Kokkocynips difficilis (Ashmead, 1887) n. comb.
Andricus difficilis Ashmead, 1887. in: Tr. Amer. Ent. Soc, V. 14 p.143.
Callirhytis difficilis (Ashm.): Mayr, 1902. Verh. Ges. Wien, v. 52, 289.
Gall: small (12 X 15 mm), irregularly rounded, densely rugose, reddish when young and turns grayish following gall maturation, slightly flattened at sides, the rugosities arranged transversally in five to six rows. These galls occur in clusters, emerging in rows from fissures or slits in the terminal twigs; when mature fall to the ground (Ashmead 1887).
Host plant: Quercus laurifolia, Q. cinerea [incana], Q. catesbaei [laevis], Q.nigra, Q. myrtifolia and Q. phellos (Weld 1959)
Biology: only known from the asexual generation. According to Ashmead (1887), the adults emerge from galls from August to September; Weld (1959) noted that adults also emerged later in the year up to December.
Distribution: South-eastern North America, from Maryland southwards to Florida and westwards to Texas (Burks 1979, pers. obs.).
