Provisional Key to Mature Male Larvae of Five California Capnia Species

1 Tergum 10 with 0.7-0.8 mm tubular posterior extension; developing tubular epiproct visible in pharate individuals (Figs. 15, 17, 34) ………… inyo

1’ Tergum 10 shorter than 0.5 mm, its posterior extension variably shaped (Figs. 4, 5, 6, 8, 10, 11, 12, 40, 55) ………………………………………….. 2

2 Posterior extension of 10 th tergum subtriangular in dorsal view, with wide-based developing epiproct visible in pharate individuals (Fig. 4); dorsal margin nearly straight in lateral view, with slightly upturned tip (Fig. 8) ……………… coyote

2’ Posterior extension of 10 th tergum with dorsal margin sharply upturned in lateral view (Figs. 5, 6, 40), or evenly downturned (Figs. 54-55), or nearly straight with slightly downturned tip (Fig. 10); developing epiproct in pharate individuals variously shaped (Figs. 5, 10, 12) ……………… 3

3 Base of tergum 10 extension with cross-striated surface, and in lateral view, with evenly downturned dorsal margin (Figs. 54-55) ... ventura

3’ Base of tergum 10 with smooth, unstriated surface ……………………………………………………… 4

4 Tergum 10 extension sharply upturned in lateral view (Figs. 5, 6, 40) ………………………….. teresa

4’ Tergum 10 extension with dorsal margin nearly straight, but with slightly downturned tip in lateral view ……………………………….. umpqua