. Bulletin. Natural History; Natural History. September, 1942 das Gefängnis: North American Plecoptera 259 Clark County, West Branch Sturgeon River: Juli 3, 1938, J. W. Leonard, 2 < 5, 29. Montmorency County, Jagd Creek: Nov. 30 - Sept. 3, 1940, J. W. Leonard, 3^, 1 $. Missouri. - Greer Frühling: Juni 7, 1937, H.H.Ross, 2 c^, 29. New Brunswick. - Peticodiac: August 21, 1939, T. H. Gefängnis k T. H. Gefängnis, jr., 105. Anagance: August 21, 1939, T. H. Gefängnis &Amp; T. H. Gefängnis, jr., 2 $, 5 9-New York. - Caroline, wilde Plower Re-serve: August 16, 1928, T. H. Gefängnis, 16. Stratford, trammell Creek: Juli 19, 1934,

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. Bulletin. Natural history; Natural history. September, 1942 Prison: North American Plecoptera 259 Cheboygan County, west branch Sturgeon River: July 3, 1938, J. W. Leonard, 2 <5 , 29. Montmorency County, Hunt Creek: Aug. 30- Sept. 3, 1940, J. W. Leonard, 3^, 1$. Missouri.—Greer Spring: June 7, 1937, H. H. Ross, 2c^ , 29. New Brunswick. — Peticodiac: Aug. 21, 1939, T. H. Prison k T. H. Prison, Jr., 105 . Anagance: Aug. 21, 1939, T. H. Prison & T. H. Prison, Jr., 2$, 5 9- New York.—Caroline, Wild Plower Re- serve: Aug. 16, 1928, T. H. Prison, 16. Stratford, Trammel Creek: July 19, 1934, H. K. Townes, 1$ , 2 9- Nova Scotia. — Moser River, Goldmine Brook: July 29, 1939, J. A. C. Nicol, 2$, 29- Chester Basin: Aug. 23, 1939, T. H. Prison & T. H. Prison, Jr., 4$, 79, 5 nymphs. Ingramport: Aug. 22, 1939, T. H. Prison & T. H. Prison, Jr., 19- Ontario.—Algonquin Park, Costello Lake: June and July, 1938, and June, July and August, 1939, W. M. Sprules, 6 6, 9 9. Tennessee. — Chimneys Camp Grounds, Great Smoky Mountains National Park: July 21, 1939, A. C. Cole, 16 . Several nymphs show remnants of anal gills as first recorded for claasseni (Frison 1935(7) and also as noted for nymphs of decepta Claassen in this paper. Evidently such anal gills are to be expected in many if not all nymphs of Leuctra. They are very easily overlooked because of their delicate nature and are probably usually lost in handling. Leuctra occidentalis Banks (1907) Leuctra purcellana Neave (1934) Leuctra forcipata Frison (1937) Leuctra sara Claassen {9ilb) The study of a large series of specimens of any stonefly species is almost certain to show that slight variations of some struc- tures in most species, and more in others, are to be expected. The genus Leuctra presents a group of species with very con- spicuous morphological differences in most of the males named to date and less distinc- tive differences in the females. One of the first described and a common western speci

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• booka
• bookcentury1900
• bookdecade1910
• booksubjectnaturalhistory