From the heart of the Sierras, in California, comes a new mosquito of the genus Taeniorhynchus, which is here described:

Taeniorhynchus Sierrensis, n. sp.—æ. Head brown, a median line of white curved scales extending up between the eyes, immediately followed laterally by a patch of flat brown scales, a narrow white stripe laterad, followed by a brown stripe, narrow white line around the eyes, white forked and curved scales on the occiput; the general effect is of two brown submedian spots, and the curved scales are confined to this comparatively narrow median line; antennæ brown, and white not really banded, giving the effects of white bands, verticels brown, pubescence white, basal joint white scaled; palpi brown with white tips, and a narrow light band about midway; proboscis dark brown, clypeus brown, eyes brown.