THE GENUS PTSSODES. 47 



4. Pissodes sitchensis n. sp. 



(I'Mo V, fig. /}; I'lalo XIII; text figs. .'5-7.) 



The type specimen is labeled "Type Xo. 7428, U.S.N.M.;" name; 

 "Hoquiam, Wash.; H. E. Burke, collector; 9; Hopk. U. S. 2289c." 

 The species was described from a large series, including all stages, 

 work, and parasites, collected and reared from terminals. 



Distinctive characters. — This species is closely allied to P. engel- 

 manni and P. strohi, from the first of which it is distinguished by the 

 subopaque pronotum, the absence of dark band on the posterior spot 

 of the elytra, and the rather coarse punctures of the elytral striae; 

 from the latter it is distinguished by its average smaller size and nar- 

 rower prothorax, as well as by its distribution and habits. 



Variations. — There is not very much variation in size — length 

 5 to 5.3 mm. The color ranges from light to dark brown. The spots 

 of scales vary in size, color, and density, and there is some variation 

 in the relative width of the prothorax and in the size of the punctures 

 of the elytral striae. More than 200 specimens have been examined, 

 including both sexes, larvae, pupae, and work. 



Host tree. — Picea sitchensis, infesting tops and terminals of saplings 

 and small trees; quite injurious. 



Extensive observations have been made by Mr. Burke on the habits 

 and seasonal history of this species. 



Distribution (Plate XIX, fig. 4). — (Hopk. U. S.) Oregon: Astoria. 

 Washington: Hoquiam, North Bend, Pialschie, wSatsop. 



5. Pissodes engelmanni n. sp. 



(Plate VI, fig. 5.) 



The type specimen is labeled "Type No. 7427, U.S.N.M.;" name; 

 "type of drawing; Picea engelmanni; Smith's Ferry, Idaho, Aug. 10, 

 '05; J. L. Webb, collector;? 3; Hopk. U. S. 5314." From a series 

 of 50 adults reared August 23 to November 14 from section of top of 

 spruce containing larvae and pupae collected August 10, 1905. 



Distinctive characters. — This species is distinguished from the pre- 

 ceding in that the pronotum is shining, the posterior spot of the 

 elytra has a dark border, and the punctures of the elytral striae are 

 indistinct, especially on the lateral area. From P. strohi it is dis- 

 tinguished by its generally smaller size, coarse punctures of the 

 pronotum, and more obscure punctures of the elytral striae, as also 

 by its distribution, habits, and host. 



Variations. — There is very little variation in size. The color 

 ranges from light to dark brown, the spots of scales vary in size, color, 

 and density, and the dark border of the posterior spot from distinct 

 to obscure. The punctures of the pronotum and elytra vary con- 

 siderably in size and distinctness. More than 150 specimens were 

 examined, including both sexes, larvae, pupge, and work. 



