252 



Denning: Trichoptera 



Fig. 10:21. Mole genitalia, a, Arcfopsyche ca//forn/ca, lateral; 

 b, Arcfopsyche grandis, lateral; c, Homop/ecfra nign'pennis, 

 lateral; d, Arcfopsyche inermis, lateral; e, Homop/ectro shasta, 

 lateral; e lf aedeagus, lateral; f, Homop/ectro oaklandensis, 

 aedeagus, lateral; g, Smicridea utico, lateral; h, Homop/ecfra 

 spora, lateral; h lf aedeagus, lateral (a,d. Denning, 1950o; b, 

 Ross, 1938c; c. Ling, 1938, unpublished fig.; e. Denning, 1949c; 

 f.h, Denning, 1952; g, Ross, 1947). 



— Dorsal spine at base of aedeagus in a nearly hori- 

 zontal position, not much above remainder of structure 



3 



3. Dorsal spine subdivided at apex alseae Ross 1938 



— Dorsal spine furcate near the base (fig. 10:2 le); Shasta 

 County shasta Denning 1949 



4. Lateral spur of armature of aedeagus directed ventrad 

 (fig. 10:21A); Santa Cruz and San Mateo counties . . . 



spora Denning 1952 



— Lateral spur of armature of aedeagus directed caudo- 

 dorsad (fig. 10:21/); Alameda County to Santa Cruz 

 County oaklandensis (Ling) 1938 



Fig. 10:22, Male genitalia of Parapsyche. a, o/mofa, lateral; 

 b, spinata, lateral; b,, tenth tergite, dorsal; c, exfensa, lateral; 

 c„ aedeagus, lateral; d, elsis, lateral (a, Ross, 1938; b. Denning, 

 1949; c. Denning, 1949o; d, Milne and Milne, 1938). 



Genus Parapsyche Betten 1934 



This is a small genus represented by six Nearctic 

 species. Two species are restricted to the East and 

 four are found in the West. 



Key to the Adult Males 



l.Clasper long, slender, somewhat sinuate, extending 

 caudad almost as far as apex of 10th tergite (fig. 



10:22a?); Shasta County to Fresno County 



elsis Milne 1936 



— Clasper short, either quadrate or quadrangular 2 



2. Clasper with the main body quadrate, bearing a short 

 distoventral digitate process (fig. 10:226); Tulare 

 County spinata Denning 1949 



— Clasper with the main body short, about the same 

 width throughout 3 



3. Clasper with short acute thumblike process, dorso- 

 distal corner rounded (fig. 10:22a); Shasta County to 

 San Bernardino County almota Ross 1938 



— Clasper with truncate thumblike process almost half 

 length of structure, dorsodistal corner truncate (fig. 

 10:22c); Shasta County extensa Denning 1949 



Genus Smicridea McLachlan 1871 



Only one of the three species in this genus is known 

 in California where occasionally it occurs in abun- 

 dance. The single California species is Smicridea 

 utico Ross 1947 (fig. 10:21^) (Imperial County). 



Genus Cheumatopsyche Wallengren 1891 



This is the second largest genus in the family and 

 contains about thirty Nearctic species. At present 



