342 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 58. 



spiracle long oval to broad oval depending on size and sex; basal 

 lobe of front claw rather small. 



In size this species varies from 8.5 mm, to 15 mm. in females and 

 5mm. to 14 mm. in males, 



Disirihution. — Cresson's type came from Hudson Bay Territory. 

 In the National Museum are specimens from Nevada, Utah, Califor- 

 nia, Colorado, and New Mexico, Its distribution is apparently 

 northern extending south along the high altitudes of mountain 

 ridges. 



Hosts. — Malacosoma fragilis (New Mexico); Autographa califor- 

 nica (Colorado), 



EPHIALTES (ITOPLECTIS) EVETRIAE (Viereck). 



Itoph'ctis evetriac Viekeck, Proc. U. S. Nat. Mus., vol. 44, 191.3 (April), p. 565, 



male. Tyi^e, Cat. No. 15294, U.S.N.M. 

 Itoplectis plesia Rohwer, Proc. Ent. Soc. Wash., vol. 15, 1913 (January 22, igM), 



p. 182, female. Type, Cat. No. 17063, U.S.N.M, 



Discussion based on type and paratypes of evetriae, type of plesia, 

 and five others of each sex. 



Rohwer's species is simply the female of Viereck's reared from a 

 larger host and differing from females reared from the type host, 

 Evetria taxifolieUa , only in size and the variant characters, such as 

 longer propodeal spiracle, which accompany larger size throughout 

 the genus. 



This species differs from all other species of the subgenus, and 

 resembles Epliialtes in lacking the lobes on the front claws in the 

 female. In all other respects, however, it agrees with Itoplectis. 

 From all other species of Uoplectis it differs in the form of the head 

 with its ver}^ broad and strongly rounded temples, 



Clypeus truncate at apex; malar space less than half as long as 

 basal width of mandible; eyes rather broadly emarginate; face 

 broader than vertex in both sexes; antennae slender, slightly 

 attenuate at base; the lower margins of their foramina slightly above 

 middle of eye; front rather shallowly concave, polished with some 

 punctures medially; notauli obsolete; propodeum very short and 

 declivous but strongly ridged laterally, nearly the whole dorsal 

 surface polished, lateral surface weakly punctate, spiracle round to 

 broadly oval. 



All of the specimens are from hosts in two genera, those from the 

 smaller host being about 6 mm. long and those from the larger host 

 about 10 mm. long. 



This is a western species, the types of evetriae being from Califor- 

 nia and that of plesia from Montana, while other specimens are from 

 Oregon and Montana. 



