46 MISCELLANEOUS FOREST INSECTS. 



strongly elevated and acutely rugose third and iifth interspaces of 

 the elytra, and the small posterior si)ot. The pronotal ])unctures 

 are also more distinctly separated than in the other species. 



Variations. — There is some variation in size — the length ranging 

 from 5 mm. to 5.5 mm. — and in the elytral spots, color of scales, 

 etc. Three adult specimens, 1 female and 2 males, have been 

 examined. 



Host tree. — Unknown, probably Picea. 



Distribution (Plate XIX, fig. 3).— (U.S.N.M.) California: Hum- 

 boldt County. Oregon: Astoria. Washington: Tenino. 



Subsection b2. 



(Species Nos. 4 to 14.) 



Adults. — The beak is slender and shorter than the prothorax in 

 some species and longer in others. The basal angles of the pronotum 

 are rectangular but not acute. The third and fifth elytral inter- 

 spaces are moderately to strongly elevated and rugose. Species 4 to 6 

 have large anterior and posterior spots on the elytra. The sides of 

 the elytra are parallel and the beak is never longer than the pro- 

 thorax. Species 7 to 14 have small anterior and posterior spots on 

 the elytra ; the elytra are slightly narrowed anteriorly and the beak 

 in some of the species is longer than the prothorax. Species 9 to 12 

 have the third and fifth interspaces of the elytra distinctly elevated 

 and broader than the second and fourth, and the punctures of the 

 pronotum are moderately coarse and densely placed. Species 13 

 and 14 have the third and fifth interspaces of the elytra only slightly 

 broader than the second and fourth, but strongly elevated and 

 acutely rugose. The pronotum is distinctly narrower than the elytra 

 and the pronotal punctures are very coarse. 



Sexes. — In species 4 to 6 the beak of the males is shorter than the 

 thorax and that of the females is rarely longer, while in species 7 to 14 

 the beak of the males is as long as the prothorax, and in a few cases 

 longer; that of the females is usually longer and often distinctly so. 



Pupse. — The fifth and sixth abdominal tergites of species 4 and 6 

 have small spines between the prominent dorsal ones, while in species 

 5 and 7 to 14 they are obscure or absent. 



Larvse. — The apical tooth of the mandibles is acute and the ab- 

 dominal spiracles are distinct. In species 4, 5, and 7 to 10 the eye 

 spots are distinct, while in species 6 and 14 they are not. 



Hosts. — Species 4 and 5, Picea; species 6, Pinus and Picea; species 

 7, 8, 10, and 12 to 14, Pinus; species 11, Cedrus. 



Distribution. — Species 4, Rocky Mountains; species 5, Pacific 

 coast; species 6 and 7, eastern United States; species 8, northern 

 Rocky Mountains; species 9, Canada; species 10, 11, Southern 

 States; species 12, 13, California; species 14, southern Rocky Moun- 

 tains. 



