142 WILLIAM J. FOX. 



coarsely striated ; first joint of medial tarsi longer than the three following joints 

 united, the second joint as usual, strongly produced at apex ; colored and marked 

 like the 9 > ^^^ f*^'"^ femora, however, streaked with yellow posteriorly and red- 

 dish yellow, in front; spots on abdomen smaller and widely se])arated. Length 

 .5 mm. 



Canada (Harrington) ; New York ; Virginia. The width of the 

 space between eyes at base of clypeus, broad impression of pronotum, 

 distinctly striated scntelhnn, finer sculpture of dorsuluin, etc., dis- 

 tinguish this species from the preceding ones. 



9. Crabro parvulus Pack. 



Crabro parvidus Packard, 1. c, p. 108, 9 • 



9 . — Space between the eyes at base of clypeus but little less than the length 

 of flagellum joints 1 and 2 united, the space between \he hnid ocelli somewhat 

 greater than that between them and nearest eye-margin ; transverse furrow of 

 pronotum not veiy broad, but deep ; dorsulum finely striato-punctate : scutellura 

 sparsely punctured, the strise confined to the sides and posterior portion ; middle 

 segment above with strong, but not coarse, oblique striae, posterior face not dis- 

 tinctly enclosed, the surrounding ridge weak, with coarse transverse striations on 

 apical portion, sides delicately striated ; abdomen finely and closely punctured. 

 Black, the thorax except tubercles, rarely spotted ; spot on mandibles basally, 

 scajje in part, tubercles, spots on pronotum and metanotum rarely, tips of fore and 

 medial femora slightly, sometimes, line on tibise externally, and a spot at each 

 side of dorsal abdominal segments 2 5, all widely separated, yellowish ; tarsi tes- 

 taceous; wings subhyaline, uervures and stigma testaceous. Length 6-7 mm. 



% . — Occiput distijictly, though not very strongly margined posteriorly ; pro- 

 notum furrowed as in the 9 • dorsulum punctato-striate; scutellum striato-punc- 

 tate throughout; middle segment much more coarsely striated than in the 9i 

 particularly above and on the sides, the posterior face covered with coarse, ti'ans- 

 verse striae, distinctly enclosed, the surrounding ridge, however, less strongly 

 developed than in the % of cornuidfiis ; first joint of medial tarsi distinctly lon- 

 ger than the three following united, the second joint curved and produced as 

 usual ; mandibles, and much the greater part of medial and hind tibige black ; 

 thorax, except tubercles, very rarely maculated ; abdominal markings smaller than 

 in the 9 J fore femora with a line posteriorly, yellow. Length 5 6 mm. 



South Dakota (Aldrich) ; Colorado ; Nevada ; Mt. Hood, Oregon ; 

 Washington. Distinguished from corragatas by the differently fur- 

 rowed pronotum, finer sculpture of middle segment, color of tibise 

 and rarely maculated thorax. The head is more closely punctured 

 in the % in this species than in corrugatus and pcmper. 



10. Crabro pauper Pack. 



Crabro pauper Packard, 1. c, p. 95, % . 

 % . — Joints 1-3 of flagellum more strongly produced beneath than in the other 

 species of the group ; occiput distinctly, though not very strongly margined pos- 

 teriorly, less strongly than the cheeks; transverse furrow of ])ronotum broader 

 than in parvulnn, narrower than in corrwiatiia ; dorsulum and scutellum rather 



