Neuroterus argentatus

Quercus oblongifolia, gambelii, subturbinella [turbinella]
Leaf galls
Detachable
Fig 82.

Neuroterus argentatus, new species

Host: Quercus gambelii

Gall (pl. 2, fig. 10).— Ellipsoidal, dark colored, 1.2 by 0.9 mm. by 0.6 mm. high, firmly attached to underside of leaf in numbers close to main veins. Each is covered, except in center where there is a slight papilla, with radiating straight silvery single-celled hairs about 0.5 mm. long. Exit hole near one end.

Habitat. — The type material was collected by Mrs. N. W. Capron in Oak Creek Canyon, Ariz., in November 1937 when adults were then emerging. Galls were seen at Grand Canyon also. Similar galls were collected on Q. subturbinella at Camp Creek and Mayer, Ariz.

Neuroterus argentatus
Starburst-gall wasp

Hosts: Quercus oblongifolia, turbinella, gambelii

They are distinguished by stiff, mostly lateral spines or bristles that radiate from the larval chamber, which is also covered with micro-hairs.