238 E. T. CRESSON. 



cheeks sometimes black beneath ; clypeus sparsely and finely punctured ; tip 

 of antennae as in cultus ; yellow band in front of prothorax always distinct; 

 mesothorax varies from entirely black to almost entirely ferruginous; scutel- 

 ium generally black with a yellow spot on each side, sometimes black im- 

 maculate, sometimes almost entirely yellow; metathorax pubescent ferrugi- 

 nous, without yellow spot on each side; pleura black or ferruginous, with yel- 

 low spot beneath tegulae; abdomen varies as in J. Length .45 inch. 



Thirteen specimens. (Belfrage; Boll.) A very variable species. 

 The clypeus is not so broadly truncate at tip as that of cultus, which 

 is a larger, darker colored and more strongly sericeous species. 



Odynerus ductus, n. sp. 



9 . — Ferruginous, coarsely and confluently punctured ; spot at base of each 

 antenna, and large mark covering vertex, extending to occiput, black ; clypeus 

 flattened, longitudinally rugulose, apex truncate; sometimes the black on ver- 

 tex is confluent with the spot at base of each antenna, leaving a subcordate 

 ferruginous spot on middle of the front; antennae black, scape ferruginous; 

 anterior margin of prothorax sometimes yellowish ; mesothorax entirely black; 

 posterior margin of scutellum narrowly black; postseutellum yellow; meta- 

 thorax black, very broadly and deeply excavated behind, lateral angles promi- 

 nent, subserrate and ferruginous above, posterior face shining, obliquely 

 striated; pleura black with a large yellow-ferruginous spot beneath tegulfe; 

 tegulae ferruginous, pupilled with fuscous; wings fusco-hyaline, fuscous along 

 costa and in marginal cell; legs uniformly ferruginous; abdomen subseri- 

 ceous; first segment smooth, impunctured, subopaque, ferruginous, Wase ab- 

 rupt, more or less of basal middle extending in a gradually attenuated line to 

 apical margin, black, apical margin yellow, suddenly dilated on each side; 

 second segment shining, very sparsely punctured at base, the punctures be- 

 coming more close to apex, before which they are deep and coarse, black, with 

 a large ferruginous blotch on each side, apical margin narrowly yellow; third 

 and fourth segments closely and coarsely punctured, black, apical margin nar- 

 rowly yellow; apex ferruginous; apical margin of second and third segments 

 strongly reflexed ; venter mostly ferruginous. Length .45 — .50 inch. 



% . — Smaller, more strongly sericeous; head black, spot above base of an- 

 tennae, anterior orbits as far up as emargi nation of eyes and clypeus yellow ; 

 line behind eyes, labrum and mandibles ferruginous; scape yellow in front, 

 apical joint of flagellum long, narrow, curved, rufo-piceous; tibiae more or less 

 yellowish; disk of first abdominal segment broadly black, ferruginous blotch 

 on each side of second segment much reduced. Length .40 inch. 



Five specimens. (Belfrage.) This is allied to evectus in general 

 appearance, but may be separated at once by the strongly reflexed 

 apical margin of second and third abdominal segments. 



Odynerus fusus, n. sp. 



9- — Coarsely, confluently punctured; head black; cheeks, paler above, 

 and a stain across the front, ferruginous; spot above base of antennae, anterior 

 orbits as far up as emargination of eyes, broad upper margin of clypeus and 

 spot at base of mandibles, yellow; remainder of clypeus, labrum and mandi- 

 bles ferruginous; clypeus broad, flattened, sparsely punctured, truncate at tip; 



