Fossorial ITymcnoptcra of North America. 377 



with fine stria) diverging from the mesial furrow, which is narrow but 

 distinct ; towards the flanks the stria) become transverse. Wings imma- 

 culate, clear, irridescent, costal nervure dark rufous, posterior nervules 

 testaceous, pterostigma dark. Fore femora reddish-yellow, stained with 

 brown externally ; middle femora dark brown, yellow beneath and at 

 tips ; hind femora entirely brown ; tibia) yellow, posterior pair tipped 

 with brown ; two anterior pairs of tarsi yellow, posterior ones dark. 



Abdomen cylindrical, very much rounded above, beneath convex, 

 nearly equalling the head and thorax together in length, longer, nar- 

 rower and slenderer than in B. impressi/rons, brown-black, edges of the 

 abdominal segments obscurely pale, more so than iu the species above 

 mentioned. 



Length of body, .26; head and thorax together, .13; abdomen, .13 

 inch. 



Differs from the species with which it has been compared in the de- 

 scription given above, in its shorter more transverse head and slenderer 

 body, in its fore femora being entirely yellow above; in the sculptur- 

 ing of the propodeum, where in B. impressi/rons it is entirely smooth. 

 The hind tibia) are much smoother, scarcely spinulated. It will also be 

 readily distinguished by the want of the pale testaceous posterior mar- 

 gin of the abdominal segments. 



Cambridge, Mass., (Coll. Harris). "June and August 15, on flowers." 

 Ilarr. MS. 



A Crabro pusillus has been described by Herrich-Schaeffer from 

 Germany. 



Blegharipus minimus, n. sp. 



% 9 • Head of the same proportion as in B. impressifrons, but the 

 vertex is a little fuller, orbits with a slight silvery pubescence, clypeal 

 region silvery, slightly contracted in width. Clypeus large and mesially 

 carinated, nearly two-thirds as long as broad. Mandibles long and slen- 

 der, curved, with a row above and beneath of coarse seta;, yellow, tips 

 piceous. Scape of antennae long, clavate, angular, yellow beneath, dark 

 brown above and on the sides, basal joint of flagellum larger than usual 

 in this group, terminal joint acutely obcouic ; palpi pale testaceous, 

 joints long and slender, cylindrical. 



Prothorax narrowly convexly crested in a transverse sense, square 

 but not angulated on the sides, with a continuous, linear, yellow stripe 

 above, surface of thorax minutely and sparsely punctured; tubercle 

 yellow; mesoscutellum and metascutellum highly polished, black. 



At base of propodeum is a row of minute fossa), a well-marked, semi- 



PUOCEEDINGS ENT. SOC. PIIILAD. FEBRUARY, 1S67. 



