white, femora fusco-testaceous, whitish 



