62 MISCELLANEOUS FOEEST INSECTS. 



Bibliography. 



Pissodes rotundatus Le Conte, 1876, pp. 142, 143-144. Hopkins, 190G, pp. 254, 256, 



fig. 69. 



Subsection b6. 



Species Nos. 25 to 28.) 

 25. Pissodes burkei n. sp. 



(Plate IV, fig. 25.) 



The type specimen is labeled ''Type No. 7440 U.S.N.M.;" name; 

 "above Ouray, Colo., 9,000-10,000 ft., Mineral Point Trail, VII, 1897, 

 H. F. Wickham; 9 4." From Wickham's collection. Additional 

 specimens collected and host tree determined by H. E. Burke. 



Distinctive characters. — -This species is quite distinct from P. rotun- 

 datus but is more closely allied to P. piperi, from which it is distin- 

 guished by its decidedly grayish appearance and the distinct posterior 

 spot of the elytra. 



Variations.— The length varies from 6 to 7.7 mm., but there is 

 comparatively little variation in the color, except in rubbed specimens 

 which are darker. Thirty-two specimens were examined, including 

 all stages and work. 



Host tree. — Ahies lasiocarpa, in thick bark on living and dying trees. 



Distribution (Plate XXII, fig. 25).— (Hopk. U. S.) Vtali: Kamas 

 (Burke, collector). (U.S.N.M.) (H. & S.) Utali: Alta and Park 

 City, June (under P. costatus). Colorado: Ouray (Wickham). 



26. Pissodes piperi n. sp. 



(Plate IV, fig. 26; Plate V, fig. A; Plate XVIII; text fig. 8, A.) 



The type specimen is labeled "Type No. 7441, U.S.N.M.;" name; 

 "type of drawing; Mt. Rainier, Wash.; collector, C. V. Piper; 9 1." 

 Additional specimens were collected and host trees determined by 

 Messrs. H. E. Burke and J. L. Webb. 



Distinctive characters. — This species is at once distinguished from 

 P. lurlcei by its large size, dark color, sparsely placed elytral scales, 

 small posterior spot, and very coarse and deep punctures of elytral 

 striffi. 



Variations. — The length varies from 7.4 to 10 mm. and the pos- 

 terior spots of the elytra vary from obscure to distinct. Five adults 

 and 128 specimens examined, including all stages and work. 



Host trees.— Ahies lasiocarpa and Ahies concolor, in thick bark on 

 trunks of living ( ?) and dying trees. 



Distribution (Plate XXII, fig. 26).— (Hopk. U. S.) Washington: 

 Paradise Valley. Idaho: Centerville. (U.S.N.M.) (H. & S.) 

 British Columbia: Glacier. Washington: Mt. Rainier. 



