INSECT ENEMIES OF WESTERN FORESTS 247 



(18) Buckhorn, W. J. 



1944. INSTRUCTIONS FOR MAKING BARK-BEETLE SURVEYS IN THE VIRGIN 

 PONDEROSA PINE STANDS OF OREGON AND WASHINGTON. U. S. 



Bur. Ent. and Plant Quar., Forest Insect Lab., Portland, 

 Oreg. [Processed.] 



(19) Burgess, A. F., and Crossman, S. S. 



1927. THE SATIN MOTH, A RECENTLY INTRODUCED PEST. U. S. Dept. 



Agr. Bui. 1469, 23 pp., illus. 



(20) Burke, H. E. 



1905. BLACK CHECK IN WESTERN HEMLOCK. U. S. Bur. Ent. Cir. 61, 

 10 pp., illus. 



(21) 



1917. FLAT-HEADED BORERS AFFECTING FOREST TREES IN THE UNITED 



states. U. S. Dept. Agr. Bui. 437, 8 pp., illus. 

 (22) 



1919. BIOLOGICAL NOTES ON SOME FLATHEADED BARKBORERS OF THE 



genus melanophila. Jour. Econ. Ent. 12: 105-108. 

 (23) 



(24) 



(25) 



1928. THE western cedar pole borer or powder worm. U. S. Dept. 



Agr. Tech. Bui. 48, 16 pp., illus. 



1929. the pacific flathead borer. U. S. Dept. Agr. Tech. Bui. 83, 



36 pp., illus. 



1930. WHICH insects are the important enemies of shade, park, 



AND ORNAMENTAL TREES IN THE PACIFIC STATES? Jour. Econ. 



Ent. 23: 783-785. 

 (26) 



1932. TWO DESTRUCTIVE DEFOLIATORS OF LODGEPOLE PINE IN THE 



Yellowstone national park. U. S. Dept. Agr. Cir. 224, 

 20 pp., illus. 

 (27) 



1939. IMPORTANT INSECT PESTS OF DECIDUOUS SHADE TREES. Sixth 



West. Shade Tree Conf. Proc. 6: 37-43. 

 (28) Hartman, R. D., and Snyder, T. E. 



1922. THE LEAD-CABLE BORER OR "SHORT-CIRCUIT BEETLE" IN CALI- 

 FORNIA. U. S. Dept. Agr. Bui. 1107, 56 pp., illus. 



(29) and Herbert, F. B. 



1920. California oak worm. U. S. Dept. Agr. Farmers' Bui. 1076, 

 14 pp., illus. 



(30) Chamberlin, W. J. 



1918. BARK-BEETLES INFESTING THE DOUGLAS FIR. Oreg. Agr. Expt. 



Sta. Bui. 147, 40 pp., illus. 



(31) 



1920. THE WESTERN PINE BARK-BEETLE, A SERIOUS PEST OF WESTERN 



yellow pine in Oregon. Oreg. Agr. Expt. Sta. Bul. 172, 

 30 pp., illus. 

 (32) 



1939. THE BARK AND TIMBER BEETLES OF NORTH AMERICA. Oregon 



State College Coop. Assn., Corvallis, Oreg., illus. 

 (33) Craighead, F. C. 



1915. CONTRIBUTIONS TOWARD A CLASSIFICATION AND BIOLOGY OF THE 

 NORTH AMERICAN CERAMBYCIDAE, LARVAE OF THE PRIONINAE. 



U. S. Dept. Agr. Rpt. 107, 24 pp., illus. 

 (34) 



(35) 



1922. EXPERIMENTS WITH SPRAY SOLUTIONS FOR PREVENTING INSECT 

 INJURY TO GREEN LOGS. U. S. Dept. Agr. Bul. 1079, 11 pp. 



1923. NORTH AMERICAN CERAMBYCID LARVAE. A CLASSIFICATION AND 

 THE BIOLOGY OF NORTH AMERICAN CERAMBYCID LARVAE. 



Canada Dept. Agr. Ent. Branch Bul. (n. s.) 27, 238 pp., 

 illus. 



