Neuroterus decipiens, new species

GALLS (P1. XXIV; Fig. 9).-Clusters of egg-like cells in the leaf-blade. Each cell monothalamous, oval, about 1.7 mm. long by 1.0 mm. wide, thin-walled, entirely hollow, equally protruding from either surface of the leaf; leaf-green, drying brownish yellow. In dense, compacted clusters containing many scores of cells; on young leaves of Quercus Douglasii.

RANGE.-California: Stanford University (I. C. McCracken, Coll.), Three Rivers, and Redding.

This species is very abundant early in the spring; the galls are very succulent and the insects mature quickly after the unfolding of the leaves. There must be, therefore, another generation in the year, probably agamic. Insects were emerging at Three Rivers on March 22, but some hundred miles farther north, at Redding, adults did not emerge until some time after collection of the galls on April.2. Of 93 adults of my collection, only 14 are males, not the usual ratio for bisexual generations of this genus. Material of this species is in several collections labelled Neuroterus pacificus Beutenmuller, but this is obviously not that species.

- Alfred Charles Kinsey: (1922) New Pacific Coast Cynipidae (Hymenoptera)^©