Disholcaspis canescens
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This cynipid wasp induces densely hairy, monothalamous, detachable, round, silvery, slightly mottled bud galls on blue and scrub oaks. The silvery-gray bloom that covers the galls rubs off easily.

Hosts:
Quercus douglasii
Quercus berberidifolia

Disholcaspis canescens

Quercus douglasii, dumosa, durata
Stem galls, detachable from the twig
Globular bullet, dia. 10 mm., single, surface slightly tuberculate with mealy bloom when fresh. Adults in Feb.

Holcaspis canescens Bassett

Gall. In clusters on the branch of a species of dwarf oak (Quercus sp.) Rounded, hard, and woody, with a blunt spur at the apex. Resembling dwarf specimens of Holcaspis duricoria, though the surface is more hoary. Internally, there is a single larval cell, attached to the gall, but can be detached without breaking; around the cell there is a thin layer of rusty brown, and outside this a light gray color prevails. Diameter 10 mm.

Habitat. California.

The type is in the American Entomological Society.