AMERICAN HYMENOPTERA. 183 



beneath, blackish above, with broad yellowish-white annulus above 

 middle; prothorax blackish anteriorly, the anterior margin pale yel- 

 low; maririns and sutures of thorax blackish, as well as scutellar 

 region and pleura centrally beneath ; scutellum yellow ; nietathorax 

 blackish at tip; wings hyaline; four anterior coxae yellowish beneath j 

 apices of posterior pair, tips of their femora, apical half of their tibiae 

 and tips of their tarsi black, basal half of their tibiic yellow; abdomen 

 opaque, base of first segment and apical margins of second and third 

 segments black and shining. Length % .30 inch. 



188. disparilis, Cress. Trans. Am. Ent. Soc. i, p. 307, 9 . 



Hub. — Connecticut. Dull ferruginous, with antennae, tips of pos- 

 terior femora, and disc of second and third abdominal segments black ; 

 abdomen short, robust, with pale annulus, the joints beyond strongly 

 compressed and dilated ; orbits, scutellum and four anterior coxaa 

 whitish; wings clear; abdomen strongly narrowed to base, closely 

 punctured. Length $ ,43 inch. 



189. russatus, Cress. Proc. Cal. Acad. LS77, $ . 



Hub. — Vancouver's Island. Entirely ferruginous, except sutures of 

 thorax and tips of antennae which are blackish ; joints of antennae short 

 and thick-set; wings subhyaline; three basal segments of abdomen 

 very densely sculptured, postpetiole flat. Length 9 --iO inch. 



190. semissis, Cress. Proc. Cal. Acad. 1877, 9. 



Ifab. — California. Entirely ferruginous, with slender antennae and 

 yellowish wings. Length 9 .-45 inch. 



191. scibilis, n. sp. 



%. — Elongate, narrow, subcylindrical, ferruginous, thorax shining; face, 

 clypeus, scape beneath, tegulse, scutellum, and four anterior coxaj and tro- 

 chanters yellow; antennae slender, dusky at tips; sutures of thorax, pleura 

 beneath, laieral regions of scutellum, and tips of posterior femora and of their 

 tibise, black ; wings subhyaline; legs slender; postpetiole narrow, shining, very 

 minutely aciculated, gastrocoeli subobsolete. Length .45 inch. 



JIab. — Illinois. 



192. mucronatus, Prov. Nat. Can. vii, p. 81, S . 



Jl(tb. — Can.. Va. A rather small, pale ferruginous species, with 

 subclavate abdomen, and easily recognized by the two acute spines 

 on metathorax ; the antennae above, lateral regions of scutellum, pos- 

 terior trochanters, extreme tips of their femora, tips of their tibijB, 

 and their tarsi, black; face, clypeus, annulus on antennae, scutellum 

 and four anterior coxae and trochanters, pale yellow; wings clear; 

 abdomen finely not closely punctured, slender at base, postpetiole nar- 

 row, polished, gastrocoeli obsolete. Length 'h .-40 — .15 inch. 



