Femuros integrum, n. sp.
Agamic form

Gall. — Small, narrowly cylindric, with the walls of the upper half of the gall quite thin and often puckered, nearly or entirely shut at top, although the cavity thus enclosed occupies more than a third of the whole gall; outside of gall silvery brown, with little or no bloom; diameter up to 7.0 mm., averaging nearer 6.0 mm.; length up to 10.0 mm., averaging nearer 8.0 mm.

Host. — Quercus potosina (types); Q. chihuahuensis; Q. undata; Q, reticulata [rugosa], Apparently one species on all these oaks; possibly found on still other white oaks in the area.

Range. — San Luis Potosi: San Luis Potosi, 15 W, 8000’ (types on Q. potosina. Also on Q. undata). Guanajuato: San Felipe, 20 SW, 8000’ (Q, chihuahuensis Leon, 20 NE, 9000’ (Q. reticulata). Probably restricted to a portion of the Western Sierra of Mexico including the western portion of San Luis Potosi and adjacent Guanajuato,

Life History. — No data available.

Integrum is the wide-ranging species of more central Mexico, from the state of San Luis Potosi south for some undetermined distance, it is most closely related to its more northern neighbor, geniale. The galls of the two are identical, small, and quite strictly cylindric.

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