Four species, Heteropoda acuta n. sp., Hippasa partita, Pardosa duplicata n. sp. and P. sumatrana are for the first time known to be the members of the spider fauna of Buxa Tiger Reserve. Hippasa partita is a new record from India. All these four species are reported or described.
The spider Nesticodes rufipes regularly inhabits cockroach traps and feeds on entangled cockroaches. We determined, 1) the potential risks and gains associated with this foraging strategy and 2) whether spiders were evaluating the quality of traps before choosing which ones to inhabit. In terms of risk there was a 16% probability of a spider becoming entangled in a cockroach trap. The potential gains for spiders were in terms of food resources. Spiders that fed in cockroach traps were able to feed on significantly larger German cockroaches (Blattella germanica), than they could capture in naturally constructed webs, adult vs. 4th instars. Spiders also fed on adult American cockroaches (Periplanetaamericana) in traps, which would represent an even larger potential gain in calories. When presented with a choice of traps containing one or five cockroaches, spiders displayed a significant preference for feeding in and inhabiting traps with more cockroaches. Traces of web were found in both traps indicating that the spiders were exploring their environment prior to choosing where to feed, and were actively selecting traps with more prey items. Cockroach traps represent a super food resource for N. rufipes, for several reasons: 1) There is a significant gain in available calories per prey item. 2) There are a large number of prey items available per unit area. 3) Prey items are available for an extended period of time, i.e, cockroaches in a trap remained alive on average almost 14 days after becoming entangled.
台湾から得られたフクログモ属 (フクログモ科) のクモ類の標本を分類学的に研究し, 10種に同定した. そのうちの5種, Clubina yaginumai HAYASHI, 1989 (ヤギヌマフクログモ), C. kurosawai ONO 1986 (クロサワフクログモ), C. deletrix O. PICKARD-CAMBRIDGE, 1885 (マダラフクログモ), C. tanikawai ONO, 1989 (タニカワフクログモ) および C. insulana ONO, 1989 (シマフクログモ) を,台湾の動物相に新たに記録することができた. さらに Clubiona taiwanica C. kuanshanensis, C. bonicula および C. kayashimai の4新種を記載した. 今回の記録を含め現時点での台湾からの既知種すべての学名を掲げた.