Some Pithlicatious of the Ii.i.iNois Nmikai. HiSTOin SuR\EV 



lU LLETIN 



\'(ilume 27, Article 6. — Sex Ratios ami Age 

 Ratios in North American Ducks. By Frank 

 (.". Bellrose, Thomas Cj. Scott, Arthur S. 

 Hawkins, and Jessop B. Low. August, 1961. 

 S4 p., 2 frontis., 23 fig., bibliogr. $1.00 (Make 

 check payable to University of Illinois; mail 

 check and order to Room 279, NaturnI Re- 

 sources Building, Urbana, Illinois.) 



\'olume 28, Article 1. — The Amphibians and 

 Reptiles of Illinois. By Philip W. Smith. 

 November. 1961. 298 p., frontis., 252 tig., 

 bibliogr., index. $3.00. 



\'olume 28, Article 2. — Ihe Fishes of Cham- 

 paign County. Illinois, as Affected by 60 

 ^'ears of Stream Changes. By R. Weldon 

 Larimore and Philip W. Smith. March, 1963. 

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

 cents. 



\'()lume 28, Article 3. — A Comparative Study 

 of Bird Populations in Illinois, 1906-1909 

 and 1956-1958. By Richard R. Graber and 

 Jean W. (Iraber. October, 1963. 146 p., 4 

 frontis.. 32 fig., bibliogr., index. $1.0(1. 



CIRCULAR 



39. — How to Collect and Preserve Insects. B\' 

 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. 



4S. — Diseases of Wheat, Oats, Barley, and Rye. 

 By G. H. Boewe. June, 1960, 159 p.. frontis., 

 56 fig. Single copies free to Illinois resi- 

 dents; 25 cents to others. 



49. — The Dimesland Heritage of Illinois. B\ 

 Herbert H. Ross. (In cooperation with Illi- 

 nois Department of Conservation.) August, 

 19^3. 28 p., frontis., 16 fig., bibliogr. 



BIOLOGICAL NOTES 



10. — Night-lJghtiiig: A Icclinicjiu- lor 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. — \\'inter 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 Coimels. 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 (lien 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. — S\stemic Insecticide Control of Some 

 Pests of Trees and Siirubs — .\ Preliniinar\ 

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

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



49. — Characters of Age, Sex, and Sexual 

 Maturity in Canada Cjeese. By Harold C. 

 Hanson. November. 1962. 15 p.. 13 fig., 

 bibliogr. 



50. — Some I'nusual 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. Hotfmeister and Carl O. Mohr. June, 

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

 bibliogr., index. $1.75. 



List of nvailablf ptihli cations mailed on request 



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

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



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

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