98 



EE The elytral interspaces closely punctured ; the strial punctures 

 irregular on the disc; the declivital sulci deep. 



F The elytral declivity with the sulci very deep, the lateral 

 convexities very strongly elevated and very closely 

 strongly serrate along the summit. 



serratus n. sp. Page 103. 



FF The elytral declivity with the sulci of moderate depth, 



the lateral convexities moderately elevated and sparsely 



granulate along the summit, the punctures on the caudal 



half of the pronotum becoming nearly obsolete on the 



sides. 



G The elytra twice as long as wide, the strial rows distinct 



on the sides and usually discernible even on the 



disc, the interstrial punctures rather sparse on the 



sides; the pronotum sparsely punctured behind. 



pullus Zimm. Page 103. 



GG The elytra distinctly less than twice as long as wide, 

 the strial and interstrial punctures very close and 

 strongly confused, those of the interspaces every- 

 where numerous; the pronotum closely punctured. 



confertus Sw. Page 103. 



DD The punctuation of the elytral disc in fairly regular rows, the 

 interspaces impunctate or nearly so; the last ventral broadly 

 emarginate. 

 E The sides of the pronotum evenly arcuate from base to apex. 



bisulcatus Eichh. Page 103. 



EE The sides of the pronotum more or less constricted before the 

 middle. 

 F The declivity with the suture and lateral convexities 

 strongly granulate-setose, granulatus Sw. Page 103. 



FF The declivity with only faint traces of granules and no 

 setae. nudus Sw. Page 104. 



Pityophthorus ramiperda Sw.; Dom. Ent. Br., Dept. Agric, Bull. 14: 28, 1917. 



A rather stout species, 2^ times as long as wide, pronotum strongly 

 arcuate on the sides and asperate on the sides and front, the declivity very 

 steep, broadly rounded behind and only slightly retuse, interspace 9 elevated, 

 discal strise hardly impressed, strial punctures small, interspaces finely 

 sparsely punctured; length, 2-1 mm. Probably distinct generically from 

 both Pityophthorus and Conophthorus. 



Host tree. — White Pine. 



Distribution. — Isle Perrot, Que., Ste. Anne de Bellevue, Que., Chelsea, 

 Que., Stony Creek, Ont.; probably rather widely distributed in southern 

 Quebec and Ontario. It kills twigs by excavating tunnels in the pith as 

 well as in the bark. 



Pityophthorus nitidus Sw.; Dom. Ent. Br., Dept. Agric, Bull. 14: 25, 1917. 



The length, 2-1 mm., 2f times as long as wide; the female front flattened 

 subcircularly, densely minutely punctured and densely pubescent with short, 

 yellow hairs, the median carina in the form of a carinate tooth on the 

 epistoma; the male front flattened but coarsely closely punctured, with the 

 median carina well developed and pubescence indistinct. 



Host tree. — White Spruce. 



Distribution. — Southern Quebec, Nova Scotia. 



