Some Publications of the Illinois Natural History Survey 



BULLETIN 



Volume 27, Article 6. — Sex Ratios and Age 

 Ratios in North American Ducks. By Frank 

 C. Bellrose, Thomas G. Scott, Arthur S. 

 Hawkins, and Jessop B. Low. August, 196L 

 8+ p., 2 frontis., 23 fig., bibliogr. $L00 (Make 

 check payable to University of Illinois; mail 

 check and order to Room 279, Natural Re- 

 sources Building, Urbana, Illinois.) 



Volume 28, Article 1. — The Amphibians and 

 Reptiles of Illinois. By Philip W. Smith. 

 November, 196L 298 p., frontis., 252 fig., 

 bibliogr., index. $3.00. 



Volume 28, Article 2. — The Fishes of Cham- 

 paign County, Illinois, as Affected by 60 

 Years of Stream Changes. By R. Weldon 

 Larimore and Philip W. Smith. March, 1963. 

 84 p., frontis., 70 fig., bibliogr., index. 50 

 cents. 



Volume 28, Article 3. — A Comparative Study 

 of Bird Populations in Illinois, 1906-1909 

 and 1956-1958. By Richard R. Graber and 

 Jean W. Graber. October, 1963. 146 p., 4 

 frontis., 32 fig., bibliogr., index. $1.00. 



CIRCULAR 



39. — How to Collect and Preserve Insects. By 

 H. H. Ross. July, 1962. (Sixth printing, with 

 alterations.) 71 p., frontis., 79 fig. Single 

 copies free to Illinois residents; 25 cents to 

 others. 



47. — Illinois Trees and Shrubs: Their Insect 

 Enemies. By L. L. English. March, 1962. 

 (Second printing, with revisions.) 92 p., 

 frontis., 59 fig., index. Single copies free to 

 Illinois residents; 25 cents to others. 



49. — The Dunesland Heritage of Illinois. By 

 Herbert H. Ross. (In cooperation with Illi- 

 nois Department of Conservation.) August, 

 1963. 28 p., frontis., 16 fig., bibliogr. 



50. — The Wetwood Disease of Elm. By J. 

 Cedric Carter. May, 1964. 20 p., 19 fig. 

 Single copies free. 



BIOLOGICAL NOTES 



40. — Night-Lighting: A Technique for Cap- 

 turing Birds and Mammals. By Ronald F. 

 Labisky. July, 1959. 12 p., 8 fig., bibliogr. 



41. — Hawks and Owls: Population Trends 

 From Illinois Christmas Counts. By Richard 

 R. Graber and Jack S. Golden. March, 1960. 

 24 p., 24 fig., bibliogr. 



42. — Winter Foods of the Bobwhite in Southern 

 Illinois. By Edward J. Larimer. May, 1960, 

 36 p., 11 fig., bibliogr. 



43. — Hot-Water and Chemical Treatment of 

 Illinois-Grown Gladiolus Cormels. By J. L. 

 Forsberg. March, 1961. 12 p., 8 fig., bibliogr. 



44. — The Filmy Fern in Illinois. By Robert A. 

 Evers. April, 1961. 15 p., 13 fig., bibliogr. 



45. — Techniques for Determining Age of Rac- 

 coons. By Glen C. Sanderson. August, 1961. 

 16 p., 8 fig., bibliogr. 



46. — Hybridization Between Three Species of 

 Sunfish (Lepomis) . By William F. Childers 

 and George W. Bennett. November, 1961. 



15 p., 6 fig., bibliogr. 



47. — Distribution and Abundance of Pheasants 

 in Illinois. By Frederick Greeley, Ronald F. 

 Labisky, and Stuart H. Mann. March, 1962. 



16 p., 16 fig., bibliogr. 



48. — Systemic Insecticide Control of Some 

 Pests of I rees and Shrubs — A Preliminary 

 Report. By L. L. English and Walter Hart- 

 stirn. August, 1962. 12 p., 9 fig., bibliogr. 



49. — Characters of Age, Sex, and Sexual Ma-' 

 turity in Canada Geese. By Harold C. Han- 

 son. November, 1962. 15 p., 13 fig., bibliogr. 



50. — Some Unusual Natural Areas in Illinois 

 and a Few of Their Plants. By Robert A. 

 Evers. July, 1963. 32 p., 43 fig., bibliogr. 



MANUAL 



4. — Fieldbook of Illinois Mammals. By Donald 

 F. Hoffmeister and Carl O. Mohr. June, 

 1957. 233 p., color frontis., 119 fig., glossary, 

 bibliogr., index. $1.75. 



List of available publications mailed on request 



Single copies of Illinois Natur.al History Survey publications for which no price is listed 

 will be furnished free of charge to individuals until the supply becomes low, after which a 

 nominal charge may be made. More than one copy of any free publication may be obtained 

 without cost by educational institutions and official organizations within the State of Illinois; 

 prices to others on quantity orders of these publications will be quoted upon request. 



Address orders and correspondence to the Chief, Illinois N.\tural 

 History Survey, Natural Resources Building, Urbana, Illinois 



Payment in the form of money order or check made out to State Treasurer of Illinois, 

 Springfield, Illinois, must accompany requests for those publications on which a price is set. 



