AET. 23 NEW AMERICAN ICHNEUMON-FLIES CUSHMAN 3 



strong to beyond middle; propodeum rugose, basal lateral areas 

 densely punctate, carinae very high, submucronate at apices of middle 

 lateral areas, areola barely half as long medially as broad, its anterior 

 margin straight, posterior margin concavely curved. Abdomen 

 coarsely punctate, that portion beyond the first tergite fusiform and 

 somewhat more than half as broad as long, first tergite rugose laterally, 

 post petiole punctate laterally, shining and more or less coriaceous 

 medially, with dorsal carinae extending beyond spiracles ; gastrocoeli 

 deep, rugose. 



Head and thorax black, abdomen entirely ferruginous; small lines 

 on upper posterior orbits; antennae and palpi black; wings fusco-hy- 

 aline with dark venation; legs ferruginous, coxae and trochanters 

 black, hind tibia at apex and tarsus fuscous, front tibia with a white 

 stripe anteriorly from base to apex. 



Male. — Differs from female in addition to the more slender abdomen 

 principally as follows: eyes slightly longer than breadth of vertex; 

 antennae (incomplete) ; scutellum flattened above, the carinae 

 reaching to apex ; areola hardly half as long medially as broad ; post- 

 petiole medially opaque coriaceous. In addition to the posterior 

 orbital markings there is a small white spot on the inner orbits at top 

 of face; legs, except ferruginous hind femur and apices of front and 

 middle femora and the white stripe on front tibia, black. 



Type-locality. — ^Lolo Trail, Bitter Root Mountains, Idaho. 



Allotype-locality. — Cedar Mountain, Moscow, Idaho. 



Type.— C&t. No. 27681, U.S.N.M. 



Three females, the type taken by C. V. Piper in July, 1902; one 

 taken at Olympia, Wash., June 2, 1897; and one from Santa Cruz 

 Mountains, Calif.; and one male (the allotype) taken June 24, 1920, 

 by M. C. Lane. 



Both paratype females have small white markings on the humeral 

 angles of the pronotum, and the California specimen has small 

 spots also on the frontal orbits. The latter also has the postpetiole 

 as in the male. 



Genus APAELETICUS Wesmael 



This genus has not heretofore been recognized in the North Ameri- 

 can fauna, though Bradley * has somewhat doubtfully referred to it 

 Platylahus thoracicus Cresson, erythropygus Provancher, and quadri- 

 carinatus Provancher which he excluded from Platylahus because of 

 their circular propodeal spiracles. This character is too variable in 

 the genus to exclude the three species from Platylahus, to which they 

 are hereby restored. Moreover, they lack the very peculiar female 

 abdominal conformation so characteristic of Apaeleticus. 



The following new species appears to be a true Apaeleticus. 



> Can. Ent., vol. 35, 1903. p. 275. 



