. Bulletin. Natural history; Natural history. $SUBGEN1TAL PLATE (JAbDOMINAL TERCTES. d Abdominal segments Fig. 120.—Hastaperla bre-vis. 1935^, fig. 331) is quite satisfactor}-, but the illustrations of the most important structural details of the adults are poor, and new ones, figs. 115 and 120, are here- with presented. Specimens of this species, and records asso- ciated with them, have been studied as fol- lows. Arkansas.—Benton, Salt Creek: April 15, 1939, H. H. & J. A. Ross, 1 nymph, 1$. Mal- vern, southwest of town: April 15, 1939, H. H. & J. A. Ross, 1 i . MouNTAiNBURG, Clear Cre
. Bulletin. Natural history; Natural history. $SUBGEN1TAL PLATE (JAbDOMINAL TERCTES. d Abdominal segments Fig. 120.—Hastaperla bre-vis. 1935^, fig. 331) is quite satisfactor}-, but the illustrations of the most important structural details of the adults are poor, and new ones, figs. 115 and 120, are here- with presented. Specimens of this species, and records asso- ciated with them, have been studied as fol- lows. Arkansas.—Benton, Salt Creek: April 15, 1939, H. H. & J. A. Ross, 1 nymph, 1$. Mal- vern, southwest of town: April 15, 1939, H. H. & J. A. Ross, 1 i . MouNTAiNBURG, Clear Creek: May 1, 1939, H. H. & J. A. Ross, 1$. Mountain Pine: June 5, 1937, H. H. Ross, $$, 5$. Washington County: Mav 3, 1939, 1$. WiNSLOw: May 1, 1939, H. H. & J. A. Ross, 16, 2 $ . Illinois.—Shawnee National Forest, Union CountN', Hutchin's Creek: April 8, 1938, Frison & Mohr, 10 nymphs. Mountain Glen, Union County, Hutchin's Creek, near town: April 24, 1938, C. O. Mohr, 7 c$ , 10$, 1 nymph, 2 exuviae, 3$ (reared). Serena, Indian Creek: May 19, 1938, Ross & Burks, 29- Wolf Lake, Union County, Hutchin's Creek: Mav 2, 1940, Mohr & Burks, 1 nvmph; Mav 7, i940, Mohr & Burks, 1 c5 with 1 exuvi'a (reared) ; May 12, 1939, Burks k Riegel, 1$, 1 nymph, 4 exuviae; May 1-1—15, 1940, Mohr & Burks, $ $, 9 9; May 25, 1940, Mohr k Burks, 19. Indiana.—Turkey Run State Park: May 30, 1930, Frison & Ross, 1 9 ; in gorge, Mav 22, 1932, T. H. Frison, 1 9 ; Newby Gulch, May 6, 1933, Mohr & Townsend, nvmphs; May 11, 1933, Frison & Mohr, 66 '(reared), 6 6, 9 9 ; Newby Gulch, May 11, 1933, Frison & Mohr, nymphs, i i , 9 9; reared at Charles- ton, 111., May 12, 1933, Frison & Mohr, 16, 19; Newby Gulch, May 12, 1933, Mohr & Frison, nymphs; Sugar Creek, May 7, 1939, G. T. Riegel, 3 nymphs; small tributary stream, Mav 7, 1939, G. T. Riegel, 4 nvmphs; Newby Gulch, April 9, 1940, Frison & Ross, 5 nymphs. Kentucky. — Cumberland Falls State Park:
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
