S. Mahunka szerk.: Folia Entomologica Hungarica 62. (Budapest, 2001)
Fig. 1. Plagiotrochus marianii comb, nova, asexual female: (A) head in dorsal view, (C) head in front view. — Plagiotrochus australis (= cabrerae), asexual female: (B) head in dorsal view, (D) head in front view Kieffer (1902a) described Fioriella marianii on the basis of a female only. Later, in the description of the gall (Kieffer 19026), he mentioned that the larval chambers placed parallel to the branch axis, what is similar to the original description of P. razeti galls (Barbotin 1985). On the figure given by Kieffer (1897-1901) and which was later reproduced by Dalla Torre and Kieffer (1910) only a single chamber is given. It is possible that this species has both, monolocular and multilocular galls, like P. razeti (Barbotin, 1985). The taxonomic position of the sexual generation of Plagiotrochus marianii is uncertain and questionable for us. The types are likely lost. Kieffer (19026) described Callirhytis meunieri on the basis of the gall and a part of the thorax he cutted out from it. Later he transferred this species to Fioriella (Kieffer 1897-1901). The whole description of the adult wasp given by him is that the scutum transversely sculptured like in F. marianii. No doubts, that the gall described by Kieffer (19026) belongs to the sexual generation of Plagiotrochus marianii and structurally similar to the gall of the sexual generation of Plagiotrochus razeti which was experimentally obtained by Barbotin. Kieffer (19026) tried to establish experimentally the alternation of generations in Callirhytis marianii. He observed females of P. marianii on the branches of Q. cerris laying eggs into the buds, however, he thought that the frost killed the buds together with eggs and his experiment failed. Later, in September he found small galls in the buds, although adults already emerged and only from one gall he was able to cut out the thorax of an adult wasp. Thus, Kieffer (19026) correctly described the gall of Fioriella meu-