AMERICAN HYMENOPTERA. 147 



blue color; the face and clypeus are entirely white, as well as the 

 scape beneath, and in two specimens from Ga., the posterior femora 

 have a broad white stripe on outer side. The postpetiole has a white 

 spot on each side at tip, sometimes subobsolete or wanting. A single 

 9 from Va., has the body entirely of a brilliant steel-blue color, with 

 no pale markings excepting narrow, interrupted orbital lines and a dot 

 on each side of scutellum. Length % 9 .45 — .70 inch. 



24. pulcher, Brull6, Hym. p. 304. 



Hab. — Can., N. Y., La. This handsome species is closely allied to 

 cseruleua, but is more robust, the thorax and legs much more elabor- 

 ately ornamented with white, and the posterior coxse of 9 are destitute 

 of the pubescent scopa seen in cseruleus. Length % 9 -^^^ inch. 



25. navus, Say, Bost. Jour. Nat. Hist, i, p. 229. 



cinctipes, Prov. Nat. Can. vii, p. 51, 9 . 

 ITab. — Can., Pa., Md., 111. A rather small species, with a more 

 or less bluish tinge on the abdomen ; the orbits, spot on each side 

 of clypeus, palpi, annulus on antennae, collar, sutural line in front of 

 wings, a line on each side of scutellum, spot on four anterior coxae 

 beneath, all the trochanters, an annulus on the tibiae at base and 

 another on base of tarsi, all white; coxal scopa distinct; wings hya- 

 line. The male has the face, clypeus and all the coxae entirely white ; 

 flagellum entirely black. Length % 9 .40 — .45 inch. 



26. scelestus, Cress. Proc. Ent. Soc. Phil, iii, p. 148, 9 . 



Ilab. — Illinois. Only a single specimen of this distinct species 

 has been observed. It is easily distinguished by the short antennae, 

 uniform dark fuscous wings and smooth finely punctured abdomen. 

 The antennae have a white annulus; a spot on scutellum and. two spots 

 at tip of abdomen are the only pale markings of the body. The post- 

 petiole is smooth on the disc and punctured on the sides j coxal scopa 

 distinct. Length 9 .50 inch. 



27. caliginosus, Cress. Proc. Ent. Soc. Phil, iii, p. 144, 9 . 



Hub. — Col., 111. A dull black species, with white scutellum, broad 

 white annulus on antennae and fuliginous wings. The head is nar- 

 rowed towards the mouth. Length 9 .55 inch. 



28. histricus, Cress. Trans. Am. Ent. Soc. i, p. 294. S . 



ffab. — West Virginia. A large dull black species, with fuligi- 

 nous wings. Sides of face and of clypeus, annulus on antennae, 

 scape beneath, line before wings and scutellum whitish. Length % 

 .75 inch. 



