. Memoirs of the American Entomological Society . ra Co., Oakhurst,26/V/1942, A. J. Watz, 1 $ (CAS); Yosemite Co., Yosemite Valley, 5/VII/1927,E. J. Nast, 1 $ (CAS). MONTANA: Ravalli Co., Hwy. 93, mi. N. of Ham-ilton, Bitterroot R., 23/VII/1965, 2 9 (RWB). OREGON: Benton Co., 9 mi. N. of Figures 228-235. — Cascadoperla trictura. 228. adult head and pronotum(scale: 1 mm = .08 mm). 229. nymph head and pronotum (1 mm = .08 mm).230. male terminalia, dorsal aspect (1 mm = .02 mm). 231. male aedeagus, lateralaspect, A. posteroventral band of small, fine spinulae, B. posterodorsal patch of long,f
. Memoirs of the American Entomological Society . ra Co., Oakhurst,26/V/1942, A. J. Watz, 1 $ (CAS); Yosemite Co., Yosemite Valley, 5/VII/1927,E. J. Nast, 1 $ (CAS). MONTANA: Ravalli Co., Hwy. 93, mi. N. of Ham-ilton, Bitterroot R., 23/VII/1965, 2 9 (RWB). OREGON: Benton Co., 9 mi. N. of Figures 228-235. — Cascadoperla trictura. 228. adult head and pronotum(scale: 1 mm = .08 mm). 229. nymph head and pronotum (1 mm = .08 mm).230. male terminalia, dorsal aspect (1 mm = .02 mm). 231. male aedeagus, lateralaspect, A. posteroventral band of small, fine spinulae, B. posterodorsal patch of long,fine, hair-like spinulae, D. dorsal nipple-like lobe (1 mm = .02 mm). 232. nymphallabrum (1 mm = .02 mm). 233. nymphal left maxilla, A. stipe, B. lacinia, C. apicaltooth (1 mm = .03 mm). 234. male terminalia, lateral aspect, A. paraprocts, hooks, C. median bipartite spinulae patch of 9th tergum (1 mm = .02 mm).235. female 8th sternum with mesoposterior nipple-like subgenital plate (1 mm =.04 mm). S. W. SZCZYTKO & K. W. STEWART 109. lAniifiifr-^- 234 MEM. AMER. ENT. SOC, 32 110 WESTERN ISOPERLA Corvallis, Berry Crk., 16/V/1960, Collector ?, 1 S, 1 exuviae (SJ), Alsea R.,24/V/1939, Pillow, 1 2 (INHS), Hwy. 34 above Alsea, Rock Crk., 27/V/1977,S. W. Szczytko and K. W. Stewart, 4 $,2 2,1 nymph (SWS & NTSU), Oak Crk.,4/V/1934, E. E. Ball, 2 nymphs (INHS), Kings Valley Trib. of Luckiamute R.,ll/V/1933, Prentiss and Dimick, 1 nymph (INHS); Clatsop Co., Necanicum R.,14/VI/1948, S. G. Jewett, 2 $ (BS), Youngs R., 10/V/1947, S. G. Jewett, 1 $(OS2), Necanicum R., 13/VI/1948, S. G. Jewett, 3 $ (SGJ), Big Crk., 28/V/1949,S. G. Jewett, 35 $, 33 2 (SJ); Clackamas Co., Mollala R., 13/VI/1948, S. , 1 $ (INHS); Linn Co., Lacomb, Crabtree Crk., 4/VI/1935, R. Dimick,1 $ (INHS); County ?, Willamette R., 26/V/1938, C. Jensen, 1 2 (INHS).WASHINGTON: Grays Harbor Co., Hamptulips, Hwy. 101, Hamptulips R., 18/VI/1967, R. W. Baumann, 1 $ (RWB); King Co., Cedar Falls, Cedar R., 22/VI/19
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