AMERICAN IIYMENOPTERA. 181 



ferruginous; face, orbits, scutellum, pleura, generally two spots on 

 metathorax behind, and legs except posterior femora aud tips of their 

 tibiae, pale yellowish ; antennae long, black above, with more or less 

 distinct pale annulus, beneath pale. Length S .25 — .35 inch. 



17(1. libens, n. sp. 



%. — Small, shining, fulvo-ferruginous, vertex, occiput, pro- and raesothorax 

 black; antennae blackish above, fulvous beneath; head beneath antennae, 

 orbits broad on cheeks, collar, margins of prothorax, sometimes two short 

 lines on disc of mesothorax, tegulas, line beneath, scutellums, most of pleura, 

 two spots on metathorax behind and all the coxse, white or yellowish-white: 

 wings hyaline, iridescent; mesothorax sometimes more or less black. Length 

 .25— .30 inch. 



Ilab.—S. Y., N. J., 111. 



177. seminiger, Cress. Proc. Ent. Soc. Phil, iii, p. 1G7, $ . 



Ilab. — Can., Mass., N. Y., N. J., Pa., Va., 111. A robust ferrugin- 

 ous species, with metathorax, pleura and basal margin of abdominal 

 segments three and four more or less black j antennae robust, with 

 pale annulus J scutellum yellowish; wings pale fusco-hyaline; legs 

 ferruginous with coxae, trochanters and sometimes tips of posterior 

 femora within, black. Length 9 .45 inch. 



178. flebilis, n. sp. 



9- — Subrobust, dull ferruginous; pleura, flanks of metathorax, and posterior 

 coxse and trochanters, black; antennae rather slender, with white annulus, 

 basal joints of flagellum elongate, first joint of which is much longer than 

 second, before annulus the joints are ferruginous, beyond black; mesothorax 

 aud scutellum shining, finely punctured; wings subhyaline; legs slender, tips 

 of posterior tibiae and their tarsi dusky; abdomen with second and third 

 segments closely punctured, apical segments smooth and polished, postpetiole 

 aciculated, gastrocoeli small, moderately deep. Length .47 inch. 



Hal). — Canada. 



179. sequax, Cress. Proc. Cal. Acad. 1877. 



IJab. — Vancouver's Island. llGHGmhlea Jiebi lis, but the flagelluni is 

 entirely black. Length 9 .47 inch. 



180. hiemalus, Cress. Proc. Cal. Acad. 1877. 



Hub. — Aleutian Islands. A small ferruginous species with black 

 metathorax and pleura; antenn;c pale ferruginous, apical joints black ; 

 wings subhyaline. Length 9 -30 inch. 



181. subfulvus, Cress. Proc. Knt. Soc. Phil, iv, p. 258, 9 . 



Hdb. — Colorado. A rather small, pule ferruginous, shining species 

 with long and slender antennae, strongly attenuated at tips ; apical 

 margins of abdominal segments two to five narrowly black ; wings 

 ubhyalinc. Length 9 -35 — .40 inch. 



