NORTH AMERICAN HYMENOPTERA. 229 



distinct pointed tooth; pits medium, contained in a deep groove, which ends on 



the lateral margin near the base of the segment; wings hyaline, basal half infus- 



cated; tarsi light brown; 9 mm. long. 



Montana and Washington Territory ; three specimens, all 9 ■ 

 Differs from cohaltina in having little or no pubescence on the head 



and thorax, in the pits and grooves, in the lateral apical teeth and by the 



larger punctures on abdomen being deeper. 



B. — Apical margin of abdomen 7iotched. 



Basin of face cross striated, lateral margins of third segment bisinuate, or nearly 

 straight. 



Abdomen blue or green, colored as the thorax or head perpulchra. 



Abdomen elegant metallic scarlet and gold (or cupreous), head and thorax blue 



and green faceta. 



Basin of face finely punctured, lateral margins of third segment distinctly angu- 

 lated, the angles a little produced dens$a. 



C'hrysis perpulchra Cresson, Proc. Ent. Soc. Phila. iv, 308, 1865 ; Norton^ 

 Trans. Am. Ent. Soc. vii, 241. 



Twenty-seven specimens in the collection from the localities : Canada, 

 Delaware, Xorth Carolina, Georgia, Colorado (the type), Utah, Nevada, 

 California, New Mexico, Montana, Wa.shington Territory and Vancouver's 

 Island. There are variations in color from deep blue and little green with 

 some purple, to emerald-green with no blue or purple. Some specimens 

 have the upward continuation of the carina strong, enclosing the anterior 

 ocellus ; others having this continuation almost wanting. The notch in 

 the middle of the apical margin of third segment varies in size and 

 depth, and the lateral margins are in some specimens straight, in others 

 slightly sinuate; length from (1-8 mm. 



C^hrysis taceta n. sp. — Hejid and thorax blue with green reflections, closely 

 covered with equal punctures; basin of face striated, on each side covered with 

 white pubescence; carina extending upwards and almost surrounding the anterior 

 ocellus. On each side of the occiput above and behind and touching the eye, a 

 rounded, strongly convex, smooth space, blue, and two others similar, but smaller, 

 and each with a brassy and green reflection, just behind and touching the poste- 

 rior ocelli ; abdomen golden and cupreous, with elegant ruby reflections, in great 

 contrast to the thorax, a faint green reflection at the base of the first segment and 

 the apical margin beyond the pits, green; sutures black, shining, when exposed: 

 the punctures are as large as those of the thorax, but less dense, except on the 

 immediate dorsum : apical mnrgiu of third segment deeply notched in the middle, 

 on each side of the notch the margin is pointed ; lateral margins very broadly but 

 slightly sinuate or arched inwardly; pits medium, close, contained in a strong 

 groove, which runs parallel to the lateral margins and ends near the base of the 

 segment; wings hyaline, very slightly infuscated on a part of the radial cellule: 

 tarsi fuscous; 4.5 mm. long. J (?). 



