A descriptive note on the early post-larval stages of the xanthid crab Parapilummis trispinosus SAKAI, is given in this report. Megalopas collected at Uranouchi Inlet, Tosa Bay, Japan, were reared in the laboratory up to the third crab stage. Molting from first to third crab required ca. 35 days at laboratory conditions of 28.5-29.7℃ and 33.0-33.4 ppt salinity. Morphology and setation of all the megalopal appendages and characters of early crab stages are described. A comparison with recent accounts given on larval characters and a brief discussion on early crab stages of xanthoids are also given.
As people believe that two palinurid lobsters of Justitia japonica and Palinustus waguensis are seldom met with, the authors compiled available informations scattered among a variety of pamphlets and so on published in Japan, and then represented the data for these species captured with lobster's trap-nets off Wagu, Mie Prefecture, central Japan. Based on these data, more than tens of the J. japonica specimens and several ones of P. waguensis have been trapped every year. These palinurid species are not so rare in Japan and probably in other regions of the world.
Two new species of oribatid mites are described from China : Scheloribates oryzae, an important pest of the rice plant, and Dometorina praedatoria, a useful mite feeding on gall mites of orange tree.
Two new clubionid spiders of Japan, Clubiona chikunii and C. sapporensis, are described. They are closely related to C. akagiensis HAYASHI and C. lena BOESENBERG et STRAND, respectively but are distinguished from them by the structure of the female epigynum and male palp.
Three cordulegasterid dragonfly species were recorded from Thailand. Anotogaster gregoryi gregoryi FRASER has been known from Yunnan. The South Thai insect, Chlorogomphus arooni ASAHINA was also taken from Ranong Province, but one unidentifiable larval exuvia belonging to the same genus was taken at Doi Suthep and briefly described.
Redescriptions of the monobasic genus Aspidobactrus and its species, claviger SHARP are given, together with illustrations of the whole body and taxonomically important characters. This genus is newly transferred from the tribe Pygostenini to the tribe Oxypodini of the subfamily Aleocharinae.
The costal chaetotaxy of the genus Drosophilella DUDA is taximetrically analysed in relation to other diagnostic characters and the host plants. A new species, D. zeylanica, is described from Sri Lanka. This species is found to have the chaetotaxy common among the family Drosophilidae but unique in the genus.
A new species of Neoferdina is described under the name of Neoferdina japonica from Kushimoto, Wakayama Pref., Japan. This species is related to N. ocellata (H. L. CLARK) and N. insolita LIVINGSTONE. However, it is separable from the former by the shape and arrangement of superomarginal plates and from the latter by the shape and granulation of the first superomarginal plate.