Feron splendens (Weld, 1919), comb. nov.

Gall (Fig. 353). Single or scattered on the underside of leaf. Cylindrical with ends and middle slightly swollen, 2.0 mm in diameter and 3–5 mm high, with a crystalline appearance, covered with short stout blunt spines from which run faint decurrent ridges. Sessile, often lop-sided, spines more numerous on basal third. The gall is rosy red with a straw yellow band around the middle and some yellow at either end. The basal third is solid, with a thinwalled larval cell in the middle of the gall while the distal third or more is tubular with a slightly flared open end. The exit hole is in the hollow portion (Weld 1919).

Biology. Only the asexual generation is known, which induces leaf galls on Q. grisea, Q. turbinella, and Q. x undata (section Quercus, subsection Leucomexicana). Galls mature in late autumn; the larvae transform to adults in autumn but remain in the gall all winter and emerge the following spring in April–May.

Distribution. USA: AZ, NM (Burks 1979); Mexico: Chihuahua, Durango.

- Victor Cuesta-Porta, George Melika, James, A. Nicholls, Graham N. Stone, Juli Pujade-Villar: (2023) Re-establishment of the Nearctic oak cynipid gall wasp genus Feron Kinsey, 1937 (Hymenoptera: Cynipidae: Cynipini), including the description of six new species^©