THE CANADIAN ENTOMOLOGIST. , 301 



NEW SPECIES OF COLLETES. 



BY iMYRON H. SWENK, UNIVERSITY OF NEBRASKA, LINCOLN. 



Colletes 'Vierecki, n. %\). — $ . Length, 11-12 mm. Shining black, 

 form stout, body almost bare. Clypeus slightly convex, not sulcate, 

 closely striato-punctate, sparsely clothed with short, pale pubescence. 

 Supraclypeal area convex, shining and impunctate medially, and with 

 crowded punctures on the margins. Face crowded with good sized punc- 

 tures, and with very short, erect, pale pubescence. Antennae black, the 



flagellum more or less dull brownish beneath, the scape deeply punctured, 

 joint 3 a shade shorter than 4, decidedly shorter than 5 and the following, 

 which are shorter than wide. Malar space practically lacking, at most a 

 mere line. Mandibles rufous beyond middle, tip very acute, notch large 

 and nearly one-fourth its length from tip. Labrum shining, concave, a 

 large, round, median excavation bounded on each side by a subtriangular 

 one, which occupies most of the remaining space, and is indistinctly 

 crossed by some weak ridges. Cheeks rather coarsely and closely punc- 

 tured except around the orbits, their pubescence very sparse and whitish. 

 Vertex shining and polished, anteriorly depressed by elongated fovese, 

 finely and sparsely double punctured, its pubescence fairly long, pale and 

 black intermixed, the former predominating posteriorly, the latter between 

 ocelli. 



Prothoracic spine distinct, sharp, broadly subtriangular. Pubescence 

 of a broad anterior thoracic border, mostly grayish-white, and very short 

 and thin, dense on a grayish mat on tubercles; that on entire disc mostly 

 black, of very scattered, short, bristle-like hairs not nearly concealing the 

 surface ; a black scutellar fringe followed by a pale one, and longer pale 

 grayish hairs on postscutellum and down the sides of metathorax. Meso- 

 thorax anteriorly with a median impressed line and coarse, very close 

 punctures, becoming more separated posteriorly, decidedly more so on a 

 very small disc. Scutellum shining, very coarsely and quite closely 

 studded with round punctures, postscutellum with fine cancellate punc- 

 tures. Pleura with very large, coarse, striate punctures. Superior face of 

 metathorax well defined by a rimmed angulation, and with the usual shin- 

 ing pits square medially, enclosure polished, approaching the T shape 

 because of the very wide base and narrow bowl, the former of these con- 

 vex with lateral ridges, and the latter with indistinct transverse rugae, the 

 surrounding areas shiny, sparsely punctured and irregularly feebly 

 August, 190J 



