. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. TTIK WESTERN PINE-DKSTROVIN(i 1?.\HKMK?:TLE. 19. Flo. 8.âThe western piiie-tlestroyiiiK biirkljeetle {Detulioctonits brevi' comis): Galleries in the inner bark. (Original.) ".sorrel tops," and tli(> (lead oin'.s. with rcddish-l^rown foliafjo, are called "nMl to|).>," t»r. if w it!i hare branches or l>rokon tojKs, are known as 'Mack t(>i)s" or â l)t(»kcn lops;"" (2) hy small masses of r«\sin (j)ite]i tubes, iii^s. 11 and 12, c) in the crevices of the bark of recent
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. TTIK WESTERN PINE-DKSTROVIN(i 1?.\HKMK?:TLE. 19. Flo. 8.âThe western piiie-tlestroyiiiK biirkljeetle {Detulioctonits brevi' comis): Galleries in the inner bark. (Original.) ".sorrel tops," and tli(> (lead oin'.s. with rcddish-l^rown foliafjo, are called "nMl to|).>," t»r. if w it!i hare branches or l>rokon tojKs, are known as 'Mack t(>i)s" or â l)t(»kcn lops;"" (2) hy small masses of r«\sin (j)ite]i tubes, iii^s. 11 and 12, c) in the crevices of the bark of recently attacked living trees, as well tis in tliose of the dyino: and dead ones; and (3) the presence of the species is deter- mined by remov- ing:: the bark from the dyin^: and dead trees and liiuiin*; the characteristic galleries (fig;. 8 and Pis. II, III). It must be remem})ered, however, that there are many different kinds of insects, some of them closely resemblinj; the destructive species, alwaj^s found in dying: pine trees. Therefore, for the general observer to be positive in the matter, sj^ecimens of insects and work should be sent to the Bureau of for authentic identifi- cation. DISTRIBUTION. The insect is found in southern Idaho throughout, and its range extends to the northern part of the State. It is recorded from Clali- form'a, Oregon, and eastern and western Washington, and, according to Doctor Hopkins, a vari(>ty occurs in Arizona and N(>w Mexico and attacks tlie western yellow jhuc l/'huis jxtruhrofid) and the sugar ])ine (Pinufi InmhirfiaiKi). EXTENT OF DAMAGE AND LOSSES. With our ))resent knowledge of the destnictive work of this insect, it is evident that a vast amount of timber has been killed by it during the past ten years within tlie range of its distribiition. It is estimated that each year for the past two or three years, from 2 to 5 per cent of the nuitured standing bull pine timber within the section investigated in the summer
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