504 PROCEEDINGS OF THE ACADEMY OF [1893. 



15. — Tachytes distinctus Sm. 



T. distinctus Sm., Cat. Brit. Mus. Hym. IV, 307. 9 . 

 '/'. elongatus Cr. , Tr. Am. Ent. Hoc. IV, p. 215. j> . 



Philadelphia (Smith) to Florida, westward to California. T. elon- 

 gatus, is according to Mr. Charles Robertson, who has taken it in 

 copulation with distinctus, the male of the latter. A 9 specimen in the 

 coll. of the U. S. National Museum from Arizona, has the abdomen 

 almost entirely red and the first four dorsal abdominal segments with 

 silvery pile at apex. 



16. — Tachytes sericatus Cress. 



T. sericatus Cress., ibid. p. 216. 9 $ • 



Texas, Georgia. 



17. — Tachytes rufofasciatus Cress. 



T. rufofasciatus Cress., ibid. p. 217. $ ; Fox, 1. c. p. 247. 9 $ • 



Georgia to Texas, Nebraska, California. 



18. — T. abdominalis .Say. 



Larra abdominalis Say, West. Quart. Rep. II, p. 77, 9 • 

 Larrada abdominalis Cr. , loc. cit. I, p. 379. 

 Tachytes abdominalis Cress., loc. cit. IV, p. 217. 



Arkansas (Say), Texas, Mexico. 



19 — Tachytes obscurus Cress. 



. obscurus Cress., 1. c. p. 217, 9 • 

 T. tcxanus Cress., ibid. p. 217. $ . 



District of Columbia to Mexico. T. ttxanus Cress., is the $ of 



this species. 



20. — Tachytes parvus Fox. 

 T. parvus Fox, 1. c. p. 249, $ . 



New Jersey (August). May be the $ of either of the two follow- 

 ing species. 



21. — Tachytes obductus Fox. 

 T. obductus Fox, 1. c. p. 250. 9 . 



Tennessee. 



22. — Tachytes mergus Fox. 

 T. mergus Fox, 1. c. p. 250. 9 • 



New Jersey (July). 



UNIDENTIFIED. 



Tachytes dives Lep. 



T. dives Lep., Hym. Ill, p. 247, 9 • 



"Carolina. Museum of M. Serville." 



TACHYSPHEX Kohl. 



Larrada Sm., Cat. Hym. Brit, Mus., p. IV, p. 274. 1856. 



Larra Patton, Proc. Bost. Soc. Nat, Hist. NX. p. 385; Cresson, "Synopsis," 

 p. 114. 



Tachysphex Kohl, Bed. But. Zeitschrift, XXVII. H. 1, 1883. 



