108 MISC. PUBLICATIOX 2 81, U. S. DEPT. OF AGRICULTURE 

 Hockensmith, R. D., and Ticker, E. (1972) 



THE RELATION OF ELEVATION TO THE NITROGEN CONTENT OF GRASSLAND AND 

 FOREST SOILS IN THE ROCKY MOUNTAINS OF COLORADO. Soil Sti. 36: 41-45. 



1933. 

 Norton, E. A., and Smith, R. S. (1973) 



THE INFLUENCE OF TOPOGRAPHY ON SOIL PROFILE CHARACTER. JoUT. Amer. 



Soc. Agron. 22: 251-262, illus. 1930. 

 Ramaley, F. (1974) 



XEROPHYTIC GRASSLANDS AT DIFFERENT ALTITUDES IN COLORADO. Bull. 



Torrey Bot. Club 46: 37-52, illus. 1919. 

 Shreve, F. (1975) 



THE TRANSPIRING POWER OF PLANTS AS INFLUENCED BY DIFFERENCES OF 



altitude and habitat. Science (n. s.) 43: 363. 1916. 

 ■ (1976) 



CONDITIONS INDIRECTLY AFFECTING VERTICAL DISTRIBUTION ON DESERT 



mountains. Ecology 3: 269-274, illus. 1922. 

 Vestal, A. G. (1977) 



PHYTO GEOGRAPHY OF THE EASTERN MOUNTAIN-FRONT IN COLORADO. I. 

 PHYSICAL GEOGRAPHY AND DISTRIBUTION OF VEGETATION. Bot. Gaz. 68: 



153-193, illus. 1919. 



See also Blackman (14-74), and Shreve (I860). 



Biotic Factors 



Publications dealing with the effects of animals (chiefly insects and other lower 

 forms of life), as well as of mau (aside from his relation to fire and grazing), on 

 the forms, life history, succession, etc., of range vegetation. For references to 

 plant-animal relationships not included here, and more especially as regards the 

 control of range-destroying rodents, fire, game and wildlife management, see the 

 special sections on those topics. 



Abbott, C. E. (1978) 



THE PROBOSCIS RESPONSE OF INSECTS, WITH SPECIAL REFERENCE TO BLOW- 

 FLIES. Ann. Ent. Soc. Amer. 25: 241-244. 1932. 



Ainslie, C. N. (1979) 



the western grass-stem sawfly. U. S. Dept. Agr. Bull. 841, 27 pp., illus. 

 1920. 



— (1980) 



NOTES ON THE RECENT OUTBREAK OF TOXOPTERA GRAMINUM. Jour. Econ. 



Ent. 19: 800-801. 1926. 



— (1981) 



THE WESTERN GRASS-STEM SAWFLY, A PEST OF SMALL GRAINS. U. S. Dept. 



Agr. Tech. Bull. 157, 24 pp., illus. 1929. 



— (1982) 



THE ECONOMIC IMPORTANCE OF BIRDS AS INSECT PREDATORS. Wilson Bull. 



42: 193-197. 1930. 

 Ainslie, G. G. (1983) 



SILVER-STRIPED WEBWORM, CRAMBUS PRAEFECTELLUS ZINCKEN. JoUT. 



Agr. Research 24: 415-426. 1923. 



(1984) 



striped sod webworm, crambus mutabilis clemens. Jour. Agr. Research 



24: 399-415. 1923. 



(1985) 



THE LARGER SOD WEBWORM, CRAMBUS TRISECTUS WALKER. U. S. Dept. 



Agr. Tech. Bull. 31, 18 pp., illus. 1927. 



(1986) 



the bluegrass webworm. U. S. Dept. Agr. Tech. Bull. 173, 26 pp., illus. 



1930. 



Aldrich, J. M. (1987) 



the European frit fly in north America. Jour. Agr. Research 18: 451- 

 473. illus. 1920. 



