Insect enemies of the pine in the Black Hills forest reserve : an account of results of special investigations, with recommendations for preventing losses . h.).—This is amuch smaller and moreslender bark beetle thanthe two preceding spe-cies. Individuals varyin length from mm., and in colorfrom dark red to dullblack. This is also acommon, widely distrib-uted, and variable spe-cies. It extends fromthe Atlantic to the Pa-cific, and infests all ofthe Eastern and South-ern pines and spruces. Avariety (var. scopulorurnn. var.) was found in therock pine of the BlackHills, and has been
Insect enemies of the pine in the Black Hills forest reserve : an account of results of special investigations, with recommendations for preventing losses . h.).—This is amuch smaller and moreslender bark beetle thanthe two preceding spe-cies. Individuals varyin length from mm., and in colorfrom dark red to dullblack. This is also acommon, widely distrib-uted, and variable spe-cies. It extends fromthe Atlantic to the Pa-cific, and infests all ofthe Eastern and South-ern pines and spruces. Avariety (var. scopulorurnn. var.) was found in therock pine of the BlackHills, and has been col-lected by the writer froma number of other spe-cies of Western pines. It attacks and breeds in the inner bark on theroots, trunks, and branches of weakened and dying standing trees ofnil ages and sizes, from the very young to the oldest and largest. Italso breeds in immense numbers in the stumps, logs, and tops ofrecently felled trees. Tfieddrk-red turpentine beetle (Dendroctonus valens Lee.)—This is thelargest of the known North American bark beetles. The adults varyin length from (> mm. to mm. It attacks the bark on the base of liv-. Fig. 4.—Work of the Oregon Tomicus. Primary galleries en-graved in surface of wood. Central chamber extending intowood. Reduced about one-half (original). The Western form seems to be sufficiently different in some minor characters towarrant {\\\< distinction in variety name—occidental^. Bui. 32, New Series, Div. of Entomology, U. S. Dept. of Agriculture. Plate III.
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