Boletín de la AeE

There are many studies regarding to the fauna associated with the gall-former Cynipidae. In fact, the bibliographic references before 1968, in Europe, are published in the work of FULMEK (1968). In relation to the agamic form of Andricus kollari the most impoitant is the stndy of ASKEW (1961).

Andricus kollari is a common gall-former cynipid in deciduous Quercus. It has s a generational alternancy proved by BEIJERINK (1902). The sexual form is only known on Q.cerris (FOLLIOT, 1964). The deciduous oak that substirutes Q.cerris in the Iberian Península is still unknown; Q.cerris is not present in the área. Nevertheless, some sexual females not belonging to Andricus kollari (=circu¡am, Mayr, 1870) have been collected, from which the agamic form galls on Q.pubescens have been found (PUJADE, 1992).

The gall studied is lignicolous, has a diameter of 2-3 cm unless invaded by any hosts. In this case it can be smaller or unrecognizable (PUJADE, 1991). The gall surface is aparently smooth, although it has very small scales on its epidermis. The coloration is green in the fírst weeks, but it turns to brown when the gall is mature. In the upper part there are sometimes a crown of small protuberances. In a transverse cut there is an only larval cell, situated in the middle, with thick whitish walls, recovered by a spongy, shiny and radial tissue.

A total number of 426 galls have been studied, all of them collected in the Iberian North-East. 859 inquilines and parasites belonging to 27 species have been obtained. In this work all of them and their inter-relations are mentioned (if they have been recognized). As inquiline genera there are Synergus Hartig, Saphonecms Dalla Torre & Kieffer and Ceroptres Hartig; Synergus umbraculus (Olivier) is the most abundant species. Eurytoma brunivenfris Ratzeburg is the most common parasite wasps species with a 5.4%. The parasites obtained (a 17.9% of the total fauna associated) belong to: Eitrylorna Illiger and Eudecaíoma Ashmead (Eurytomidae), Ormyms Westwood (Ormyridae), Eupelmus Dalman (Eupelmidae), Megastigimis Dalman and Torymus Dalman (Torymidae), Mesopolobus Westwood, Cecidosliba Thomson and Hobbya Delucchi (Pteromalidae).