Two new herb gall wasps from Spain, including the description of a new species of Aulacidea Ashmead, 1897 (Hymenoptera, Cynipidae, “Aylacini”) inducing galls on Serratula nudicaulis L. DC (Asteraceae)

Two new species of herb gall wasps are recorded from Spain, which induce galls on flower heads of Serratula nudicaulis L. DC (Asteraceae). Isocolus serratulae (Mayr, 1882) is recorded for the first time in Spain, while a new species of Aulacidea Ashmead, 1897, Aulacidea pilarae sp. n., is described. This new species is similar to Aulacidea serratulae Diakontschuk, 1984, which is found throughout Oriental Europe. However, those two congeneric species may be distinguished by the morphology of the adults. Se citan dos nuevas especies de avispas de las agallas en plantas herbáceas para Espa a. Las dos especies inducen agallas en cabezuelas florales de Serratula nudicaulis L. DC (Asteraceae) y se han encontrado en el valle del Lozoya (Madrid, Espa a Central). Isocolus serratulae (Mayr, 1882) se cita por primera vez para la Península Ibérica y se describe una especie nueva de Aulacidea Ashmead, 1897: A. pilarae sp. n. La nueva especie es similar a Aulacidea serratulae Diakontschuk, 1984 citada de Europa oriental, diferenciándose por la morfología de los adultos.