Fossorial ITgmenoptera of North America. 113 



On comparing the wings with those of C. Q-macuIatus, the neuration 

 appears much alike. They differ in havng much shorter and broader 

 interspaces, especially the rhomboidal second median, which is con- 

 siderably shorter in proportion. The species will be easily known by 

 its six spotted abdomen, and convex contracted basal abdominal ring, 

 giving a subpedunculated appearance to the abdomen, which is short 

 and broadly ovate. This with its small size and cubical 9 head and 

 short transverse % head, and coarsely punctured body, together with 

 the absence of the mesial raphe and submesial ridges, the short inter- 

 spaces of the wings, and swelled femora will easily separate it from its 

 allies. 



It structurally agrees well with C. crcesus from Cuba, which has 

 entirely yellow legs, both meso-scutellum and meta-scutellum yellow, 

 and eight fasciae on the abdomen, the first and fourth pairs of which 

 are united to form broad conspicuous bands, while the pubescence on 

 the orbits and clypeal region is of a deep golden color. Its neura- 

 tion approaches C. 6-maciihttus much more closely than 0. stirpicola. 



A specimen from Illinois has a conspicuous yellow band on the meso- 

 scutellum, an angular yellow spot on the flanks, behind the tubercle, 

 and the femora are more broadly tipped with yellow than in the other 

 specimens. 



Crabro scaber, Smith. 



Solenius scaber, St. Farg, et Brulle, Ann. Ent. Soc. France, iii, p. 715. (1834). 



St. Farg. H. N. Hym. iii. 123. (1845). 

 Crabro scaber, Smith, Cat. Hym. B. M. iv., p. 418. (1856). 



9 . Body coarsely punctured. Head long, cubical, being three- 

 quarters as long as broad, vertex broad convex ; ocelli arranged in a 

 slightly curved line, the anterior ocellus less than one-third as large as 

 the two others. A very fine silvery, and in some lights, golden pu- 

 bescence lines the orbits. Clypeal region silvery, clypeus golden, 

 broad and short, well carinated. Mandibles black, basal half pale 

 yellow. Lingua unusually long and deeply bilobate, pale testaceous ; 

 joints of both pairs of palpi a little longer and slenderer than usual. 

 Antennae rather stout, subclavate; scape cylindrical, entirely yellow, 

 basal joint of flagellum yellow, as also basal half of second joint, be- 

 coming fuscous towards the end ; remaining joints black. Prothorax 

 broad, continuously yellow, narrowly and deeply channelled ; front 

 edge being carinated and ending in an acute denticle; tubercle yellow; 

 meso-scutum with the mesial raphe and submesial ridges nearly obso- 

 lete, surface coarsely punctured. Scutelluni black, metas-cutellum 



PROCEEDINGS ENT. SOC. PHII.AJ>. MAT, 1866. 



