MASSEY, C. L. , and N. D. WYGANT. 1954. 

 Biology and control of the Engelmann spruce 

 beetle in Colorado. U.S. Dept. Agr. Cir. 

 944, 35 pp. 



MATHERS, W. G. 1932. Spruce budworm in 

 British Columbia. Forestry Chron. 8: 154- 

 157. 



McCAMBRIDGE, W. F. (See Knight, 

 McCambridge, and Wilford. 1956) 



McCOMB, DAVID. 1953. The use of trap trees 

 for the control of the Engelmann spruce 

 beetle, Dendroctonus engelmanni Hopkins. 

 Master's thesis. Utah State Univ. , Logan. 



McCOMB, DAVID. 1955. Relationship between 

 trap tree felling dates and subsequent Engel- 

 mann spruce beetle attack. U.S. Forest 

 Serv. , Intermountain Forest and Range Expt. 

 Sta. Res. Note 23, 5 pp. 



Engelmann spruce trees felled in June , as 

 traps for Engelmann spruce beetles proved to 

 be most effective. 



McCOMB, DAVID. (See Nagel, McComb, and 

 Knight. 1957) 



McCULLOUGH, H. A. 1948. Plant succession 

 of fallen logs in a virgin spruce -fir forest. 

 Ecology 29: 508-513. 



McCULLOUGH, H. A. 1950. Preliminary com- 

 parison of tree mycorrhizae on fallen logs 

 and on the forest floor. Jour. Tenn. Acad. 

 Sci. 25: 224. 



McDOUGALL, W. B. , and M. C. JACOBS. 1927. 

 Tree mycorrhizas from the central Rocky 

 Mountain region. Amer. Jour. Bot. 14: 258- 

 266. 



McGUFFIN, W. C. 1943. New descriptions of 

 larvae of forest insects. VI. Semiothisa, 

 Paraphia , Protoboarmia (Lepidoptera, Geo- 

 metridae). Can. Ent. 75: 134-138. 



Includes Semiothisa granitata Gn. , Paraphia 

 piniata Pack, and Protoboarmia porcelaria indi- 

 cataria Wlk. 



McGUFFIN, W. C. 1943. New descriptions of 

 larvae of forest insects. VII. Pero, Nepytia, 

 Caripeta (Lepidoptera, Geometridae). Can. 

 Ent. 75: 186-190. 



Includes Nepytia canosaria and Caripeta 

 divisata. 



McKAY, H. H. , and P. L. LENTZ. 1960. De- 

 scriptions of some fungi associated with 

 forest tree decay in Colorado. Mycopathologia 

 et Mycologia Applicata, Den Haag 13:265-285. 



McKEEVER, D. G. 1942. Results of direct 

 seeding of western redcedar and Engelmann 

 spruce in the northern Rocky Mountain region. 

 U.S. Forest Serv., North. Rocky Mountain 

 Forest and Range Expt. Sta. Res. Note 21, 

 9 pp. 



McKINNON, F. S. 1940. Spruce regeneration 

 in British Columbia. Forestry Chron. 16:37-45. 



McMILLAN, CALVIN. 1948. Ataxonomic and 

 ecological study of the flora of the Deep Creek 

 Mountains of central western Utah. Master's 

 thesis. Univ. Utah, Salt Lake City. 



Community description. 



McQUILKIN, W. E. 1949. Direct seeding of 

 trees. IN: U,S. Dept. Agr., Trees, Year- 

 book of Agriculture, 1949: 136-146. 



Discusses advantages, disadvantages, prin- 

 ciples, and methods of direct seeding. 



MEEKER, VICTOR K. 1949. Reproduction of 

 Engelmann spruce in the central Rocky Moun- 

 tains. Master's thesis. Colo. State Univ. , 

 Fort Collins . 



MEEUWIG, RICHARD O. 1960. Watersheds A 

 and B. A study of surface runoff and erosion 

 in the subalpine zone of central Utah. Jour. 

 Forestry 58: 556-560. 



Gives climatic data. 



MERKLE, JOHN. 1954. An analysis of a 

 spruce-fir community on the Kaibab Plateau, 

 Arizona. Ecology 35: 316-322 . 



Includes community description and distribu- 

 tion, and climatic and edaphic data. 



MERRIAM, C. HART. 1890. Results of a bio- 

 logical survey of the San Francisco mountain 

 region of the Little Colorado in Arizona. 

 North Amer. Fauna 3: 1-134. 



Discusses distribution of Engelmann spruce 

 and lists associated species. 



MERRILL, T. C. (See Hartley, Merrill, and 

 Rhoads. 1918) 



METCALF, M. E. 1951. Lumber production 

 approaches all-time record for northern 



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