S. Mahunka szerk.: Folia Entomologica Hungarica 34/2. (Budapest, 1981)
FOLIA ENTOMOLOGICA HUNGARICA ROVARTANI KÖZLEMÉNYEK XLII (XXXIV) 2 1981 p. 253-258 Notes on the subgenus Miraradus of the genus Aradus (Heteroptera: Aradidae) By T. VÁSÁRHELYI (Received July 25, 1981) Abstract. - The fourth instar larva of Aradus (Miraradus) foliaceus Kormllev, 1957, and the male of A. (M.) mirabilis Bergroth, 1892 are described. Notes on the larval development of foliaceus and a cladogram for the four species of the subgenus are given. Having completed the manuscript of an earlier paper (VÁSÁRHELYI, 1980) describing the subgenus Aradus (Miraradus) two specimens belonging to this subgenus came to light. One is a further larva of Aradus (Miraradus) foliaceus Kormilev, 1957, while the other the so far unknown male of A. (M.) mirabilis Bergroth. 1892. Since we have males of all the four species belonging to this subgenus, a comparative evaluation of some characters is possible. On the larval development of Aradus (Miraradus) foliaceus The species is apparently not as rare as its relatives. A fourth instar larva which is most likely belonging to foliaceus is at hand and together with the known fifth instar (VÁSÁRHELYI, 1980) and the imago a picture of a possible larval development characteristic to some other species of the genus may be constructed. Description of the fourth instar larva (Figs. 1-3). General appearance (Fig. 1) similar to the fifth instar. Head similar, antenniferous and postocular tubercles shorter, latter spiniform. Antenna (Fig. 3) thicker, joint RI depressed, with a very shallow furrow, apical 4/5 yellow. Relative length of antennái joints I to IV as: 13:25:28:23. Labial atrium widely open, rostrum almost reaching hind border of prosternum. Relative length of rostral joints I+n-IV as: 19:15:13. Pronotum 5.5 times as wide as long, less developed than on fifth instar, anterolateral margin not widely rounded and with fewer teeth. Mesonotum with wing pads, metanotum with slightly developed wing pads, lateral margin with 2 teeth. Legs relatively thick, each femur fused with trochanter. Abdominal tergite I not covered, laterally without dentate margin, with 2 glabrous areas on both sides. Tergites II-VII with a 2:2:1 pattern of dorsal glabrous areas. Tergites ni-VI medially fused, all three small scent gland openings visible. Connexival plates RI-VIII with 3 larger teeth. Abdominal sternites II-Vin with a 1:2:1 pattern of glabrous areas, lateral ones longer, oval. On sternites median opaque area present, Sternite IX bearing a small tubercle to be developed into pygophore . Measurements (Ä) : median length of body 5.4 mm, length of antenna 2.3 mm, length of head 1 mm, width of head 1.1 mm, length of pronotum 0.5 mm, width of pronotum 2.7 mm, length of mesonotum 0.5 mm, width of mesonotum 2.9 mm, maximum width of abdomen across segment ni 3.1 mm. Material examined; Vietnam, 4.59. Felix leg. Deposited in the Hungarian Natural History. Museum, Budapest. Additions to the knowledge of the fifth instar larva (Figs. 4-5). The short description (VÁSÁRHELYI, 1980) should be completed with the following: relative length of antenna! joints I
