76 



has the elytra everywhere normally scaly. Length, 4 5 mm. ; width, 2 mm., 

 varying to 3 5 mm. and even 3 mm. in length. 



Host tree. Western Hemlock. 



Distribution. Vancouver island and coast of British Columbia. At- 

 tacks and kills healthy hemlocks; also infests injured and dying trees and 

 slash. 

 Pseudohylesinus obesus Sw.; Dom. Ent. Br., Dept. Agric., Bull. 14: 15, 1917. 



Length, 4-5 mm.; a stout species, gradually wider behind; the pubes- 

 cence scale-like on the declivity. A rare species; known to us only from 

 Inverness, B.C., from the collection of Rev. J. H. Keen. 



Pseudohylesinus sitchensis Sw.; Dom. Ent. Br., Dept. Agric., Bull. 14: 12, 

 1917. 



Very closely allied to grandis, of the same size, but more slender, with 

 the front coarsely and less closely punctured, and the transverse impression 

 unusually deep; the elytral scales are less dense than in grandis and elongate, 

 becoming tufted behind the scutellum and notably so on the sides. 



Host tree? Sitka Spruce. 



Distribution. Vancouver island and coast of British Columbia. 



Apparently a secondary enemy. 

 Pseudohylesinus grandis Sw.; Dom. Ent. Br., Dept. Agric., Bull. 14: 14, 1917. 



A moderately stout species, densely clothed with brown and grey 

 scales, the lighter colour on sections of the interspaces and often forming 

 an irregular V-shaped mark on the elytra. Length, 2-8 mm. to 3-8 mm. 



Host trees. Grand Fir, Douglas Fir. 



Distribution. The southern half of the western coast of British Colum- 

 bia and southwards. Apparently also in Queen Charlotte islands, but the 

 host tree there is unknown to us. 



A destructive enemy of the grand fir in certain localities. 



Pseudohylesinus sericeus Mannh.; Bull. Mosc. 296, 1843, (Hylurgus); 

 Leconte, Am. Ent. Soc. Trans.; 2: 170, 1868; Rhynch. 379, 1876 (Hylesinus*}. 



More slender than grandis Sw.; with longer hairs; the pronotum of 

 the male transverse, almost oval, the frontal lobe of the pronotum less 

 distinct; the basal teeth of the elytra are isolated and acute; but the 

 antennal club has the first segment distinctly longer than the second. It is 

 in the series, nebulosus, sericeus, sitchensis, grandis. 



Since the first part of this bulletin was published, the Leconte collection 

 has been examined by the writer. The first specimen now in the Leconte 

 series under sericeus Mannh. is evidently a specimen received from Man- 

 nerheim himself by Leconte; it bears the Sitka label, and may be accepted 

 as definitely fixing the species. This specimen was not seen when the writer 

 studied the Leconte collection some years ago. It is entirely distinct from 

 grandis Sw. 



PLATE 17. 

 IPID BEETLES ALL MUCH ENLAKGED. 



Fig. 1, Ips tridens Mannh., female*. 



Fig. 2, Ips chagnoni Sw.*. 



Fig. 3, Ips engelmanni Sw., female*. 



Fig. 4, Ips pilifrons Sw., female*. 



Fig. 5, Ips laMens Lee*. 



Fig. 6, Hylastes sakbrosus Eichh.*, details of the elytra. 



Fig. 7, Ips pini Say**. 



Fig. 8, Hylastes porculus Er*, details of the elytra. 



Fig. 9, Ips calligraphus Germ*. 



Fig. 10, Eccoptogaster picece Sw., male.** 



Fig. 11, Ips calligraphus Germ*. 



*Original. ** Author's illustration. 



