. Bulletin. Natural history; Natural history. <S Tergites IITALIA"^ Fig. 72. Hydrofisyche aeraui cised on meson to form a circular area almost surrounded by a pair of rounded processes. Female.—Length 10 mm. Darker than male; similar to light females of phalerata and hageni, with which aerata usually occurs. Structure identical with that oi cornuta. Holotype, male.—Aurora, Illinois: Tulv 17, 1927, at light, T. H. F. & R. D. G. Allotype, female.—Kankakee, Illinois: Aug. 8, 1(W5, Ross & DeLong. Paratypes.—Illinois.— Kankakee: Aug. 1, , along Kankakee River, Ross & Mohr,
. Bulletin. Natural history; Natural history. <S Tergites IITALIA"^ Fig. 72. Hydrofisyche aeraui cised on meson to form a circular area almost surrounded by a pair of rounded processes. Female.—Length 10 mm. Darker than male; similar to light females of phalerata and hageni, with which aerata usually occurs. Structure identical with that oi cornuta. Holotype, male.—Aurora, Illinois: Tulv 17, 1927, at light, T. H. F. & R. D. G. Allotype, female.—Kankakee, Illinois: Aug. 8, 1(W5, Ross & DeLong. Paratypes.—Illinois.— Kankakee: Aug. 1, , along Kankakee River, Ross & Mohr, Icf; May 26, 1935, Ross & Mohr, cage no. 3, Icf; June 6, 1935, Ross & Mohr, 78d', 429; July 21, 1935, Ross & Mohr, lid'; Aug. 8, 1935, Ross & DeLong, Id'. Momence: May 26, 1936, along Kankakee River, Ross, Icf; Aug. 4, 1936, Prison & Burks, 4c?: Aug. 21, 1936, Ross & Burks, \&. Mount Carmel: July 3, 1906, IcT. Wilmington: May 12, 1935, Prison & Ross, lOc?, 79; May 17, 1935, along Kankakee River, H. H. Ross, 37cr, 109; June 6, 1935, Ross & Mohr, 7cr; July 1, 1935, De Long & Ross, Icf; Aug. 20, 1935, DeLong & Ross, 2 c?'. Indiana.—Shoals: Sept. 10, 1936, White River, Ross & Burks, 61 cf, 259. Hydropsyche leonardi new species This species is very closely related to hageui Banks but differs in the shorter and thicker apical projection of the Oedagus Fig. 73.—Hydropsyche leonardi oedagus beyond the ventro-mesal cav- ity. Male.—Length 12 mm. Color iden- tical with that of corniita. General structure as described tor corniita ex- cept for the eyes, which are as large as those in sunnUins. Genitalia as in fig. 73. Ninth and tenth tergites almost identical with those illustrated for cornuta, the apex of the tenth tergite not upturned and only slightly emarginate on the meson. Claspers with basal segment slightly sinuate and slightly enlarged at apex; apical segment twice as wide as great- est length, the dorso-apical angle
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