File:Aquatic insects of California, with keys to North American genera and California species (1956) (19748551655).jpg

Title: Aquatic insects of California, with keys to North American genera and California species
Identifier: aquaticinse00usin (find matches)
Year: 1956 (1950s)
Authors: Usinger, Robert L. (Robert Leslie), 1912-1968
Subjects: Aquatic insects; Insects
Publisher: Berkeley, University of California Press
Contributing Library: University of Connecticut Libraries
Digitizing Sponsor: LYRASIS Members and Sloan Foundation

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256 Denning: Trichoptera
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Fig. 10:26. Distinguishing structures of adult Trichoptera. a, Apatania stigmafella, front wing; b, Psychoglypha ovi'go, front wing; C, Limnephilus submonilifer, head and thorax; d, Apatania sorex, male genitalia, lateral; a1,, male genitalia, ventral; e, Chyranda centralis, male genitalia, lateral; e,, aedeagus; f, Pycnapsyche subfasciata, head and thorax; g, Pedomoecus sierra, male genitalia, lateral; g,, aedeagus; ft, C/osfoeca disjunctus. The male genitalia are distinctive for each of the species. acoma Denning 1947 (fig. 10:25/) argosa Ross 1938 (fig. 10:25*) rono Ross 1941 (fig. 10:25i) xera Ross 1938 (fig. 10:25;') Santa Clara County Siskiyou County Humboldt to Tuolumne Mono to Shasta Family PHRYGANEIDAE Caddis flies belonging to this family are generally large, seldom less than 12-14 mm. in length. Seven genera containing twenty-nine species are known from the United States and Canada. The larvae are generally found among submerged plants in lakes and marshes, but a few species are found in slowly flowing streams. The larval cases (fig. 10:2a) are generally long and built in a spiral. The family is very poorly represented in California, there being only three genera and three species recorded to date. Key to the Genera1 Adult males 1. Ninth sternite produced caudad as a shelf beyond the base of the claspers Ptilostomis Kolenati 1859 — Ninth sternite not shelflike 2 2. Clasper short, biscuit-shaped, produced caudad into a short, slightly upturned point Phryganea Linneaus 1758 — Claspers produced dorsad .into a prominent process 3 3. Tenth tergite consisting of 2 long, black sclerotized rods Eubasilissa Martynov 1930 — Tenth tergite not rodlike 4 4. Hind wings mostly black except for yellow reticulations near apex Oligostomis Kolenati 1848 — Hind wings with only black spots on a gray or clear ground color 5 5. Ninth tergite forming a transverse, somewhat hood- shaped area, and bearing a brush or pair of brushes of long setae Agrypnia Curtis 1835 — Ninth tergite continuous with outline of 10th tergite, usually not bearing long setae 6 6. Middle tibiae thorny, the black spines very prominent; wings shiny with black markings Banksiola Martynov 1924 — Middle tibiae not thorny, the black spines not prom- inent, wings dull, tawny brown Fabria Milne 1934 1. Frons with a median black line 2 — Frons without a median black line 3 2. Pronotum with anterior margin black, and without a diagonal black line Phryganea Linneaus 1758 — Pronotum with a diagonal black line, anterior margin mostly yellow Banksiola Martynov 1924 "Adapted from Ross (1944). "After Ross (1944). male genitalia, lateral; fit, aedeagus; i, Dicosmoecus atripes, male genitalia, lateral; /',, aedeagus, /', Dicosmoecus unicolor, male genitalia, lateral; /'„ aedeagus; k, Agrypnia glacialis, male gentalia, lateral; k„ dorsal view (o-c,f, Ross, 1944; d,g, Ross, 1941; e,h-j, Ross, 1938; k. Celeste Green, 1955).

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