Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 60. (Budapest 1968)

Farkas, H.: On the eriophyoids of Hungary. VI. The description of three new species

Remarks : The shape of Vasates dictamni resembles that of the members of the genus Aceria, though it has a frontal lobe and the number of tergites exceeds that of the ventrites. Phyllocoptes polygalae sp. n. Female 220 y. long, its greatest width 80 u, in a superior view. Robust, fusiform, circular in cross-section. Colour yellowish brown. Rostrum 24 y. long, deelinate, rather small as related to size of body. Shield semicircular, together with frontal lobe 60 u. long. Pattern negligible or absent. Frontal lobe semicircular in a superior view, 12 u, long, at base 24 u, long. In a lateral view thick, inferiorly verrucose. Setae of shield 7 u, long, thin and short, directed centrad. Fore leg 38 |x long, tibia 10 [X long, its seta in upper third. Tarsus 7 [x long, femoral seta absent, claw short, straight or hardly arcuate, knobbed, 5 u, long. Featherclaw short, 4-rayed, 5 p. long. Lateral bristle 12 fx long, first ventral seta 40 u. long, second ventral seta 18 u, long, third ventral seta 30 u. long, situated on last sixth ring. Caudal bristle thin. Number of tergites 43, that of ventrites greater. Tergites smooth, ventrites with minute microtuberculi. Last 6—7 rings with elongated microtuberculi on ventral side. Epigynium 24 fx wide, coverflap peculiar, apron-shaped, with extremely fine sculpture but without usual ribbing. Genital seta 14 [x long, spaced 17 u, from one another. Type-locality: Lena, Germany. Collected on 21 September, 1961, by H. Burnt. Host: Poly gala vulgaris L. (Polygalaceae)

. Relation to hosts: H. BUHR found the deformation similar to that of Aceria brevirostris. Remarks : When describing the species Epitrimerus rumicis, I have noticed the extraordinary similarity to each other of a number of Epitrimerus taxa. Their common features are the rather big size, the smooth dorsal shield, the absent or negligible pattern, the minute seta of the shield, the small featherclaw, the absence of the femoral bristle, the laterally thick and inferiorly verrucose frontal lobe, and, most interesting of all, the peculiar and apron-shaped coverflap — ribbed instead of finely striated — of the epigynium. The species can practically not be distinguished from one another, at least not morphologically. All differences observed derive from individual variations and errors resulting from faulty measurement methods. Two possibilities can be suggested. 1. There is a single, polyphagous species occuring on various host species ; 2. There are oecologically distinct but morphologically identical species living on different kinds of plants. In my opinion, the latter possibility is the more probable. Reference: FARKAS, H. K.: Über die Eriophyiden (Acarina) Ungarns. I. Beschreibung neuer und wenig bekannter Arten (Acta Zool. Hung., 6, 1960, p. 315 — 339). 16 TT. Múzeum Évkönyve 1968