O. Merkl szerk.: Folia Entomologica Hungarica 68. (Budapest, 2007)

pallidipennis (MOTSCHULSKY, 1874) in Amorpha fruticosa (WENDT 1981, SZENTESI 1999). In 2001 a third species was reared from the pods of Gleditsia triacanthos that were collected in a city park of Budapest. The specimens were identified by KLAUS-WERNER ANTON as Megabruchidius tonkineus (JERMY et al. 2002, JERMY & SZENTESI 2002). ANTON moved a third species, Bruchus tsinensis PIC, 1923, closely related to Megabruchidius dorsalis, into Megabruchidius (JE RM Y et al 2002). The fourth known species of the genus, Megabruchidius sophorae was described from Japan as new, named after its host plant Styphnolobium japonicum (= Soph or a japonic a L.) (TUDA & MORIMOTO 2004). This tree species is one of the most common woody ornamental planted in some Hungarian cities, however, Megabruchidius sophorae has not been recorded from it so far. Abbreviations of collectors' names - AB = ATTILA BARTHA, AG - ARANKA GRABANT, AK = ATTILA KOTÁN, AP = ATTILA PODLUSSÁNY, DP = DÁNIEL PIFKÓ, JT = JÚLIA TAMÁS, KV = KÁROLY VÍG, LH = LÁSZLÓ HORVÁTH, OM = OTTÓ MERKL, PCS = PÉTER CSONTOS, PSZT= PETRA SZÖLLÖSI-TÓTH, TN = TAMÁS NÉMETH, ZGY = ZOLTÁN GYÖRGY. NOTES ON MORPHOLOGY Adult - BOROWIEC (1984) gives a detailed description of Megabruchidius tonkineus adults, which is supplemented hereby only with a few data and figures. The first abdominal ventrite of the males has a depression covered by large, light-coloured setae, which can also be observed on the New World species Acanthoscelidespallidipennis (MOTSCHULSKY, 1874). The function of this structure is so far unknown, perhaps associated with pheromone glands. The scutellum has two laterally directed triangular projections (Fig. 1), which resemble those of Bruchus LlNNAEUS, 1767 (see fig. 22 in BOROWIEC 1988), the prosternai process is shown on Fig. 2, for the prosterna of other genera see BOROWIEC (1988: figs 14-15). Because of the great variability of seed beetles, examination of genitalia is often unavoidable and thus practised for a long time, especially for males. As opposed to the aedeagi of the males, the female genitalia are poor in characters, therefore reliable identification of females is a problem even today. In the species of Bruchus the female genitalia are tiny and simple, not allowing distinction between species, while in Bruchidius (MÉRGEN, 1999) and Spermophagus SCHÖNHERR, 1833 (BOROWIEC 1991) more sclerotized and complicated structures are present. The morphology of the female genitalia of seed beetles was studied in detail by MERGEN (1999). Since the female genitalia (Fig. 3) and the spermatheca (Fig. 4) of Megabruchidius was not published before, a figure of Megabruchidius tonkineus is included. Wing venation of the seed beetles is perhaps unsuitable for distinguishing species, but it is much more important as a generic character, therefore the wing is shown on Fig. 13. Egg - The egg (Figs 5-7) is yellow, elongate ovoid, with one end pointed the other rounded. Length 0.720-0.900 mm (n = 10, average 0.831), maximum width 0.280-0.400 mm (n = 10, average 0.317). The egg shell is finely punctate.