426 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 9 



Similar to P. flavipes, but smaller, pubescence shorter and frons more flattened, 

 subimpressed. Head rather large, subquadrate, punctulate, black, densely squamosa 

 with green scales; frons between eyes lightly impressed, with deep median puncture; 

 eyes small, semiglobose, brown; rostrum narrower than head and half as long, 

 similarl}' squamose. Antennae slender, pallid testaceous, hardly surpassing the base 

 of the thorax. Thorax small, transverse, basally and apically truncate, somewhat 

 rounded at sides, lightly convex on dorsum, lightly transversely impressed near base 



Fig. 27. Poplar root weevil, Polydrusus impressifrons Gyll. " 



and apex, punctulate, black, densely clad with green scales. Scutellum triangular, 

 squamose. Elytra at base one-half wider than thorax; humeri elevated, almost 

 rectangular; apices conjointly acuminate; six times as long as thorax, .convex, subtly 

 punctate-striate, interspaces broad, flat; black, covered with green scales mixed 

 with short fuscous pubescence; interspaces sparsely and finely punctate. Body 

 beneath punctulate, black, densely squamose. Legs rather short, pallid testaceous, 

 cinereo-pubescent ; claws brown. 



\'^ariety 0. Color of scales more splendid, flavo-virescent. 



Variety y. Color of scales coeruleo-virescent. 



Very careful drawings of the immature forms have been made by the 

 writer, to aid in the field identification of the species. These are 

 based on specimens furnished by Mr. Parrott. 



