48 MISCELLANEOUS FOREST INSECTS. 



Host tree. — Picea engelmanni, infesting tops and terminiils of 

 saplings and small trees; quite injurious. 



Extensive observations on the habits and seasonal history of this 

 species have been made by Messrs. Burke and Webb, 



Distribution (Plate XIX, fig. 5). — (Hopk. U. S.) Colorado: Mani- 



tou Park. Idaho: Smiths Ferry. Montana: Little Belt National 



Forest. 



6. Pissodes strobi Peck. 



(Plate ni, fig. 6; Plate VI, fig. 6; Plate XIV; text figs. 1, 2.) 



This species is represented in the collection by a typical specimen 

 labeled with name, " type of drawing; Pinus strohus; Webster, N. H.; 

 W. F. P'iske, collector; 9 6; Hopk. U. S. 3215b;" by 2 specimens 

 labeletl ''Pinus strohus; Milford, Pa.; A. D. Hopkins, Nov. 14-25, 

 bred; Hopk. U. S. 6077," and by one small specimen labeled 

 "Edsallville, Pa." 



Distinctive characters. — This species is most closely allied to P. 

 engelmanni, from which it is distinguished by its average larger size, 

 dense punctures of the pronotum and distinct punctures of the 

 elytral striae, as well as by its distribution and habits. 



Variations. — There is considerable variation in size — 4.5 to 6 mm, 

 m length — but the average is nearer the latter extreme. The color 

 ranges from dark to light brown. The spots of scales vary consid- 

 erably in size, density, and color and in the presence or absence of 

 a dark border to posterior lateral spot of the elytra. There is also 

 considerable variation in the form of the pronotum and in the 

 punctures of the pronotum and elytral strise. More than 500 speci- 

 mens were examined, including all stages and work. 



Host trees. — Pinus strohus, Pinus rigida, Pinus divaricata, Picea 

 ruhens, and Picea excelsa; infesting terminals. Very injurious to 

 white pine, much less so to the other species. 



Distribution (Plate XIX, fig. 6). — (Hopk. U. S.) Connecticut: 

 Hartford, Pomfret Center. Maine: Alfred, Bangor, Portland. 

 Massachusetts: Framingham. Michigan: Grand Rapids. New 

 Hampshire: Colebrook, Dover, Franconia, Keene, Monadnock, New- 

 port, Penacook, Pike, Rochester, Tamworth, Webster, Wiers. 

 New YorJc: Kiamesha, Kidders. North Carolina: Biltmore (David- 

 sons River). Pennsylvania: Cisuarun, Milford, Mount Airy (Frank- 

 lin County), Trucksville, Wilkesbarre. West Virginia: Kanawha 

 Station, Cairo. Wisconsin: Ashland. Canada: Ontario — Guelph, 

 Ottawa; New Brunswick — Chatham, Frederickton. (Hopk. W. Va.) 

 Massachusetts: Middlesex Falls. West Virginia: St. George, Tucker 

 County. (U.S.N.M.) Massachusetts: Boston. Pennsylvania: Ed- 

 sallville. Michigan: Grand Ledge. New Hampshire: Contoocook. 

 New YorJc: New Baltimore. 



