1893.] NATURAL SCIENCES OF PHILADELPHIA. 501 



Legs, except apex of tarsi, black; hind tarsi rather strong spinose. 



pepticus. 



10 — Abdomen in part red 11 



Abdomen entirely black fulviventris var. 



11 — Two apical joints of the antenna' narrow and elongate, much nar- 

 rower than joints 9-11, which are visibly broadened .fulviventris. 

 Two apical joints of the antennae somewhat spatulate, broader 

 than the two preceding joints spatulatus. 



1. — Tachytes validus Cress. 



T. validus Cress.. Tr. Am. Ent. Soc. IV, p. 216. 9 $ 



T. breviventris Patt., Proc. Bost. Soe. Nat. Hist. XX. p. 392. 



Texas; Illinois (Robertson). 



2. — Tachytes mandibularis Patt. 



T. mandibulars Patt., ibid., p. 394, 9 $ . 



Connecticut to Florida; Nebraska, Montana. 



3. — Tachytes harpax Patt. 



T. harpax Patt,, ibid., p. 395. 9 $ . 



Vermont to New Jersey; So. Dakota. 



4. — Tachytes calcaratus Fox. 



T. calcaratus Fox, Tr. Amer. Ent. Sue. XIX, p. 239, 9 $ . 



New Jersey (in August) and Florida; Montana (?). 

 5. — Tachytes exornatus n. sp. 



$ . — Anterior margin of the clypeus strongly rounded- out medi- 

 ally, with one large, blunt, lateral tooth; third joint of antenna? 

 about equal to the fourth, possibly a little longer; basal joiuts of 

 flagellum tolerably well rounded-out, but not so strongly as in the $ 

 of cafcaraius; space between the eyes at the top greater than the length 

 ef antennal joints 2 and 3 united; pubescence of the front and clyp- 

 eus golden; dorsulum and scutellum very closely and indistinctly 

 punctured; impressed medial line on metanotum well marked; tibia? 

 and tarsi spinose ; longer spur of hind tibiae decidedly shorter than 

 the first hind tarsal joint; emargination of eighth ventral plate small ; 

 black; scape, teg u he, legs (except coxae, trochanters and the fore and 

 medial femora above), and a transverse band on the abdominal seg- 

 ments above and beneath, reddish; wings yellow, the apical margins 

 broadly violaceous; the thorax densely clothed with grayish-golden 

 pubescence. Length 17 mm. 



Las Cruces, N. Mexico, August 16th (T. D. A. Cockerell.) 



6. —Tachytes breviventris Cress. 



T. breviventris Cress., 1. c. p. 216, $ ; Fox, 1. c. p. 239. 9 $ . 



Texas and Massachusetts. 



