AMERICAN HYMENOPTERA. 195 



§?. — Abdomen convex or subconvex, the segments not unusually constricted at base; 

 head 7nore or less buccate. 

 Body and wings 6/jte-black, immaculate; antennae black. ..6. atrociernleus. 

 Body black, immaculate. 



Wings uniformly dark fuliginous; antennae orange-yellow. 



Postpetiole elevated and subpyramidal before apex 8. Brullei. 



Postpetiole not elevated, bicarinate before apex 7. obsidianator. 



Wings yellow, smoky on apical margins; antennae black; postpetiole not 



elevated before apex 9. margiuipeniiis. 



Body black, more or less marked with fulvous or ferruginous. 

 Abdomen entirely black; head, pro- and mesothorax, and sometimes scu- 

 tellum and disk of metathorax fulvo-ferruginous...l2. aiistrinns. 

 Abdomen black, second segment with broad ferruginous band. ..10. atrox. 



Abdomen black, apical half fulvo-ferruginous 11. apicalis. 



Abdomen black, basal segments more or less fulvo-ferruginous. 

 Wings fuliginous. 



Thorax black beneath 14. occideiltalis. 



Thorax entirely fulvo-ferruginous 13. uubilipcuuis. 



Wings yellow, apical margins fuliginous. 



Antennae yellow, black at tips 15. qnebeeeusis. 



Antennae black, scape yellow beneath 16. Bolteri. 



Abdomen entirely ferrug'nous, except base of first segment. 



Posterior legs entirely black 17. C'opei. 



Posterior tibiae and tarsi fulvo-ferruginous 18. canadensis. 



Body entirely* fulvous or ferruginous. 

 Wings dark fuscous. 



Postpetiole elevated and subpyramidal before apex 19. Rileyi. 



Postpetiole not elevated, rather depressed 21. buc'catus. 



Wings yellow, apical margins smoky 20. nicllosns. 



Wings yellow, a large spot at tip and triangular mark at apex of externo- 

 medial cell, violaceous-black 22. elegans. 



1. fulvipes, Cress. Trans. Am. Ent. Soc. ii, p. 93, % . 



ohsidianator, Prov. (not Brull6) Nat. Can. vi, p. 335, % . 

 Ilah. — Me., N. H. Black; labrum, knees, tibiae and tarsi yellow; 

 wings fuliginous, with an aineous reflection ; the % has the anterior 

 legs except coxae entirely yellow. Length % $ .60 — .65 inch. 



2. Edwardsii, Cre.ss. Proc. Cal. Acad. Nat. Sci. 1877. 



Hah. — Vancouver's Island. Black ; face, antennae beneath, tegulae, 

 scutellum and abdomen, except black spot on disc of segments two 

 to five, fulvo-ferruginous; legs yellow, coxae black; wings fuliginous, 

 with an aineous reflection. Length % .72 inch. 



3. fascipennis, n. sp. 



9 .—Ferruginous; antennae, posterior legs, except coxae and base of their 

 tibiae, and two apical segments of abdomen, black; face, clypeus, scape be- 

 neath, and basal third of posterior tibiae, yellowish; wings bright yellow, a 

 broad band a little before the middle and a broader one at tip, blackish; 



