KO. 2340. TRIBE EPUIALTINI OF THE ICHNEUMONINAE—CUSHMA^ 333 



key ^ to 17, where it agrees with neither instigator (Fabricius) nor 

 aegpytiaca (Schmiedeknecht). 



Female. — Length, 8 nun.; antennae, 7 inm.; ovipositor, 2.6 mm. 



Head rather broad behind eyes, the tejnples straight and not 

 sharply converging, sparsely, weakly punctate; frons weakly, trans- 

 versely striate; face with a mechan longitudinal ridge; clypeus trun- 

 cate at apex; malar space slightly longer than basal width of mandible. 

 Thorax shining; pronotum, mesopleura posteriorly and nietapleura 

 striate; mesopleura otherwise, mesoscutum and scutelium obscurely 

 punctate; propodeutn dorsally rugoso-punctate, posteriorly trans- 

 versely rugose, median carinae divergent; first tergite shallowly 

 concave at base; basal five tergites densely punctate with broad, 

 polished, subcallose apices; apical tergites subpolished; ovipositor 

 about half as long as abdomen. 



Brilliant black; this color embracing coxae, trochanters, antennae, 

 tegulae and base of costa; legs otherwise bright rufo testaceous; 

 wings fuscous, venation dark brown. 



Type locality. — Tuolumne Meadows, California, 8,600 feet. 



Type.— C&t. No. 22871, U. S. N. M. 



Described from two females collected by G. R. Pilate, the type on 

 August 15, 1916, and the paratype on August 8, 1916. 



The paratype is practically identical with the type, being very 

 slightly larger and having the ovipositor relatively slightly longer. 



EPHIALTES (EPHIALTES) PEDALIS (Cresson). 



Pimpla pedalis Cresson, Proc. Ent. Soc. Phila., vol. 4, 1865, p. 268, male. 

 Pimpla pedalis Walsh, Trans. St. Louis Acad. Sci., vol. 3, pt. 1, 1873, p. 132. 



female, male. 

 Pimplidea pedalis (Cresson) Viekeck, Bull. 83, U. S. Nat, Mus., 1914, p. 117. 

 Scambus (Pimplidea) pedalis Viereck, Hym. Conn., 1917, p. 320. 



Type.— Ac&d. Nat. Sci. Philadelphia, No. 1411. 



This species is among the most common of the Eastern EpMaltes. 

 Its usually large size, brilliant black color, and black hind tibiae and 

 tarsi without any trace of annulation will serve to distinguish it from 

 any other species. Its nearest relative appears to be the Alaskan 

 yaJcutatensis (Ashmead), this species resembling it in the slender 

 legs and the stuctm-e of the first tergite, but being distinct from it 

 in the obscurely annulated hind tibiae. Yalcutatensis is known only 

 in the male, and it is impossible, therefore, to compare the females 

 of the two species. In the female it differs from all the other species 

 of the subgenus in the formation of the front tibiae, these being not 

 at all swollen in the middle but slender and increasing gradually in 

 size from base to apex. 



Other characters of value are: Clypeus broadly, very shallowly 

 emarginate; malar space in female equal in length to basal width of 



1 Opusc. Irtm., f;isc. 13, 1906, p. 1022. 



