154 WILLIAM J. FOX. 



distinctly shorter than the following two united, about one-fourth longer than 

 the second joint ; lateral tooth of pronotum small and indistinct ; dorsulum com- 

 pactly punctui-ed or apparently strongly granulated ; scutellum with strong, dis- 

 tinct punctures ; mesopleurge strongly punctato-striate, the punctures most promi- 

 nent, the episternal suture scarcely foveolate ; middle segment above with tolerably 

 fine striations, posterior face sculptured somewhat similarly to the mesopleurse, 

 but more coarsely and the striae are less evident, sides delicately striated ; abdo- 

 men distinctly punctured, the first dorsal segment strongly so, the remaining 

 dorsal segments finely and closely ; second ventral rather strongly punctured, 

 sparsely in the middle. Black ; mandibles except outer margin and apex. scai>e, 

 two spots on pronotum almost touching internally, tubercles, line on metanotum, 

 extreme tips of fore and medial femora, tibiie except a line within, tarsi, either 

 entirely or in part, a long narrow mark on each side of dorsal abdominal segment 

 2, almost touching within, a small spot at each extreme side of segment 3, and a 

 band on segments 4 and 5, that on the fourth sometimes interrapted medially, as 

 are likewise the spots on segment 2 connected, yellow: head and thorax with 

 tolerably dense, grayish hair; wings subhyaline. Length 10 11 mm. 



•J, . — Head rather coarsely punctured ; space between hind ocelli much less than 

 that between them and nearest eye-margin ; first joint of flagellum much shorter 

 the combined length of the following two joints united, about one-fourth longer 

 than the second joint, four basal joints together about one-fourth longer than the 

 six terminal ones united : lateral tooth of pronotum stronger than in the 9 > the 

 dorsulum more coarsely sculptured ; middle segment above coarsely punctato- 

 striate, the sides more coarsely striated than in the other sex ; fore femora beneath 

 at base not produced; first two joints of medial tarsi not curved, only slightly 

 produced apically, the first joint distinctly longer than the thi-ee following united ; 

 abdomen punctured as in the 9 i colored and spotted the same, sometimes the 

 small spots on segment 3 of abdomen are drawn out and almost touch within, and 

 the lines on segment 2 are unusually united ; wings paler. Length 8 mm. 



Colorado ; Montana. 



26. Crabro iinbiitiis Fox. 



Cmbro iinbKtu.s Fox. Proc. Calif. Acad. (2), iv, p. 108, 9 • 

 9 . — Head finely punctured, but more distinctly so than in chrysarginus ; frontal 

 impressed line almost obsolete above ; ocelli forming a curved line, the space be- 

 tween the hind pair less than that between them and the nearest eye-margin: 

 first joint of rtagellum scarcely as long as the two following joints united ; pro- 

 notum strongly deutate at the sides ; doi-sulum with strong punctures, those on 

 posterior portion rather well separated, those of the scutellum even more so; 

 mesopleurse rather coarsely striato-punctate, the episternal suture not foveolate ; 

 middle segment rather coarsely striated, the sides delicately so; abdomen with 

 doi"sal segments 2 5 finely and closely punctured, the first segment strongly punc- 

 tured, the abdomen throughout much more distinctly punctured than in chrysar- 

 ginus. Black ; mandibles except apex and outer margin, scape, pedicellum more 

 or less, pronotum entirely, tubercles, episternum mesopleuralis more or less, scu- 

 tellum m part sometimes, a spot on each side just anterior to it, metanotum, fore 

 femora beneath and sometimes the apex of remaining pairs, tibise entirely or in 

 part, basal joints of tarsi, a peculiar, somewhat drepaniform spot on each side 

 of first dorsal abdominal segment, large wedge-shaped marks on second, some- 



