<o. 2340. TRIBE EPHIALTINI OF THE ICHNEVMONINAE—CUSHMAN. |g35 



than to any other North American species. It can, however, be 

 easily distinguished from that species by its annulated hind tibiae, 

 white tibial spurs, and white palpi. The apparently best characters 

 for separating it from sanguineipes (Cresson) have been made use of 

 in the key, though the variation in both species with reference to all 

 but the fii-st character, which is comparative, makes the separation 

 difficult. 



Other characters of the male are: Clypeus broadly, shallowly 

 emarginate at apex; malar space haK as long as basal width of 

 mandible; inner margin of eye weakly sinuate; lower margin of 

 antennal foramen slightly below middle of eye ; front rather weakly 

 concave; antennae long, slightly attenuate at apex; notauli feeble; 

 propodeum without lateral ridges, rugulose punctate above, punctate 

 laterally, polished behind, spiracle very broadly oval. 



EPHIALTES (EPHIALTES) SANGUINEIPES (Cresson). 



Pimpla sanguineipes Cresson, Trans. Amer. Ent. Soc, vol. 4, 1872, p. 165, female. 



Type, Cat. No. 12277, U.S.N.M. 

 Pimpla (Pimpla) erijthropus Viereck, Ent. News, vol. 20, 1909, p. 291, female, 

 male. Tj'pe, Cat. No. 12275, U.S.N.M. 



Of the two characters mentioned by Viereck in his description of 

 erythropus, as distinguishing it from sanguineipes (the smootli, pol- 

 ished posterior face of the propodeum with its surrounding carina and 

 tiie color of the wings), the latter is obviously of no value, since the 

 wings of the type of sanguineipes are distinctly brown-stained. As 

 for the propodeal character, I know of no species in the genus in 

 whicli this is not subject to marked variation. The "carina" sur- 

 rounding the posterior polished area is formed hj the strengthening 

 and completion medially of one of the numerous transverse rugae. 

 In the type of sanguineipes the rugae cover most of the posterior 

 face of the propodeum and none is especially strong. In the type 

 of erythropus the reverse is true. But other specimens show inter- 

 mediate structure, and one of Viereck's paratype females has the 

 posterior face strongly rugose, while the ''carina" is unusually strong. 



The most striking characteristic of this species is > its sharply 

 contrasting, intensely black body and almost entirely bright red 

 legs. Other characters of value are : Clypeus broadly emarginate at 

 apex; malar space in female equal in length to base of mandible, 

 slightly shorter in male; face in female slightly wider than, in male 

 equal to, vertex; diameter of lateral ocellus much shorter than 

 ocell-ocular line, the latter nearly as long as postocellar line; frons 

 deeply concave up to anterior ocellus, usually more or less trans- 

 versel}^ rugulose, in male concavity less deep and not extending up 

 to ocellus; eyes only slightly sinuate within; notauli barely indi- 

 cated anteriorly; scutellum weakly convex, sub truncate at apex, 



