Callirhytis lentiformis, new species

Host. —Quercus agrifolia Nee.

Gall (Fig. 1F).—A spherical, deciduous, bud gall that drops to the ground in October. The galls resemble the galls of Callirhytis agrifolia Bassett but are much smaller and quickly shrivel to a biconvex, lens-shaped gall 3.5 mm in diameter. The galls contain large larvae at the time they drop from the tree but adults do not emerge until the following summer (July, August and September).

Locality.— The type and paratypes were collected from Quercus agrifolia Nee growing in the San Gabriel Mountains north of Pasadena, California.