Boros István (szerk.): A Magyar Természettudományi Múzeum évkönyve 51. (Budapest 1959)

Szabó J., B.: Notes on the new tribus Amitini with the descriptions of a new genus and some new species of the Arctogaea (Hymenoptera, Proctotrupoidea, Platygasteridae)

Notes on the New Tribus Amitini with the Descriptions of a New Genus and Some New Species of the Arctogaea (Hymenoptera, Proctotrupoidea, Platygasteridae) By J. B. SZABÓ, Budapest The genus Amitus was described by Haldeman in 1850 (generotype : Amitus aleurodinis Hald. 1850), based on both sexes, bred from Aleurodinid (Rhynchota) species. M u e s ebeck, Krombein and T o w n e s (1951) listed, in their work „Hymenoptera of America North of Mexico", the following Aleurodid species as hosts of Amitus aleurodinis : Aleurodes corni Hal. ; Trialeurodes fernaldi (Morril) ; Aleuroplatus plumosus (Quaint.) ; Aleurochiton forbesii (Ashm.). In 1878, A. Foerster described the genus Zacrita (generotype: Zacrita longicornis Foerster 1878) from Europe, based only on the female ; it was synonyinised with Amitus Hald. 1850 by J. J. Kieffer in his monograph (Das Tierreich, Sceiionidae). Some years later, in 1884, S. Forbes published the description of the genus Elaptus (generotype : Elaptus aleurodis), based on female specimens. According to Muesebeck & others, this again is synonymous, together with Anaphes mellicornis Ashmead 1887, with the common American species Amitus aleurodinis Hald. 1850. In 1911, Silvestri described the second species Amitus minervae Silv. 1911 of the Palearctic region. This was recorded from Aleurodes olivinus Silvestri. The occurrence of this species in the territory of Hungary is not established as yet, but L. M a s n e r recoredd this species from Czechoslowakia, and therefore we must take this species into consideration. In the present paper, I describe the yet unknown male of Amitus longicornis Foerster 1878, giving notes on the biology of this species, bred from Aleurochiton aceris, collected by Prof, dr. G. Szelényi. Based on specimens in my own collection and in the large material of Prof. Dr. J. Balogh, taken during the investigation of the hungarian terricolous fauna by the means of the Moczarsky & Winkler desiccating apparatus in the later decades, I redescribe the doubtful genus Isolia Foerster 1878, regarded by some authors as a genus dubium. A. Foerster described this genus very sparingly and without any generotype. J. J. Kieffer quoted A. F o e r s t e r's generic diagnose in his monograph as follows : „Von Isolia unterscheidet sich Zacrita leicht, denn bei Isolia nimmt das 2. Segment fast den ganzen Hinterleib ein und die Fühlerkeule ist dreigliedrig.". Having examined the genera Amitus Hald. 1850 and Isolia Foerster 1878, I am convinced that both genera form a special group, disposing of many peculiar morphological characteristics. For this reason, I subdivide the family Platygasteridae into the following tribes : 1. Iphitrachelini Masner 1957 (tarsi of hind legs 4-jointed, in contrast with the following tribes, which have the tarsi of the hind legs always 5jointed) ;