220 THE CANADIAN ENTOMOLOGIST. 



In specimens from the Western Coast, which I have not separated from 

 iiiieaiiis, the yellow caudal border of the pronotum extends forward to 

 cover almost the entire disc, leaving the front angles black. 



When specimens of either species are killed before completion of 

 pigmentation, the bands are fainter, and the whole body may be yellowish. 



With a large number of specimens before me, I find no difficulty in 

 separating the two species from colour markings alone, and they are quite 

 distinct in the other characters described. 



I have taken the form which I consider lineatiis or hivittata from 

 conifers only, and betulLe only from deciduous trees. 



Type specimens, J and 9 , taken from Betula liitea at Ste. Anne de 

 Bellevue, Quebec Province. 



Phloeotribics picece, n. sp. — Length, 2-2 J^ mm.; width, .8 mm. 

 Colour brown to black ; sparsely hairy ; form more slender than liminaris 

 or fro7italis. 



Head subglobose ; front roughened by large, rather closely-placed 

 punctures bearing slender yellowish hairs ; above and on the sides 

 minutely acupunctate ; epistomal region concave, bounded above by a 

 crescentic ridge ; hairs from the concave area longer; antennae arising 

 from above the outer angle of the mandibles, as in liminaris d^Xid. frontalis ; 

 antennal grooves short and deep ; eyes entire and elongate. 



Pronotum with lateral margins slightly rounded, distinctly narrowed 

 cephalad ; cephalic margin broadly rounded ; caudal margin nearly 

 straight, margined and deflexed ; sparsely clothed with rather stout 

 yellowish hairs arising from the sparsely placed, slightly tuberculate, very 

 coarse punctures ; sceutellum minute. 



Elytra rather elongate, sides subparallel, strongly narrowed behind ; 

 ventral margin of the declivity strongly serrate ; base of elytra raised and 

 margined with stout, recurved, crescentic tubercles; deeply punctate-striate; 

 striae with large, deep, closely placed punctures which bear very short 

 inconspicuous hairs ; interspaces strongly raised, carinate, with a row of 

 setose tubercles which are larger behind, forming the serrations of the 

 declivital interspaces, and become reduced to granulate punctures at the 

 base ; interspaces of the declivity strongly serrate. The ventral maigin 

 of the declivity is a serrate ridge formed by the union of the 9th and. loth 

 interspaces, which fuse on the anterior third of the elytra. The serrations 

 of this ridge are triangular and prominent. The ridge extends across the 

 caudal face of the declivity below to fuse with the third interspace. 



