338 ANIMAL COMMUNITIES 



3. GENERAL 



Bird, R. D. 1930. Biotic communities of the aspen parkland of central 

 Canada. Ecology 11:358-442. 



Downing, Elliott R. 1922. A naturalist in the Great Lakes region. Univer- 

 sity of Chicago Press. 328 pp. Chicago. 



Ewing, H. E. 1909. A system and biological study of the Acarina of Illinois. 

 Univ. 111. Studies 3 (6) 1359-472, with 8 pis. 



Forbes, Stephen A., and Gross, A. O. 1922. The numbers and local distribu- 

 tion in summer of Illinois land birds. Bull. 111. Nat. Hist. Surv. 4:187-218. 



Frison, T. H., and Miller, R. B. 1926. See Shelford (1926). 



Hebard, Morgan. 1934. The Dermaptera and Orthoptera of Illinois. 111. 

 State Nat. Hist. Surv. Bull. 20: 125-279; chapter by H. H. Ross: "Biology 

 and habits of the orders, and ecological factors affecting Orthoptera," 

 pp. 125-35. 



Sanborn, Colin C. 1922. Chicago winter birds. Field Mus. Nat. Hist., 

 Zool. Lflt. No. 2. 12 pp. 



. 1925. The mammals of the Chicago area. Ibid. No. 8. 21 pp. 



Shelford, V. E. 191 5. The original habitat and distribution of our native 

 insect pests. Jour. Econ. Ent. 8:171-74. 



. 1926. Naturalists' Guide to the Americas. Baltimore, by various 



authors; "Illinois," p. 469. 



Van Cleave, H. J. 1927. A study of the characters for the identification of 

 the snakes of Illinois. Trans. 111. State Acad. Sci. 20:133-36 (41 spp. 

 enumerated). 



Chapter IV 



AQUATIC CONDITIONS 



Shelford, V. E. 1918. Conditions of existence. Ward and Whipple, Fresh- 

 water Biology, chap, ii, mi pp. New York. 



Chapter V 



LARGE LAKES 



Adamstone, F. B. 1924. The distribution and economic importance of the 

 bottom fauna of Lake Nipigon with an appendix on the bottom fauna of 

 Lake Ontario. Univ. Toronto Studies. "Biol. Series" 25:35-100. 



Clements, F. E., and Shelford, V. E. 1937. Bio-ecology. In Press. 



Eddy, S. 1927. Plankton of Lake Michigan. Bull. 111. Nat. Hist. Surv. 

 17:203-32. 



. 1932. The plankton of the Sangamon River in the summer of 1929. 



111. St. Nat. Hist. Surv. 19:469-86. 



. 1934. A study of freshwater plankton communities. 111. Biol. 



Mono. 12: 1-93. 



