. A century of biological research. Illinois. Natural History Survey Division. 206 Illinois Natural History Survey Bulletin \^ol. 27, Art. 2 The last circular published. Illinois Trees and Shrubs: Their Insect Enemies, is numbered 47. Some of the circulars have been reprinted more than once, one of them, that on insect collectintr, five times. Diverse in several ways are the articles published in the Biolojiical Notes series. tions of typewritten copy. The most re- cent article of the Bioloj^ical Notes is No. 39. The fourth of the series of publications now issued by the Illinois Natural His-
. A century of biological research. Illinois. Natural History Survey Division. 206 Illinois Natural History Survey Bulletin \^ol. 27, Art. 2 The last circular published. Illinois Trees and Shrubs: Their Insect Enemies, is numbered 47. Some of the circulars have been reprinted more than once, one of them, that on insect collectintr, five times. Diverse in several ways are the articles published in the Biolojiical Notes series. tions of typewritten copy. The most re- cent article of the Bioloj^ical Notes is No. 39. The fourth of the series of publications now issued by the Illinois Natural His- tory Survey is the manual. Each number is concerned with a single group of the. A few of the circulars, articles of the Hulletin, and biological notes issued recently by the Illinois Natural History Survey. the first of which was issued in Decem- ber, 1933, in mimeographed form. Some of the articles stand as progress reports of extensive projects, later to be subjects of articles in the Bulletin. Some are final reports covering small projects. Some are technical. Some emphasize "how-to-do" and in content and language are similar to the circulars. They are on various subjects and of various lengths. Early articles in this series were mimeographed and they contained no illustrations. Recent articles have contained illustrations and they have been planographed reproduc- state Hora or fauna, and each is designed for use by young as well as mature nat- uralists. The first of the manuals was iieldhook of Illinois Wild Flowers. It was issued in 1936, is now out of print, and is being revised. Three other man- uals have been published, one on land snails, one on native shrubs, and one on mammals. Preceding the manual series in time, and somewhat similar in character, were the now discontinued final reports, two on birds and one on fishes (Ridgwav 1889, 1895; Forbes & Richardson 1908).. Please note that these images are extracted from scanned page images that may have been
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