AMERICAN HYMENOPTERA. 191 



abdominal segments, and spot on two apical segments yellowish-white ; 

 wings subhyaline. Length 9 .50 inch. 



15. robustus, Cress. Trans. Am. Ent. Soc. i, p. 298, $ . 



Hah. — Canada. A rather large, robust black species, easily recog- 

 nized by the second and third segments of abdomen being ferruginous, 

 yellowish at base; sides of face, annulus on antenn;x!, scutellum, most 

 of tibiae and narrow apical margins of fourth and following segments 

 of abdomen dull yellowish ; antennae slender ; wings yellowish-hyaline. 

 Length 9 .63 inch. 



IG. magnus, Cress. Proc. Ent. Soc. Phil, iii, p. 258, % . 



Hah. — Colorado. This is a large black species, with second and third 

 abdominal segments entirely pale ferruginous; wings fuscous; ventral 

 segments destitute of longitudinal fold. Length % .90 inch. 



17. rufizonatus, Cress. Proc. Ent. Soc. Phil, iii, p. 183, 9. 

 marianapolitanensis, Prov. Nat. Can. vii, p. 81, 9 . 



Hah. — Can., N. J. This is a deep black species with second 

 and third segments of abdomen entirely ferruginous; the antennae 

 have each a narrow pale annulus; wings subhyaline. Length 9 

 .57 inch. 



18. quebecensis, Prov. Nat. Can. vii, p. 77, % ., 



Hah. — Can., Col. A black species, with legs, except coxae, and 

 second and third abdominal .segments more or less ferruginous; face 

 and scutellum yellow; wings subhyaline; the specimen from Colorado 

 has the abdomen entirely black except a ferruginous band at base of 

 third segment ; the second and third ventral segments arc yellowish 

 and have each a more or less distinct longitudinal fold. Length % 

 ,60 inch. 



19. Taos, n. sp. 



9 . — Shining black ; upper anterior orbits, spot on middle of face, mandibles, 

 tegulse, abdominal segments two and three, ferruginous; face short; antennae 

 subrobust, with short thick-set joints, seven to fourteen pale yellowish ; scu- 

 tellum flat, pale yellowish; wings pale fusco-hyaline; legs robust, four anterior 

 knees, tibiae and tarsi, posterior tibiaj except tips and their tarsi, pale ferrugin- 

 ous; abdomen finely punctured, apical segments smooth and polished, post- 

 petiole rather broad, smooth, gastrocoeli obsolete. Length .47 inch. 



Hah. — New Mexico. 



20. electus, Cress. Trans. Am. Ent. Soc. i, p. 304, % . 



7u'fiifns, Prov. Nat. Can. vii, p. 79, S . 

 Ilab. — Can., Ct. This is black, with second, third and base of 

 fourth abdominal segments ferruginous; face, scape beneath, tegulao, 



