Disholcaspis lacuna, new species

Host.--Quercus gambelii

Gall.--Globular bullet galls in clusters at base of strong sprouts similar to those of Disholcaspis terrestris on Quercus stellata. When fresh the galls are yellowish tinged with more or less rosy red, fleshy, 12-20 mm in diameter, often distorted by mutual pressure. Inside there is a distinct but not loose thin-walled white larval cell.

Locality.--AZ, NM

Type locality.- — Williams, Arizona. The type galls were collected August 1, 1916, and living adults were cut out of them on September 15, 1916. Similar galls were collected at Flagstaff, July 25, Grand Canyon, July 27, and near Monument Rock in the canyon east of Santa Fe, New Mexico, on July 18. Old galls were seen at Prescott, Arizona, April 14, 1918, and on June 27, 1918, at Soldier Camp in the Santa Catalina Mountains, both old and fresh ones, the latter in all stages of growth, only a few being full grown.

Disholcaspis lacuna

Quercus gambelii
"Root" galls
Fig 3.

Disholcaspis lacuna
Clustered-gall wasp
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Hosts: Quercus gambelii

Fresh galls measure 12-20 mm in diameter and appear fleshy, yellow at the base, and red-flushed near the top.

Range: Near Strawberry Point near Dear Creek Village, UT, and Coconino Forest, AZ.