Amphibolips nebris, n. sp.
Agamic form

Gall. — Color yellow tan and rosy russet, brigther when fresh, weathering dark to brown and grayish-black; very large, up to 70, mm., averaging near 55. mm. m diameter.

Host. — Qnercus Eduardi the shining, prickly-leaved, black live oak of the area, a close relative of the American Q. Emoryi.

Range. — Chihuahua: Parral, 12 W, 6800’ (types). Apparently confined to a southernmost portion of Chihuahua, replaced further north and west in the same state by elatus, and by jubatus and niger in Durango.

Life History. — Adults: March 20. April 5, 15, 22.

This insect, nebris, is known only from the single locality west of Parral, in southernmost Chihuahua. It is replaced to the north and probably throughout most of Chihuahua by elatus, and to the south, on most of the oaks in Durango, by jubatus, and on Q. incarnata in Durango by A. niger. But nebria is not closely related to elatas or jubatus, although it is very close to niger and still closer to pistrix from Zacatecas.

Nebris differs from niger in having the gall very distinctly larger.

- Alfred Kinsey: (1937) New Mexican gall wasps (Hymenoptera, Cynipidae). II^©