Canadian Bark~bee : tlesV 



PART I. DESCRIPTIONS OF NEW SPECIES. 



By J. M. SWAINE. 



Assistant Entomologist in Charge -of Forest Insect Investigations. 



INTRODUCTION. 



The descriptions of new species composing this paper are presented at this 

 time in order that the names may be used, without being accompanied by long 

 descriptions, in a short series of technical and practical bulletins now in course 

 of preparation. The types and paratypes of the new species described are in 

 the National Collection of insects at Ottawa, unless otherwise stated in the text. 



Crypturgus borealis, n. sp. 



Description of the female. Closely related to corrugatus, but with the 

 sides of the elytra more distinctly parallel, the elytra noticeably coarsely granu- 

 late, and the body much more hairy; the length, 1.2 mm. 



The head is minutely recticulate ; the front convex, sparsely setose-punctate, 

 strongly recticulate-granulate, with a large obliquely impressed triangular 

 postepistomal area very strongly reticulate, bearing numerous long, coarse hairs; 

 with a small circular fovea in the centre of the front; the median epistomal lobe 

 strongly protuberant; the eyes coarsely granulate and circularly emarginate. 



The pronotum slightly longer than wide, 27:23, broadly rounded behind 

 and in front, the sides rounded less strongly than in atomus, widest behind the 

 middle, more strongly narrowed in front; the disc moderately convex, the 

 surface minutely and strongly recticulate, finely, feebly, moderately closely 

 but not densely punctured, the punctures a little smaller than in atomus and 

 very shallow, and the pubescence somewhat more distinct. 



The elytra have the sides straight and parallel to beyond the middle, 

 strongly narrowed on the caudal third; the striae wide, feebly impressed; the 

 sutural striae a little more strongly impressed throughout, and rather coarsely, 

 very closely punctured; the interspaces narrow, subconvex, densely coarsely 

 granulate, with a row (sometimes confused) of fine, closely placed setose punc- 

 tures; the setae from strial and interstrial punctures similar on the disc, the 

 strial setae shorter on the declivity, on the disc and sides longer in this species 

 than in atomus, and the interstrial punctures being so much more numerous, this 

 species is quite noticeably hairy. The last three striae are more deeply impressed 

 in this species than in atomus. The declivity has the apical half covered by a 

 subcircular, glabrous, somewhat swollen, brownish, spongy area, formed by 

 extremely minute and densely placed pores bearing minute setae. 



The male has the postepistomal area of the front plano-concave, strongly 

 recticulate, and setose-punctate as in the female, but lacking the definite frontal 

 pit; the elytral declivity is normally rather strongly rugulose-punctate and 

 hairy, without the spongy apical area. Of 28 specimens from Manitoba and 

 Alberta, 27 are of the female type, with the spongy apical tips and frontal pit; 

 one is of the male type. 



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