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Bulletin 21 (1936-1941)
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Studies of Nearctic aquatic insects. I. Nearctic alder flies of the genus Sialis. II. Descriptions of Plecoptera
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By: Ross, Herbert H. (Herbert Holdsworth), - Frison, Theodore Henry, 1895-1945.
Type: Article
In: Bulletin
Volume: 21
Date: 1937
Page Range: 57--99
Publication info: Urbana State of Illinois, Dept. of Registration and Education, Natural History Survey Division 1918-1985
Descriptions of nearctic caddis flies (Trichoptera), with special reference to the Illinois species
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By: Ross, Herbert H. (Herbert Holdsworth),
Type: Article
In: Bulletin
Volume: 21
Date: 1938
Page Range: 101--183
Publication info: Urbana State of Illinois, Dept. of Registration and Education, Natural History Survey Division 1918-1985