256 ENTOMOLOGICAL NEWS. [June, ’08 
middle, smooth, shining; dorsulum smooth, shining, with a few very 
small punctures, a more or less distinct longitudinal furrow in middle; 
meso-pleurz smooth, shining, impunctate, suture rather strong; upper 
surface of metathorax with some short, longitudinal strize 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-pleure finely transversely stri- 
ated; legs normal, middle tibiz 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 tibie and tarsi, except a line behind, 
middle femora except a broad line behind and a narrow one in front, 
middle tibiz except a line behind, middle tarsi, base of posterior tibize 
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. 
é. Very much like 9. Furrow on front stronger, metathorax fur- 
row stronger, scape and tubercles black. 
Habitat—Florissant, Colorado, July 17, 1906 (CkIl.). ¢ and 
2 “flying around Ribes;”’ 2 ¢ $ July 19, 1906 (CkIl.). 
The @ runs near Jentus Fox in Fox’s table (Crabronide of 
N. Amer.) but differs as follows: clypeus without medial tooth ; 
antennz more slender; metathorax somewhat different; tuber- 
cles yellow; posterior tibiz entirely yellow beneath, etc. May 
be known at once from harrisii Pack. by the dark venation. 
The ¢ runs to impressifrons 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; antenne 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- 
pleurz 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 
