242 HENRY L. VIERECK. 



integument. Can be recognized at once by the median tarsi being 

 all yellow. 



9 . Head and thorax together 3 mm. long. Head dullish, with a few scattered 

 punctures, cheeks finely densely punctured; distance between posterior ocelli 

 less than than the distance between them and ne.are;st eye margin ; distance 

 between the eyes at base of clypeus about equal to the height of the clypeus; 

 clypeus nearly flat, the surface hidden by dense, appressed, silvery pubescence ; 

 first joint of the flagellum a little shorter than the second, joints of the flagellum 

 subequal. 



Thorax. — Pronotum dull, smooth and rounded ; dorsulum dull, apparently 

 impunctate ; mesopleura dull, with sparse minute punctures; s^^utellum dull, 

 apparently densely, very finely punctured ; postscutellum dull, finely roughened, 

 apparently impunctate; superior face of metathorax divided into two nearly 

 triangular spaces by a medial foveate line and separated from the adjacent areas 

 of the metathorax by foveate lines, posterior face dull, with a median cuneate 

 space, rugulose at base, smooth at apex; metapleura dull, impunctate: wings 

 clear tinged with brown, nervures and stigma very dark brown, transverse 

 median nervure distinctly basad of the basal nervure, recurrent nervure entering 

 the submarginal cell in the middle or nearly, transverse cubitus entering the 

 marginal cell distinctly basad of the middle. 



Abdomen lost. 



Black ; scape in front, four anterior tibipe except a line on the posterior face 

 and base of posterior tibiae yellow, tarsi of four anterior legs whitish, apical joints 

 and claws brownish, mandibles and posterior tibise partly castaneous. 



Type locality, Philadelphia (Frankford), Pennsylvania. Type, 

 Acad. Nat. Sci. Phila. June 23, 1898 (P. Nell). 



Steiiocrabro flavitrochantericus u. sp. 



9 . 5 mm. long. Head. — Dull, with fine, dense, indistinct punctures; distance 

 between posterior ocelli distinctly less than the distance between the lateral 

 ocellus and the nearest eye margin ; clypeus yellow, rather elevated in the mid- 

 dle, surface hidden by dense appressed silvery pubescence. 



Thorax. — Pronotum dull, with a transverse channel ; dorsulum dull, densely, 

 finely punctured ; mesopleura rather shining, closely, finely punctured; scutel- 

 lum sculptured much like the dorsulum ; superior face of the metathorax divided 

 into two nearly triangular spaces by a medial cuneate space, the base of which is 

 at the base of the metatho'-ax and the apex adjoining the foveate line separating 

 the superior from the posterior face, posterior face shining, with a deep median 

 sulcus; metapleura polished, impunctate; wings clear- tinged with brownish, 

 nervures and stigma nearly black ; transverse medial nervure distinctly basad 

 of the basal nervure, the recurrent nervure entering the submarginal cell basad 

 of the middle, transverse cubitus distinctly basad of the middle of the 

 marginal cell. 



Abdomen shining, minutely punctured, penultimate segment with dense not 

 sharply defined punctures, pygidium with coarse punctures. 



Black; scape except a black line on the posterior face, mandibles except at 

 apex, tubercles, line on pronotum, spot on the scutellum, trochanters, four an- 



