NORTH AMERICAN HYMENOPTERA. 



197 



wings and sculpture of metathorax will separate this species from 

 ater. 



85. Crabro cinctipes Prov. 



Blepharipus ciudipes Provancher, Fauu. Ent. Can. ii, 667, % . 

 5 .—Clypeus well cariuated, the produced medial portion subtruncate ; head 

 with tolerably fine, distinct, punctures, finer on cheeks and stronger on front ; 

 ocelli forming a lower triangle than in ater. the space between the hind pair but 

 little, if anything, less than that between them and the nearest eye-margin, the 

 depressions in which the ocelli are situated not so well marked as in ater ; frontal 

 depression and impressed line as in that species ; antennse somewhat shorter, the 

 first joint of flagellum not quite one-quarter longer than the second ; pronotum 

 smaller than in ater, and with the dorsulum somewhat more strongly punctured 

 than the vertex ; mesopleuraJ with punctuation about similar to that of the vertex ; 

 lines forming the enclosure and the longitudinal furrow of middle segment wide 

 and deep, the enclosed smooth areas consequently small ; bounding the enclosure 

 laterally is a narrow, smooth space, between which and the sides there is a de- 

 pression or furrow, which is rugose, the posterior face with coarse, transverse 

 rugai, and outside of the lateral ridges a strongly foveolate furrow runs: wings 

 sul)hyaline, iridescent, the apical half darkest, nervures and stigma black ; first 

 two dorsal segments glabrous, impunctate. the remaining microscopically punc- 

 tured, the fifth most strongly, pygidium convex basally, excavated toward apex. 

 Black ; mandibles at apex, tegulffi and apex of abdomen, reddish testaceous ; tarsi 

 testaceous ; base of hind tibise, obscurely, yellow ; clypeus with dense, silvery 

 pubescence, that on the cheeks and thorax, on sides and beneath, sparse, legs with 

 a silvery sericeous pile. Length 7 mm. 



-^ .—Clypeus distinctly carinated. its anterior margin armed with three strong 

 prominences, the middle one of which is largest ; space between hind ocelli a 

 little less than that between them and the nearest eye-margin ; punctuation of 

 dorsulum and scutellum feebler than in the ? ; middle segment about as in the 

 9 , except that the smooth areas within the enclosure are smaller and indistinct ; 

 joints 2-4 of anterior tarsi, 1-3 of medial tarsi, basal half of joints 2 4 of hind 

 tarsi and their tibite at base, obscurely, yellowish. Length 6.5 mm. 



Canada (Harrington). The greater space between hind ocelli, 

 sculpture of metathorax, form of clypeus and color of legs in % 

 will distinguish this species from C. ater and nigror. 



86. Crabro ater Cress. 



Crahro ater Cresson, Proc. Ent. Soc. Phila., iv, p. 477, ? . 



Blepharipm ater Packard, ibid, vi, p. 374, 9 . 

 ^ ._Clypeus distinctly carinated, its fore margin rounded out medially ; head 

 with distinct, tolerably fine punctures, finer on cheeks and stronger on front ; 

 ocelli in an equilateral triangle, situated in strong depressions, the space between 

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

 frontal depression wide and distinct, glabrous, the line extending to the fore 

 ocellus strong; first joint of flagellum about one-quarter longer than the second ; 

 pronotum convex above, impressed medially, rounded laterally, transversely de- 

 pressed before apical margin, and like the greater part of the thorax is punctured 

 similarly to tlie vertex; mesopleuraj more finely and sparsely punctured ; middle 



TRANS. AM. ENT. SOC. XXII. JUNE. 1895. 



