Femuros repandae Kinsey, 1937
Femuros lusum Kinsey (1937a: 66)

Gall (Figs. 5d-e). Galls are spherical (10-20 mm in diameter), distorted mainly by the bracts, deformed leaves, and deformed (widened) petioles that are closely fused on the surface. They are located at the terminal part of the main or lateral twigs, solitary, rarely forming groups of two or three galls. They are unilocular, sessile, and hard. They usually have normal scales at the base. The surface is similar to the bark of the branch when mature; initially, they are greenish or have reddish tones. The larval chamber is central, separable, with a hard and thick wall (up to 7 mm in diameter); between the larval chamber and the external wall there is a spongy tissue, looser near the larval chamber.

Hosts. Quercus repanda Bonpland, 1809, and Q. laeta (Quercus section).

Biology. Only the asexual form is known. The galls develop from June and by December-January they already have a reddish color; adults emerge in April.

Distribution. Cited from the states of Hidalgo and Mexico City. This is the first record for Santa Fe (Mexico City) and the first record on Q. laeta.

- Uriel Barrera-Ruiz, Victor Cuesta-Porta, David Cibrian-Tovar, Aitor Martinez-Romero, Juli Pujade-Villar: (2021) Avispas agalladoras de los encinos de Santa Fe (Ciudad de México, México) (Hymenoptera, Cynipidae: Cynipini; Fagaceae)^©