Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 63. (Budapest 1971)
Papp, L. J.: The systematic position of Trachylopella kerteszi Duda and some remarks on the Hungarian species of Trachyopella Duda and Elachisoma Rond. (Diptera: Sphaeroceridae)
vein continuing in a well visible width so far that section between its end and termination of r 5 equalling 0.10 mm. Common section of second and third longitudinal veins 0.09 mm., Rs 1 =0,08 mm., Rs 2 = 0.23 mm. Vein r 3 ( = second longitudinal vein) = 0.12 mm. Ms 3 = t a ~t p (DUDA, cf. KIM, 1968!) = 0,08 mm. ACV = t a = = 0,026 mm., PCV = t p = 0.046 mm. Ms well visible for a section (0.17 mm.), same as Ds 5 (a section of 0,08 mm.). Anal vein ( = sixth longitudinal vein), stated by DUDA (1924a) as insignificant, very short. In fact, it is hardly discernible, but immediately perceptible as a venal shadow at an appropriate angle and illumination; its basal section straight, rather long, without continuation. On the other hand, distally from and parallel with it, a second venal shadow is also discernible, and though there appears no connection between them, the distance of the parallel lines is so great that this anal vein can on no account be likened to that present in the Trachyopella species. Alula comparatively long and slightly wider than 0.4 mm., its external margin ciliate. Length of body: 0.85 mm. (corrected owing to downcurving abdomen); 0.78—0.88 mm. in paralectotypes. The data of the type-series, as already cited above, are: Gyón, Com. Pest, leg. KERTÉSZ, 2 October, 1920. Although there are in our collection some other specimens from Gyón identified by DUDA as representatives of the species, they do not belong to the type-series ; on the other hand, all exemplars bearing the above data are to be regarded, based on DUDA (1924a), as members of the type-series. After the designation of the leetotype, they become paralectotypes. Distribution, bionomy. Resides the paralectotypes, there are in the collection specimens from Gyón (1 çf, 3 $), Soroksár (1 9)> Csévharaszt (1 çf), and Aranyosgadány (1 9)- The species was not yet found beyond the borders of Hungary. KERTÉSZ gathered the type-specimens on stable dung (DUDA 1924a), and the exemplar from Aranyosgadány also derives from a dung heap. I caught it on horse droppings at Csévharaszt. The thorough study of Trachyopella kerteszi DUDA and the comparison of the Trachyopella and Elachisoma species have again posed the question of a reconsideration of the caracteristics of the two genera. RONDANI'S (1880) scanty description of the genus Elachisoma was complemented by DUDA (1918) when treating the genus Trachyopella. In a later work, he discussed the differences found in the frontal chaetotaxy (1924b). Since the forms of the anal vein, the face and the frontal tubercle of even the species pilosa, described by him, are not identical with those of Fig. 1. Schematic drawing of abdominal end of the male leetotype of Elachisoma kerteszi (DUDA) — Fig. 2. Wing of Elachisoma kerteszi (DUDA)
