segmented. A diagnostic feature of the larvae is the 

 location of the antennae midway between the eye and 

 the base of the mandibles (fig. 10:5;'). 



Key to Genera of Limnephilldae 



Known to Occur in California 



Adults 



1. Spurs 0-2-2 Desmona Denning 1951 



— Spurs 1-2-2, 1-3-3, or 1-3-4 2 



2. Maxillary palpi abnormally long in both d" and $ (fig. 

 10:25^) " Chyranda Ross 1944 



— Maxillary palpi normal 3 



3. Front \vings with Sc ending in a straight, oblique cross 

 vein (fig. 10:26a) Apatanla Kolenati 1848 



— Front wings with Sc not ending in an oblique cross 

 vein 4 



4. M 1+2 in hind wings undivided 



Neophylax McLachlan 1871 



— Mita in hind wings divided into M, and M 2 5 



5. Vertex covered with close, appressed silky hairs . . 



Hesperophylax Banks 1916 



— Vertex not covered with silky appressed hairs 6 



6. Front wings with short rounded stigma, Rj curved, 

 parallel with R, (fig. 10:266) 7 



— Front wings with long narrower stigma if well marked, 

 R a not parallel with R^ 8 



7. Front wings with well-marked longitudinal silvery 

 line (fig. 10:266) Psychoglypha Ross 1944 



— Front wings with no longitudinal silvery line 



Glyphopsyche Banks 1904 



8. Clasper of male segmented (fig. 10:26;') 9 



— Clasper of male not segmented (fig. 10:28c) 10 



9. Discal cell (first R 3 ) of fore wing short, fork of R at3 in 

 hind wing near wing margin . . . Pedomoecus Ross 1947 



— Discal cell (first R 3 ) of fore wing long, fork of R a+3 in 

 hind wing arises at discal cell 



Dicosmoecus McLachlan 1875 



10. Mesoscutal warts on mesonotum poorly defined, repre- 

 sented by a linear area of setae (fig. 10:26c) 11 



— Mesoscutal warts on mesonotum ovate and well defined, 

 (fig. 10:26/) 12 



11. Ninth tergite broad, usually forming a wide band with 

 remainder of 9th segment (fig. 10:29a) 



Lenarchus Martynov 1913 



— Ninth tergite reduced to a thin bridge (fig. 10:28a) . 



Limnephilus Leach 1815 



12. Last tarsal segment of all legs without black spines, 

 apex of front wing rounded Drusinus Betten 1934 



— Last tarsal segment of at least 1 pair of legs with 

 1 or more short black spines 13 



13. Hind wings with hooks along costal margin, spurs 

 1-3-3 Oligophlebodes Ulmer 1905 



— Hind wings with no hooks along costal margin, spurs 

 1-3-4 14 



14. Dorsal surface of 8th tergite reticulated (fig. 10:31c) 



Hydatophylax Wallengren 1891 



t- Dorsal surface of 8th tergite not reticulated 15 



15. Claspers extending caudad to apex of male genitalia 

 (fig. 10:26A) Clostoeca Banks 1943 



— Claspers do not extend caudad as far as any other 

 part of male genitalia (fig. 10:29Z) 



Ecclisomyia Banks 1907 



Genus Apatania Kolenati 1848 



About eleven species have been placed in this genus 

 with only a single species, A. sorex Ross 1941 (fig. 

 10:26a?) (Plumas County), recorded from California. 

 The majority of the species are found in the Arctic 

 region or at high elevations. 



259 

 Denning: Trichoptera 



Genus Pedomoecus Ross 1947 



The genus Pedomoecus contains hut one |" 

 known only from California, /'. nirrra Ross 1947 

 (fig. 10:26y) (Mono and Fresno counties). The gen US 

 appears to be closely related i<> Dicosmoecus, espe- 

 cially in having segmented claspers, and is a member 

 of the subfamily Dicosmoecinae. 



Genus Dicosmoecus McLachlan 1875 



The genus is represented in the West bj several 

 spacies; all these are large, varying from light brown 

 to blackish in color. The wings are broadly rounded 

 and the surface is granulated. Dicosmoecus larvae 

 are found in lakes or large, slowly moving streams. 

 Two fairly common species are known to occur in 

 California. These may be separated on the basis of 

 the male genitalia. About fifteen species have been 

 placed in the genus, but the species are poorly de- 

 fined and the genus is in need of revision. 



atripes (Hagen) 1875 (fig. 10:26t) 

 unicolor (Banks) 1897 (fig. 10:26;') 



Placer County 

 Inyo, Shasta 



Genus Chyranda Ross 1944 



At present only one species, C. centralis (Banks) 1900 

 (fig. 10:26e) (Shasta and Lassen counties), is known. 

 The very long maxillary palpi (fig. 10:25^) distinguish 

 this genus from others. 



Genus Clostoeca Banks 1943 



The genus Clostoeca contains only two species, both 

 limited to the West and both found in California. 



disjunctus (Banks) 1914 



(fig. 10:26A) 

 sperryae Banks 1943. 



This species is poorly defined. 



San Bernardino, Marin 

 Siskiyou County 



Genus Desmona Denning 1954 



Only a single species, D. bethula Denning 1954 (fig. 

 10:27J) (Plumas and Sierra counties), has been re- 

 ferred to this genus. 



Genus Hesperophylax Banks 1916 



Records of only three of the six Nearctic species 

 are available. The large, often cylindrical cases, 

 constructed of small stones, are quite conspicuous 

 and often occur in abundance in clear, swiftly flowing 

 streams (fig. 10:2/). All described species have a 

 longitudinal silvery stripe on the front wings, and 

 the vertex and anal portions of the front wings are 

 covered with appressed silky hair. 



