. Memoirs of the American Entomological Society . 184 Figures 179-184. — /. denningi. 179. adult head and pronotum (scale: 1 mm =.06 mm). 180. female subgenital plate (1 mm = .03 mm). 181. sclerotizedaedeagal process, dorsal aspect (1 mm = .02 mm). 182. male paraproct, lateralaspect (1 mm = .02 mm). 183. male aedeagus, lateral aspect, A. large postero-ventral lobe, B. small posterior, bearing small, fine spinulae, C. sclerotized process,D. expanded dorsal lobe (1 mm = .01 mm). 184. male vesicle and 8th sternum(1 mm = .03 mm). MEM. AMER. ENT. SOC, 32 88 WESTERN ISOPERLA Distribution. — USA: Cal
. Memoirs of the American Entomological Society . 184 Figures 179-184. — /. denningi. 179. adult head and pronotum (scale: 1 mm =.06 mm). 180. female subgenital plate (1 mm = .03 mm). 181. sclerotizedaedeagal process, dorsal aspect (1 mm = .02 mm). 182. male paraproct, lateralaspect (1 mm = .02 mm). 183. male aedeagus, lateral aspect, A. large postero-ventral lobe, B. small posterior, bearing small, fine spinulae, C. sclerotized process,D. expanded dorsal lobe (1 mm = .01 mm). 184. male vesicle and 8th sternum(1 mm = .03 mm). MEM. AMER. ENT. SOC, 32 88 WESTERN ISOPERLA Distribution. — USA: California (Fig. 152). Diagnosis and Discussion. — This species is closely related to /.adunca. Males can be distinguished by the light interocellar area of thehead, darker wings and body, paraprocts wider at base and not deflecteddownward at apex, large expanded dorsal lobe on aedeagus bearing small,stout spinulae, sclerotized aedeagal process bifurcate at apex, and lack oflong, sharp hair-like spinulae on proximal aedeagal stalk. Females ca
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Keywords: ., bookcentury1900, bookdecade1910, booksubje, booksubjectentomology
