FIGURES 1–4 in Descriptions of the larvae and pupae of Sisko Ross with notes on western Dolophilodes Ulmer larvae (Trichoptera: Philopotamidae)

FIGURES 1–4. Variation in Sisko larval head capsules and mandibles, dorsal. 1) Form 1: California, Humboldt County, perennial creek, head width 0.6 mm. 2) Form 2: Oregon, Curry County, perennial creek, head width 0.5 mm. 3) Form 3: California, Humboldt County, seasonal creek, head width 0.7 mm. 4) Form 4: California, Trinity County, seasonal creek, head width 0.7 mm.