S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)

MATERIALS AND METHODS We examined the type material of Fioriella marianii (Kieffer, 1902) (asexual generation) and Plagiotrochus australis (Mayr, 1882) (sexual generation). Material on P. australis from the Iberian Peninsula and France was examined also, both the asexual and sexual generations, including three asexual females which were obtained by Barbotin in his experiment. Finally, the types of Plagiotrochus razeti Barbotin, 1985, and the specimens collected in Spain, Andorra and France were studied also, including Barbotin's experimental material. The SEM pictures were taken by the second author without coating and with low voltage to preserve specimens. We follow the current terminology of morphological structures as given in Gibson (1985), Ronquist & Nordlander (1989) and Fergusson (1995). Abbreviations for fore wing venation follow Ronquist & Nordlander (1989). The measurements and abbreviations used herein include: F1-F12, 1st and subsequent flagellomeres; POD (post-ocellar distance), the distance between the inner margins of the posterior ocelli; OOD (ocellarocular distance), the distance from the outer edge of a posterior ocellus to the inner margin of the compound eye; LOL, the distance between lateral and frontal ocellus. The width of the radial cell is measured along 2r. RESULTS The type material of Fioriella deposited at the Naturhistorisches Museum, Vienna, Austria (NHMW) represented by eight asexual females, mounted on three pins. This material, no doubts, belongs to the original Mayr's collection, each pin labelled as "Collect. G. Mayr" and "Fior. marianii Kieffer. det G. Mayr". The 1st pin with four females has an additional handwriting white label "marianii''; the 2nd pin has an inscription which, probably, we can read as "Pontia ... marianii Fiori". After consulting Kieffer's typography in Horn et al. (1990) we can appoint this label to Kieffer. Finally, the 3rd pin has no label written by Kieffer. Nieves-Aldrey designated the lectotype and added two labels: a red one "Paralectotipo or lectotipo" and a white one "Cynipidae, Plagiotrochus australis Mayr, agamic generation, J. L. Nieves det. 96". Barbotin (1972) established that Plagiotrochus australis (Mayr, 1882) is the sexual generation of the asexual Dryocosmus cabrerae Kieffer, 1901. He did not mention in his paper whether he studied the type material of D. cabrerae, which presumably is lost now. However, Barbotin deposited in the NHMW (Box 2, 35) three asexual females obtained by him experimentally and which were labelled as "Plagiotrochus cabrerae K. (= Dryocosmus c), forme agamique de Pl. australis Mayr". Eight wasps of P. australis are deposited in the NHMW which belong to the original Mayr's series. The material labelled as "Collect. G. Mayr", "Dryoc. australis det. G. Mayr", six pins have also a red label "TYPE" which was put onto pins later and are not Mayr's original labels. However, the red label "TYPE" do not designate the lectotype. Lectotype female labelled "Collect. G. Mayr", "Dryoc. australis det. G. Mayr", red label "TYPE" (wasp in a good condition, except for the lack of the left antenna) is herein designated. All diagnostic characters known for Plagiotrochus genus are present in Fioriella as