THK ^VK^5TKR^S PINK-DESTROYING BARKBEKTLE. 



19 



Kl<i. .s. — The westiTii piiifdestroying barkln-L-lIc iltciuliuiUinun brcvi- 

 comi.s): Gallurius in the inner bark. (OriKinal.) 



"sorrei to])s," and I lie dciul ones, with nnldish-hrown foliatro, are 

 callod "rod tops," or, if willi l<aic hranclics or brokoii toj)s, arc known 

 as "black tops" or "hiokcn tops;"" (2) hy small masses of resin 

 (pitch tubes, fliis. 

 11 and 12, c) in 

 the crevices of the 

 bark of r(>cently 

 attacked livin<; 

 trees, as well a^ 

 in tho^e of the 

 dyini; and dead 

 ones; and (o) the 

 ])resence of the 

 species is deter- 

 mined by i-cmov- 

 in<2; the bark from 

 tlie dvin<; and dead trees and 1in(lin<,' the characteristic <ralleries (ii<r. 

 8 and Pis. TI, III). 



Tt must be renuMubered, however, that there are many dilTerent 

 kinds of insects, some of them closely resemblin*:^ th.e destructive 

 species, always found in dyinj; pine trees. Therefore, for the fjeneral 

 observer to be positive in the matter, specin\ens of insects and work 

 should be sent to the Bureau of Entomolofj^y for authentic i(l(Mitili- 



cat ion. 



DISTRIBUTION. 



The insect is found in soiilhcrn Idaho throufjjhout, and its ran<:e 

 extends to the nortii(>rn part of the State. It is recorded from Cali- 

 fornia, Or(>ir<>u, and eastern and western Washin^'tou, and, accordinir 

 to Doctor IIoj)kins, a variety occurs in Ari^-ona and New Mexico and 

 attacks the western yellow pine (f'iints jxnidn-osa) and the su^'ar |)ine 

 {Pinu.s hiihhi vfhnia ). 



EXTENT OF DAMAGE AND LOSSES. 



With oMr pH'seiit knowled,L^e of the dcst r.ict ivi' work of this !n.-;ect, 

 it is evident that a vast amount of tind)er has been killed by it during 

 the |)ast ten years within the ran<];e of its distrilnition. It is estinuited 

 that each year for the past two or three years, from J to .'> per cent of 

 the nuxtured standiui: bull pine timber within the section investipited 

 in the summer of lltO.'> has died as the result of its rava>;<'s. 



POSSIBILITIES OF PREVENTING LOSSES. 



With our additional kuowledtre of the life history and habits of the 

 Ix'ctle, we are able to su<;|^est ])raclical methods of cont lolling' it and 

 of i)reventin<j; a larj^e percenta<;e of the L.ssi's Ix-retofurc c-iMsi'd ! y its 

 dejiredations. 



oSeo Bui. 56, Bur. Ent., U. S. Dopt. .\gric. The Black Ilill.s B«'etlo. 

 :«2«0— No. .")S, pt 2— Ot) L' 



