AMERICAN HYMENOPTERA. 379 



line ; coxae more or less silvery, the posterior pair black behind; abdo- 

 men highly polished, the petioles slender, as long as the thorax, very 

 slightly and gradually thickened to the tip ; second petiole with a stain 

 near base and apex, and a transverse stain on the middle of the remain- 

 ing segments (which are together not as long as the petioles and are 

 oval in form), blackish, more distinct laterally. Length 5 J lines; ex- 

 panse of wings 5 lines. 



One 9 specimen. This is the only species belonging to the genus 

 Colojytera that has as yet been discovered in America, the only two spe- 

 cies hitherto described having their habitat in Algeria and Gruinea. 



At the request of Dr. Lewis, this pretty little species is respect- 

 fully dedicated to Generg,l W. W. Wright, Chief Engineer of the Pa- 

 cific Railway, E. D. 



15. Priononyx Thomae, Fabr. 



Sphex Thomce, Fabr., Ent. Syst. ii, p. 199. 

 Pepsis ThomcE, Fabr. Syst. Piez. p. 209. 



Priononyx Thomce, Dahlb., Hym. Eur. i, p. 28. Saussure, Novara Exped. 

 Hym. p. 43. 

 One 5 specimen. 



16. Priononyx atrata, St. Farg. 



Sphex atrata, St. Farg., Hym. ili, p. 355. 



Priononyx atrata. Smith, Brit. Mus. Cat. Hym. iv, p. 266. 



One $ specimen. 



17. Larrada abdominalis. Say. 



Larra abdominalis. Say, West. Quart. Eep. ii, p. 77. (1823). 

 One 9 specimen. 



IS. Larra unicincta, Say. 



Stizus unicincta, Say, "West. Quart. Rep. ii, p. 77; Amer. Ent. pi. 2. 

 Larra unicincta, Cressou, Proc. Ent. Soc. Phil, iv, p. 472. Packard, ib. vi 

 p. 444. 

 Twelve % 9 specimens. 



19. Gorytes propinquus, n. sp. 



Female. — Black, polished, sericeous; face harrowed beneath, eyes 

 large; narrow frontal orbits, conical space beneath antennae, clypeus, 

 mandibles, except tips, and the palpi, pale yellowish ; clypeus convex, 

 its anterior margin subsinuate ; antennae slightly thickened toward the 

 tips, fulvous, the three or four apical joints black ; thorax impunctured ; 

 posterior margin of prothorax, tubercles, ling over the tegul^e, large 

 spot on each side of pleura beneath anterior wing, a small spot beneath 

 posterior wing, scutellum, except basal margin, postscutellum, tegulse, 

 and a large ovate spot on each side of metathorax, pale yellowish ; the 



