. Bulletin. Natural history; Natural history. 348 ILLINOIS NATURAL HISTORY SURVEY BULLETIN XX:IV. 279 280 of mating pairs, and adults with nymphs by the rearing of both sexes. Characteristics of the apical abdominal segments are shown in figs. 199, 226, 280, and the type of wing venation by fig. 172. The nymphs are essentially herbivorous. Although found in the same rivers and often in close association with T. nivalis they prefer the more stony portions of the stream bed near riffles. The small nymphs are not found by ordinary methods of collecting until late fall, and growth pro- ceeds most
. Bulletin. Natural history; Natural history. 348 ILLINOIS NATURAL HISTORY SURVEY BULLETIN XX:IV. 279 280 of mating pairs, and adults with nymphs by the rearing of both sexes. Characteristics of the apical abdominal segments are shown in figs. 199, 226, 280, and the type of wing venation by fig. 172. The nymphs are essentially herbivorous. Although found in the same rivers and often in close association with T. nivalis they prefer the more stony portions of the stream bed near riffles. The small nymphs are not found by ordinary methods of collecting until late fall, and growth pro- ceeds most rapidly during December, January and February. Nymphal mouthparts are shown in figs. 56, 86, 116, and the apical abdominal segments of the female in fig. 279. The Walsh (1862) rec- ord of Taeniopteryx fasciata from Rock Island, 111. cer- tainly refers to this species. Walsh's identification of fasciata was checked by Hagen, whose placement of fasciata has been accepted by Needham and Claassen (1925). The latter authors however overlooked in their monograph the placing in synonymy of the Walsh record. Fasciata is one of the two commonest species of Taeniopteryx (in the broad sense as used at the time of the paper by Walsh) in Illinois, is very common at Rock Island, and markings of wings have always assisted in its correct identification. The record of Walsh was also overlooked in my paper in 1929. Adults.—Algonquin: Apr. 1, 1907, 19. Barstow: Apr. 2, 1928, Icf. Carmi: Mar. 8, 1928, 2 cf, 19. Charleston: Mar. 9, 1930, Id'; Mar. 22, 1931, 19. Como: Mar. 11, 1928, cfcf", 99- Danville: Mar. 11, 1928, cfcf, ??• Dixon: Apr. 3, 1928, cfcf, 99- Elizabethtown: Mar. 7, 1928, 19. Erie— Denrock: Apr. 3, 1928, 2cf, 29. Grand Detour: Apr. 3, 1928, cfcf, 99. Grayville: Mar. 8, 1928, 10d', 79. Havana: Apr. 21, 1898, 19; Apr. 30, 1912,29. Herod: Mar. 6, 1928, 19. Homer: Mar. 19, 1907, 1 c?'. Kankakee: Mar. 25, 1928, Id", 19. Keithsburg: Apr. 4, 1932, 99. Lexington: Mar. 25, 1928
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