The genus Synergus Hartig (Hymenoptera: Cynipidae: Synergini) in the New World: a complete taxonomic revision with a key to species Author Lobato-Vila, Irene Author Pujade-Villar, Juli 0000-0001-7798-2717 jpujade@ub.edu text Zootaxa 2021 2021-01-12 4906 1 1 121 journal article 8839 10.11646/zootaxa.4906.1.1 308129a3-a99f-4012-bb41-d3220692c398 1175-5326 4434000 09383AAD-8E30-4E50-A533-C6DA4D00E33C Synergus flavens McCracken & Egbert, 1922 Synergus flavens McCracken & Egbert, 1922 . Stanford Univ., Pubs., Univ. Ser. Biol. Sci. 3 (1): 55. Type material: CAS ( lectotype ), paralectotypes in USNM . Synergus variegatus McCracken & Egbert, 1922 . Stanford Univ., Pubs., Univ. Ser. Biol. Sci. 3 (1): 51 (in part). Type material (in part): CAS. Synonymized by Lobato-Vila et al . (2020c: 16) . Diagnosis . See Lobato-Vila et al . (2020c: 17) . Distribution . USA : California ( McCracken & Egbert 1922 ; Lobato-Vila et al . 2020c ). Biology . Reared from galls of Heteroecus flavens ( McCracken & Egbert, 1922 ) and H . pacificus ( Ashmead, 1896 ) (= Andricus pacificus ) on Q. vaccinifolia ( McCracken & Egbert 1922 ) , and from galls of Trichoteras coquilletti Ashmead, 1897 on Q. chrysolepis ( Lobato-Vila et al . 2020c ) . Remarks . The type material of Synergus flavens , as well as of its synonym ( S. variegatus ), was examined and the species was redescribed and illustrated by Lobato-Vila et al . (2020c: 16) .