256 ENTOMOLOGICAL NEWS. [June, 'oS 



middle, smooth, shining; dorsulum smooth, shining, with a few very 

 small punctures, a more or less distinct longitudinal furrow in middle ; 

 meso-pleurse smooth, shining, impunctate, suture rather strong; upper 

 surface of metathorax with some short, longitudinal striae at base; 

 furrow not strong, convexities shining, very finely striated; upper 

 and lower surface separated by a furrow ; posterior face on metathorax 

 with a triangular fovea at basal middle, bounded by ridges at the 

 sides, finely transversely striated ; meta-pleurse finely transversely stri- 

 ated'; legs normal, middle tibiae without spur ; first transverse cubital 

 received before middle of radial cell; abdomen smooth, shining, im- 

 punctate; pygidium broad, obtusely rounded at apex. Color shining 

 black ; spot on scape in front, line on pronotum, tubercles, scutellum 

 dark yellow; legs anterior trochanters and femora except a black 

 line reddish-yellow; anterior tibiae and tarsi, except a line behind, 

 middle femora except a broad line behind and a narrow one in front, 

 middle tibi?e except a line behind, middle tarsi, base of posterior tibiae 

 and a line beneath yellow; clypeus and thorax beneath with white 

 pubescence; wings hyaline, slightly dusky at apex, irridescent; ner- 

 vures and stigma dark brown. 



$ . Very much like 9- Furrow on front stronger, metathorax fur- 

 row stronger, scape and tubercles black. 



Habitat Florissant, Colorado, July 17, 1906 (Ckll.) $ and 

 9 ''flying around Ribcs ;"' 2 $ $ July 19, 1906 (Ckll.). 



The 9 runs near lentus Fox in Fox's table (Crabronidse of 

 N. Amer.) but differs as follows : clypeus without medial tooth ; 

 antennae more slender ; metathorax somewhat different ; tuber- 

 cles yellow ; posterior tibiae entirely yellow beneath, etc. May 

 be known at once from harrisii Pack, by the dark venation. 

 The $ runs to imprcssifrons Sm. but is not that species. 



Crabro ( Crossoceros} eriogoni n. sp. 



9 . Length about 5 mm. ; length of anterior wing 4 mm. Head 

 as wide as thorax, densely finely punctured; broad, smooth, low fur- 

 row from lateral ocelli to upper orbits ; ocelli in an equilateral tri- 

 angle; distance between hind ocelli a little greater than that to the 

 nearest eye margin ; furrow from anterior ocellus to facial basin ; facial 

 basin smooth, shining; antennae slender, very slightly subclavate, first 

 and second joints of flagellum subequal ; clypeus rounded anteriorly, 

 without teeth; middle carina wanting or almost so; pronotum very 

 slightly ridged anteriorly ; dorsulum finely densely punctured ; meso- 

 pleura finely striato-punctate; suture rather weak; in basal middle is 

 a large puncture; scutellum similar to dorsulum in sculpture; fur- 

 row of metathorax rather faint on upper surface, more distinct on 



