128 



behind, broadly flattened on the declivity, the strise only very faintly 

 impressed. 



Host tree. Oak stump, species not determined. 



Distribution. Isle Perrot, Que., 29-VIII-1910. Apparently very rare. 



Xyleborus pubescens Zimm.; Am. Ent. Soc. Trans., 2: 145, 1868. 



Length, 2-7 mm., slender; the pronotum strongly punctured behind, 

 the elytral strise distinctly impressed; the declivity moderately convex, 

 shining, the strise impressed, the strial punctures very coarse, shallow, and 

 not very regular, the 1st and 3rd interspaces slightly elevated and armed 

 each with three or four rather coarse, acute granules. 



Described from material compared with the type of pubescens Zimm. 

 in the Leconte collection. Allied to but distinct from inermis Eichh. 



This species agrees closely with Eichhoff's description of his pini, and 

 probably pini Eichh. (1867) should be used instead of pubescens Zimm. 

 (1868). 



Distribution. Represented in our collection from Virginia, Florida, 

 and Alabama. It will probably not occur in Canada. 



Xyleborus celsus Eichh.; Berl. Ent. Zeit., p. 400, 1867. 



Length, 4 mm. to 4-5 mm.; a large and very distinct species. Breeds 

 in hickories in the Eastern and Southern States; it may occur in southern 

 Canada but has not been recorded. 



Xyleborus fuscatus Eichh.; Berl. Ent. Zeit., p. 400, 1867. 



Length, 3-2 mm., female; 2-1 mm., male. Occurs in the Southern 

 United States, north to New Jersey; recorded from oak and other hard- 

 woods; not known from Canada. 



Xyleborus impressus Eichh.; Berl. Ent. Zeit., p. 400, 1867. 



Length, 2-7 mm., female. Occurs in the Southern United States, 

 north to Massachusetts; not known from Canada. 



The Genus Xylocleptes Ferrari. 

 Ferrari, Borkenkafer, 37, 1867. 



Several species occur in the United States, chiefly in the south and west, 

 usually in Cucurbita. None recorded from Canada. 



The Genus Dryocoetes Eichhoff. 



Eichhoff, Berl. Ent. Zeit., 38, 1864. 



Key to the Canadian Species. 



A The sutural strise strongly impressed on the disc and declivity, very small 

 species, not much exceeding 2 mm. in length; the strial punctures of the 

 elytra much larger than those of the interspaces. 



PLATE 30. 



Dendroctonus monticoloe Hopk.; tunnels on the inner face of the bark; from a Western Yellow 

 pine killed by the beetles; about four-fifths natural size (Author's illustration). 



1, Egg-tunnels. 



2, Larval-mines. 



3, 3a, Egg-tunnels of Ips integer Eichh. 



