Why is mama not adipose ?

Iriomotejima. This species is usually rare and collected in riversides of southern Japan. D. lacteicornis and D. formosana were collected only in wild forests of Ishigakigjima and Iriomotejima although they were not dominant in the islands. The collection of D. bocki in Ishigakijima, Iriomotejima, Haterumajima and Y onagunijima is a new record of the distribution in Japan. D. bocki is a closely related species to D. kikkawai which is a domestic and world wide species. The first collection of Japanese D. bocki was in Iriomotejima in 1979 by the one of the authors (M.W.). Since morphological classification of the species was actually diffcult at that time, it was identified as D. bocki by mating experiments, two-dimensional electrophoresis and allozye electrophoresis (Ohnishi et al., 1983). The present study shows that D. bocki dwells in the four Sakishima islands and prefers the wild environment rather than human habitation. D. bocki may not be a recent colonizer in Japan. A diffcult identification might have missed the species as in the case in Taiwan (Baimai, 1979; Baimai et al., 1980).