Abai, MR

6th International Congress of DipterologyA revision of the world Japanagromyza species(Agromyzidae)Sasakawa, M.7-6-7 Korigaoka, Hirakata City, Osaka Pref., 573-0084 JapanThe genus Japanagromyza Sasakawa, 1958, was erected for a smallgroup of species, belonging to the genera Agromyza Fallén andMelangromyza Hendel, in Japan. Later, it was found to be well representedin the Oriental-Pacific and Neotropical Regions. It is intermediate betweenthe above-mentioned genera in the chaetotaxy: there are two pairs ofdorso-central bristles as in Melanagromyza and normally a pair of strongprescutellar bristles as in Agromyza. Also, it is provided usually with alateral bristle on fore tibia, although this character is found in someMelanagromyza species, and membranous tubulose distiphallus. A peculiarcharacteristics are the variability in colour of the halteres, development ofthe hypandrial apodeme and paraphallus, and number of the larvalposterior spiracular openings. The halteres are uniformly yellowish whiteor dark brown, or variegated on knobs. The hypandrial apodeme andparaphallus are lacking or variegated in form. The larval posteriorspiracular openings are three or more, or three main branches eachsubdivided into minute openings.This is a predominantly tropical genus and declines northwards in theHolarctic Region. Seventy-one species are now known to occur in theworld, of which 27 species from the Neotropical Region, 17 from theOriental Region, 10 from the Australian Region, remainder 9 in thePalaearctic Region, 4 in Nearctic and Ethiopian Regions, respectively. InJapan, there are eight species, of which four are widespread in the Orientaland Australian Regions.The larval host-plants are only known of 23 species. Of these, 19 areleaf miners, mainly on the Fabaceae, 3 gall inducers and 1 flower-budminer. Pupation takes place in the soil. It is surprising that the maturelarvae of J. quercus, produced further speciation of the Quercus-miners,jump out of the mines to a distance of maximal 61 mm in a horizontalplane.216