136 WILLIAM J. FOX. 



poi'tion of the clypeus is longer and narrower than in any of the 

 succeeding groups having the clypeus so shaped. In the male the 

 flagellum is not dentate or eraarginate beneath, the fore femora are 

 armed with a tooth beneath near the base, the fore tarsi are slightly 

 flattened, but not broadened, and the first joint of medial tarsi is 

 somewhat enlai'ged near the base, giving the joint a somewhat sinu- 

 ated appearance. 



1. Crabro cinctellus n. sp. 



9 . — Head strongly punctured, particularly on the front, the punctures closest 

 and finest behind the ocelli and on the cheeks ; pronotum very strongly developed, 

 larger by far than in any of the allied species and armed with a large tooth on 

 each side ; scutellum more striated than punctured ; middle segment above with 

 coarse, longitudinal striations, the posterior face with transverse ones, sides 

 coarsely, but more evenly striated, upper surface separated from the posterior face 

 by a transverse series of large fovete ; fore and medial femora somewhat angular 

 beneath near the base; first dorsal abdominal segment with tolerably strong, 

 separated punctures, those on segments 2-5 finer and more even, second ventral 

 in the middle with large, sparse punctures. Black ; scape, pedicellum, pronotum, 

 tubercles, episternum mesopleuralis more or less, sysmall spot above on epimerum 

 mesopleuralis sometimes absent (as are likewise spots on metapleurae, upper and 

 posterior surfaces of middle segment), scutellum with two dots, one on each side 

 just anterior to it, metanotum, hind coxae beneath, apex of trochanters, femora 

 except a black spot on upper surface of fore and medial femora at base and a dark 

 streak on posterior surface of hind pair, tibiae, tarsi (apical joints darker), a broad 

 band on dorsal abdominal segments 1-5, a spot on each side of the sixth, and 

 ventral segments 2-5, more or less, generally almost entirely, bright yellow ; pu- 

 bescence of face and clypeus with a golden tinge. Wings suhhyaline, with a 

 slight yellowish cast, the nervures and stigma pale testaceous. Length 9-10 mm. 



Nevada. Four specimens labeled cinctellas Cress., evidently a 



manuscript name. A handsome and striking species. 



2. Crabro interruptiis St. Farg. et Br. 



SoU'iiiiis intemtptas St. Farg. et BruUe, Ann. Soc. Ent. Fr. iii (1834), p. 716, J ■ 



Crabro confliientns Say, Bost. Journ. N. H. i, p. 376, 9 % . 



Crabro dubius Smith, Cat. Hym. Brit. Mus. iv, p. 417. 



Crabro conjluentus Smith, ibid. p. 420. 



Crabro interruptus Packard, Proc. Ent. Soc. Phila. vi. p. 74, % 9 ■ 

 9 • — Head cl^vered with coarse, separated, deep punctures, those between the 

 ocelli and occiput scarcely less coarse or closer than those of tlw front, the cheeks 

 also coai-sely punctured ; pronotum not remarkably large, the lateral tooth small ; 

 scutellum marked by large punctures in addition to the strise ; middle segment as 

 described in einctellm^. Abdomen with strong, separated punctures, but less coarse 

 than those of the head. Black ; scape, pedicellum, spots on pronotum narrowly 

 separated, tubercles, line on scutellum and metanotum, that on the former some- 

 times wanting, apex of femora, tibise (sometimes darker internally), tarsi (apical 

 joints darker), an elongate, narrow spot on each side of dorsal segments 1-4, that 

 on segment 1 more or less siuuated, and a shorter and broader spot on each side 



