246 



Denning: Trichoptera 



Fig. 10:13. Mole and female genitalia, a, G/ossosoma ca/i'rVco, 

 lateral; o lf aedeagus, ventral; b, G. mereca, lateral; c, Po/aea- 

 gapetus nearcticus, lateral; d, Anagapetus chandleri, lateral; 

 e, G/ossosoma pferna; f, Agapetus arcita, lateral; f u claspers, 

 ventral; f 2 , female genitalia, lateral; g, Protoptila coloma, lateral; 

 h, Agapetus celatus, lateral; h lf tenth tergite, dorsal; h 2 , claspers,. 

 dorsal (a,b, Denning, 1948b; c, Banks, 1936; d, Ross, 1951a; 

 e, Ross, 1947; f". Denning, 1951; g, Ross, 1941; h, Kimmins and 

 Denning, 1951). 



dark brown or blackish in color. Distinguishing char- 

 acters are found in the male genitalia. 



The larvae construct dome-shaped cases of small 

 stones (fig. 10:2A); at pupation the case is cemented 

 to the side of a stone or other submerged object and 

 occasionally may be found in large numbers in 

 streams. 



Key to Adult Males 



1. Cerci elongate, apically a long curved rod 2 



— Cerci short, curved, spinelike; or slender and finger- 

 • like 3 



2. Apex of 10th tergite acute, apex of clasper blunt 

 (fig. 10:13e); Santa Cruz County. . . . pterna Ross 1947 



— Apex of 10th tergite enlarged, apex of clasper atten- 

 uated (fig. 10:13a); Inyo, Sierra, Placer, and Mono 

 counties califica Denning 1948 



3. Cerci slender, fingerlike; apex of 10th tergite hooked 

 (fig. 10: 12c); Siskiyou to Mariposa counties 



oregonenae Ling 1938 



— Cerci short, curved, spinelike 4 



4. Clasper prominent, apex acute and curved (fig. 10:126); 

 Shasta County bruna Denning 1954 



— Clasper with apical part narrowed, directed caudad 

 (fig. 10:136); Tuolumne County., mereca Denning 1948 



Genus Anagapetus Ross 1938 



Only four species have been placed in this genus 

 and all are restricted to the West. At present only 

 a single species, Anagapetus chandleri Ross 1951 

 (Mariposa County), is recorded from California (fig. 

 10:13d). 



Genus Palaeagapetus Ulmer 1912 



Three species are known from the Nearctic region, 

 one species being eastern and the other two western 

 in distribution. The members of this genus are uni- 

 formly blackish and about 4 mm. in length. The only 

 species found in California is Palaeagapetus nearcti- 

 cus Banks 1936 (Tuolumne County to Tulare County) 

 (fig. 10:13c). 



Genus Protoptila Banks 1904 





All members of this genus are small and dark-colored; 

 they resemble the Hydroptilidae in general appearance 

 and action. The long fringe of hairs on the anal 

 margin of the wing is a character also found in the 

 family Hydroptilidae. Although about a dozen Nearctic 

 species are known, and several of these are western 

 in distribution, only a single species, Protoptila 

 coloma Ross 1941 (Siskiyou County to Mono County), 

 has thus far been recorded from California (fig. 

 10:13o). Doubtless several additional species will 

 be collected. 



Genus Agapetus Curtis 1834 



Of the twenty-three Nearctic species, six have been 

 taken in California. The adults of all the species 

 resemble each other in small size and general appear- 

 ance; distinguishing characteristics seem to be 

 largely restricted to the male genitalia. 



Key to Adult Moles 



1. Clasper directed dorsad, apex acute (fig. 10:13/); 

 Riverside County arcita Denning 1951 



