1(38 WILLIAM J. FOX. 



Washington ; Nevada. The specimen from the latter locality is 

 smallest and less coarsely sculptured. A 9 specimen from the first 

 mentioned locality I refer here with some doubt ; it resembles ad- 

 venus, but the clypeus is black and dentate laterally ; sculpture of 

 the dorsulum is coarser, that of the epimerum mesopleuralis sparser, 

 while that of the upper surface of middle segment tends to a rugged 

 rathei" than a ridged nature ; the markings are of a deeper yellow, 

 those on abdominal segments 2-6 heavier and not at all sinuate or 

 emarginate ; tips of femora yellowish, as well as mandibles except 

 tips. Length 10 mm. 



44. Crabro Provanoheri n. n. 



Thi/reopHS sinuatus Provanclier (neu Fabr.), Hyin. Quehec, p. 664, 9 • 

 9 . — Head finely and closely punctured, not striated on front and vertex, hut 

 more strongly punctured ; space between hind ocelli slightly less than that be- 

 tween them and the nearest eye-margin ; anterior margin of clypeus not dentate 

 laterally ; pronotum well ridged anteriorly, the lateral tooth strong and sharp ; 

 dorsulum with tolerably close and strong punctures; scutellura similarly punc- 

 tured ; mesopleurse with finer but sparser punctures, the episternal suture strongly 

 foveolate ; middle segment above with coarse, somewhat radiating ridges, which 

 terminate outwardly at a strong curved ridge, which bounds the upper surface, 

 posterior face transversely and less coarsely rugose, the lateral ridges well devel- 

 oped, sides except medially, striated. Black, including the scape except extreme 

 apex ; spots on mandibles medially, clyjieus, pronotum almost entirely, tubercles, 

 scutellum anteriorly, tips of femora and a spot beneath near the apex of fore and 

 medial pair, tibise except darker spot within, first joint of tarsi, and spots on the 

 abdomen as in cribrellifer, yellow; wings subhyaliue, darker at apex, nervures 

 and stigma dark testaceous. Length 12 mm. 



Toronto, Canada (Provancher) ; Jacksonville, Florida (Ashmead). 

 A Crabro sinuatus has been described from Europe, thus making it 

 necessary to change Provancher's name. This species will j^robably 

 prove to be the 9 of Gribrellifer. 



45. Crabro cribrellifer Pack. 



Thijreopus cribrellifer Packard, 1. c, p. 358, % . 

 Crnbro cribellifer (sic) Kohl, 1. c, p. 585. 

 %. — Head closely punctured, anteriorly most coarsely being stria to-punctate; 

 space between hind ocelli a little less than that between them and the nearest 

 eye-margin ; flagellum broadest basally, not so broad as in latipe.% the basal joint 

 with a bunch of white hairs beneath ; cheeks depressed, not produced posteriorly, 

 scarcely ridged beneath ; in-onotum strongly ridged anteriorly, the lateral tooth 

 well developed, acute ; dorsulum with distinct, tolerably well separated punctures, 

 closer and finer, however, than in latipes : epimerum mesopleuralis very sparsely 

 punctured, almost smooth, the episternal suture as well as that which separates 

 the epimerum from the mesosternum heavily defined and strongly foveolate : 

 middle segment above very coarsely rugose, the rugai forming irregular foveai. on 

 posterior face transverse, the lateral ridges very strong and extending to the upper 



