. Bulletin. Natural history; Natural history. May, 1953 Burks: The Mayflies of Illinois 185. Fig. 383. — Heptagema diahasla, mature nymph, dorsal aspect. abdomen uniformly dark brown, with mi- nute, submedian and anterolateral, light spots on tergites; abdominal sternites white, with a wide, brown, sublateral, longitudinal band near either lateral margin; gills, fig. 325, relatively slender, with filamentous tuft prominent and bushy, gills borne by seventh segment with well-developed, filamentous tuft; caudal filaments rather vaguely marked with alternating, narrow, dark and light color bands.
. Bulletin. Natural history; Natural history. May, 1953 Burks: The Mayflies of Illinois 185. Fig. 383. — Heptagema diahasla, mature nymph, dorsal aspect. abdomen uniformly dark brown, with mi- nute, submedian and anterolateral, light spots on tergites; abdominal sternites white, with a wide, brown, sublateral, longitudinal band near either lateral margin; gills, fig. 325, relatively slender, with filamentous tuft prominent and bushy, gills borne by seventh segment with well-developed, filamentous tuft; caudal filaments rather vaguely marked with alternating, narrow, dark and light color bands. Known from Illinois, Iowa, and Minne- sota. Illinois Records.—Cairo: July 12, 1948, L. J. Stannard, 1 $ . Dixon : June 25, 1947, B. D. Burks, 1 S . East Dubuque: July 3, 1946, Burks & Sanderson, 19. Freeport: June 10-11, 1948. Burks, Stannard, & Smith, Ic?. Havana: June 17, 1909, 19 ; June 1, 1933, at light, C. O. Mohr, 1 i ; White Oak Creek, near Matanzas Lake, June 2, 1940, B. D. Burks, 45, 19 ; Matanzas Beach, June 25, 1947, Ross & Stannard, 5 5, 29. Homer: July 4, 1943, H. H. Ross, \$. Homer Park: June 30, 1925, T. H. Frison, 1 9 . Jerseyville: June 2, 1938, T. H. Fri- son, \$. Kankakee: Aug. 3, 1938, Burks & Boesel, \$. Kappa: June 22, 1943, H. H. Ross, 1 $ . Mahomet: June 8, 1940, H. H. Ross, 1 $ . Mazon: Mazon Creek, June 25-27, 1938, B. D. Burks, 3 5,29. Milan : Rock River, June 4, 1940, Mohr & Burks, 55, 29. Momence: June 22, 1938, Ross & Burks, 15. Mount Carmel: June 18, 1947, B. D. Burks, 15, 19. Muncie: May 22, 1942, Ross & Burks, 1 $ . Peoria: June 23, 1938, F. F. Hasbrouck, 1 5 . Rock- fo.::d: June 12, 1938, at light, Ross & Burks, 1 5 ; June 29, 1938, at light, B. D. Burks, 15; June 11, 1948, Burks, Stannard, & Smith, 13 5, 19. St. Joseph: July 29, 1922, T. H. Frison, 1 9 . PULLA Group 3. Heptagenia pulla (Clemens) Ecdyurus grandis Clemens (1913:147). Nomen nudum. Ecdyurus pulliis Clemens (1913:330). Male.—Length of body
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
