Eigth examples bred from larvæ in the Yosemite Valley differ from Mr. Cresson's description in having both wings unifrom smoky blackish, about as dark as the hind wings of Hylotoma scapularis, Klug. In the ♀, the pale parts of the legs are not white, but of an obscure sordid whitish, tinged with brown, and not contrasting with the black body parts; the abdomen is obscurely banded with brwon between the segments.