176 WILLIAM J. FOX. 



% . — Anteiiuaj shorter aud stouter than in the % of tPHnicilGssici : punctures of 

 dorsuhun well separated ; otherwise somewhat more coarsely sculptured than the 

 9 ; colored and marked the same, except that the fore femora are yellow heneatli, 

 and there is a dark spot on scape posteriorly, which is visible from the front ; 

 wings slightly darker aud without darker apical margins; tibial shield not much 

 longer than broad, brownish, with several sinuous, pale stripes, at base yellow ; 

 pronotum and first abdominal segment with or without spots. Length 8 mm. 



Illinois ; New York ; Pennsylvania ; Delaware. A slenderer 

 form than tenuiglo>isus. 



5.5. Crabro teniiiglossus Pnck. 



Cruhro teiniitilossd Packard. Proc. Ent. Soc. Phila., vi, p. 98, 9- 



Thi/reopKn discifer Packard, 1. c, p. 363. % . 



Thyreopns teniiiglonsKS Provancher, Add. Hym. Quebec, p. 292. 



Cnibro tenidglossiis Kohl, 1. c, p. 585. 

 9 . — Head finely .and closely punctured ; lateral iniiiressions of the vertex 

 broad and very shallow ; space between eyes beneath at base of clypeus about 

 equal to the length of the pedicellum and first joint of fiagellum united, at auy 

 rate not less ; lingua large, prominent, greatly lengthened ; i)ronotum not strongly 

 furrowed on each side anteriorly, the lateral teeth small, but distinct aud sharp ; 

 dorsulum and scutellum with rather coarse, compact punctures; mesopleur<e with 

 rather large, shallow, scattered iiunctures, and in addition with a fine striation ; 

 middle segment above with a large, hexagonal fovea in the middle and several 

 smaller ones on each side, the posterior face transversely rugose apically ; first 

 abdominal segment broad, slightly tumid at apex. Black, including the mandi- 

 bles ; scape, two sinuate spots on pronotum, sometimes broken into four dots, 

 tubercles, metanotum, tips of anterior and medial femora, tibije. except a black 

 spot on inner side of fore and medial pairs and a testaceous mark at apex of hind 

 pair, an elongated transverse sjiot on each side of dorsal abdominal segments 2 5, 

 and sometimes a lateral dot on the first segment yellow, the marks on segments 

 2 and 3 broadest, and that on segment 4 narrowest ; fore and medial tarsi testa- 

 ceous, hind pair blackish ; clypeus, inner orbits broadly, cheeks and thorax be- 

 neath with silveiy pubescence ; abdomen with a sericeous pile, more obvious on 

 segments; wings subhyaline, faintly iridescent, nervures and stigma pale testa- 

 ceous. Length 8 mm. 



•J, . — Eesembles the 9 • hiteral impressions of vertex stronger, but not deep ; 

 thorax more coarsely punctured, but essentially the same; medial tarsi rather 

 distinctly flattened ; tibial shield decidedly longer than broad, obtusely rounded 

 anteriorly and posteriorly, brownish, mottled with darker yellow at bast^ : colored 

 like the 9 > but the fore and middle femora are yellow beneath, and there is quite 

 a prominent yellow spot on each side of first abdominal segment ; mesosteruum 

 with tolerably long, dense, white hair beneath. Length 7-8 mm. 



Illinois; South Dakota (Aldrich); Ottawa (Harrington). A 

 much more robust form than C. tamidus, and is distinct in other 

 prominent characters. 



12. Group hilaris. 

 These species resemble those of the preceding group to some ex- 

 tent, but are ea.sily distinguished by the almost simple fore legs and 



