NORTH AMERICAN HYMENOPTERA. 195 



versely impressed before apical marpn ; middle segment polished, glabrous, the 

 enclosure distinct, but the impressed lines forming it become obscure toward base 

 and are not foveolate. the medial furrow perceptibly widened basally, lateral 

 ridges on posterior face distinct, the outer furrow absent: legs rather stout, the 

 medial and hind tibiaj strongly spinose ; wings subhyaline, iridescent, with a faint 

 fuscous cloud in the marginal cell, the recurrent vein received by the submar- 

 ginal cell a little beyond the middle ; dorsal abdominal segments 3-5 indistinctly 

 punctured, beneath the abdomen impunctate; pygidium as usual in the species 

 of this group. Black ; scape, except a line behind, pronotum, scutellum, apex of 

 fore and medial femora, tibia? and base of tarsi, bright yellow, the tarsi toward 

 apex somewhat testaceous; tips of mandibles and tegula? reddish testaceous, the 

 apex of the abdominal segments broadly testaceous; clypeus, inner orbits, cheeks, 

 and sides of thorax with silvery pubescence. Length 6-7 mm. 



'^ .—Anterior margin of clypeus with a small medial production, which is 

 truncate ; head more distinctly punctured than in the female, the space between 

 hind ocelli much less than that between them and the nearest eye-margin ; first 

 joint of flagellum longer than the second ; pronotum before apex with a trans- 

 verse impressed line, which is strongest toward the sides ; apical margin of the 

 abdominal segments broadly smooth, obscurely testaceous; fore and medial 

 femora reddish testaceous, with a dark line above, their apices yellow ; hind tibiie 

 with a dark spot near apex ; head and thorax above with distinct, pale fuscous 

 pubescence. Length 5 mm. 



Massachusetts; New York; Illinois (Algouquin, Nasou). The 

 species described by Packard as Bleph. mdellatm Say, I consider the 

 % of this species. It is doubtful if this is Say's species, as it differs 

 somewhat from the description, and if it were it would necessarily 

 have to fall, being the % of impre>sdfrons. 



82. Crabro Harriiigfoiiii n. sp. 



cp —Very close to ni<iricoruis, but much smaller; head indistinctly punctured, 

 including the front and vertex, glabrous; pronotum at the sides rounded, without 

 a prominence ; dorsulum rather indistinctly punctured, but more distinctly so 

 than the head ; middle segment with the enclosure not well marked, but more 

 distinct than in nigricornis, posterior face rugose apically, the medial furrow much 

 broadened above and pointed beneath, while in nujncornis this furrow is long and 

 fusiform, lateral ridge distinct and with a strong, outer, lateral furrow, which is 

 foveolate. Black, including the scape ; tips of mandibles and pygidium at tip, 

 reddish ; fore tibiaj in front, medial and fore tarsi, bases of hind tibise and tarsi 

 obscurely, yellowish testaceous. Length 4.5 mm. 



Ottawa, Canada (Harrington). 



83. Crabro nigricornis Prov. 



Blepharipns nujiimrnis Prov., Add. Hym. Quebec, p. 294. % . 

 5 .—Clypeus feebly carinated, its anterior margin in the middle crenulated ; 

 head finely punctured, the front much more strongly so ; space between the hind 

 ocelli a little less than that between them and the nearest eye-margin ; frontal 

 depression broad and polished, but not deep the line extending to the fore ocellus 

 distinct as usual ; first joint of flagellum fully one-quarter longer than the second ; 



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



