. Bulletin. Natural history; Natural history. M: 195.^ Burks: The AIayflies of Illinois 91 longitudinal veins of fore wing stained a faint yellow-brown. Abdomen uniformly red-brown, each segment with posterior margin slightly darkened; terminal abdom- inal sternite with a relatively shallow, broad, rounded, median excavation on posterior margin; caudal filaments a faint yellowish tan. Nymph.—Length of body 7-8 mm. Head light yellow-brown, with lateral areas near eyes shaded with red-brown. Thorax light brown, yellowish laterally; legs light yellow- genitalia, figs. 202, 204, light brown; cauda
. Bulletin. Natural history; Natural history. M: 195.^ Burks: The AIayflies of Illinois 91 longitudinal veins of fore wing stained a faint yellow-brown. Abdomen uniformly red-brown, each segment with posterior margin slightly darkened; terminal abdom- inal sternite with a relatively shallow, broad, rounded, median excavation on posterior margin; caudal filaments a faint yellowish tan. Nymph.—Length of body 7-8 mm. Head light yellow-brown, with lateral areas near eyes shaded with red-brown. Thorax light brown, yellowish laterally; legs light yellow- genitalia, figs. 202, 204, light brown; caudal filaments uniformly tan. Female.—Length of body 5-6 mm., of fore wing mm. Coloration similar to that of male, except that red-brown re- places dark brown, and tan replaces light brown; all crossveins of fore wing, except those in anal and cubital areas, tan; cubital and anal crossveins of fore wing, and all crossveins in hind wing, hyaline; posterior margin of seventh abdominal sternite pro- duced posteriorly to form a long, pointed. Fig. 212.—Paraleptophlrhia praepedita, mature nymph, lateral aspect. brown, with brown shading near apexes of femora. Abdomen light brown, each tergite with two pairs of vaguely defined, light yellowish spots; gills hyaline, tracheae gray, with only a few, minute, lateral branches; posterolateral angles of tergites 8 and 9 produced as spines; caudal filaments light yellow-brown. Known from the northeastern and mid- western states and eastern Canadian prov- inces. Illinois Record.—Herod: Branch Big Grand Pierre Creek, May 2, 1946, Burks & Sanderson, 1 i . 3. Paraleptophlebia praepedita (Eaton) Leptophlehia praepedita Eaton (1884:99). ALale.—Length of body and of fore wing each mm. Head very dark brown, almost black; eyes in life dark red-brown; antennae brown, each becoming hyaline at tip of flagellum. Thorax very dark brown, with yellow-brown markings on pleura; legs usually uniformly light brown, femora some- times
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