69 



C The elytral striae strongly impressed on the disc, of moderate width, 

 with the punctures coarse and very distinct; the female with the 

 1st and 3rd declivital interspaces subequally, strongly serrate; 

 the male with the 1st declivital interspace coarsely serrate at 

 the top of the declivity and unarmed behind. California. 



cupressi Hopk. 



CC The elytral striae lightly impressed on the disc, very narrow, with 

 very small punctures; the female with the 3rd declivital inter- 

 space much more strongly elevated and serrate than the 1st; 

 the male with the 1st declivital interspace without coarse 

 serrations. 



D The interspaces of the disc and sides finely and densely granulate- 

 punctate; the interspaces of the declivity closely, deeply 

 and rather finely punctured, California. cristatus Lee. 



DD The interspaces of the disc and sides rather sparsely and coarsely, 

 transversely granulate, the punctures indistinct; the inter- 

 spaces of the declivity very feebly punctured in the female, 

 the punctures obsolete in the male. 



sequoiae Hopk. Page 70. 



BB The elytral declivity with the 2nd interspace as wide as the others; 

 the smooth, shining area of the caudal part of the proepisternum 

 small and central. 



C The elytral interspaces confusedly but rather sparsely "granulate- 

 punctate; the striae moderately impressed, punctured more 

 coarsely than in juniperi, but distinctly less coarsely than punc- 

 tatus; the median carina and lateral callus of the pronotum seldom 

 distinct; a smaller species, length, 3 mm. California. 



rugosus Sw. 



CC The elytral interspaces wider, confusedly, densely granulate- 

 punctate; the discal striae slightly impressed, finely punctured; 

 the median carina and lateral callus of the pronotum usually 

 distinct; a larger species, length, 3-4 mm. California. 



juniperi Sw. 



Phlceosinus pini Sw.; Can. Ent., 47: 362, Nov., 1915. 



A small black species, 2-5 mm. long; the female with the front flattened, 

 coarsely rugulose-punctate and finely carinate; the male with the front 

 similar but broadly impressed, with an obtuse elevation on each side, 

 and the pronotum strongly broadly constricted in front. 



Host tree. Jack Pine. 



Distribution. Riding mountains, Manitoba; probably more widely 

 distributed. 



Phloeosinus punctatus Lee.; Am. Phil. Soc. Proc., 15: 381, 382, 1876. 



Readily distinguished by the size, food plant, very coarse strial 

 punctures, and narrow 2nd striae on the declivity (PI. 15, fig. 8). 



Host trees. Giant Arborvitae in British Columbia; also recorded from 

 United States in Incense Cedar and Port Orford Cedar. 



Distribution. British Columbia, extending south into California. 



Phloeosinus canadensis Sw., Dom. Ent. Br., Dept. Agric., Bull. 14: 8, 1917. 



A black species, length, 2-5 mm. This is the common species in 

 arborvitae in Eastern Canada and the adjacent northeastern States. The 

 brood tunnels are very abundant in dying tops and branches, in weakened 

 areas on living trees, and less commonly in apparently healthy trees. The 



