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Volume 39 (1990)
- Issue 2 Pages 45-
- Issue 1 Pages 1-
Volume 39, Issue 1
Displaying 1-5 of 5 articles from this issue
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Ken-ichi KUMADA1990Volume 39Issue 1 Pages 1-5
Published: 1990
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSA new species of the spider family Theridiidae is described from Japan under the name of Argyrodes nipponicus. It is closely related to Argyrodes fur and A. trigonum, but differs from these species in the shape of cephalothorax and the structure of sexual organs. The spiders of the species invade the webs of Agelena limbata and A. opulenta and rarely build their own web.View full abstractDownload PDF (444K) -
Hirotsugu ONO, Yuri M. MARUSIK, Dmitri V. LOGUNOV1990Volume 39Issue 1 Pages 7-19
Published: 1990
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSMaterials of the thomisid spiders collected in Sakhalin and the Kurile Islands are studied. They are classified into 19 species including a new one described under the name of Oxyptila sakhalinensis. Female and male sexual organs of most of the species are illustrated. Zoogeographical notes are given on the basis of the present materials.View full abstractDownload PDF (1343K) -
IV. The Genus Tricca SIMONHozumi TANAKA1990Volume 39Issue 1 Pages 21-26
Published: 1990
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSThis paper is the fourth of the species of “Lycosid spiders of Japan” in which one species Tricca japonica SIMON is redescribed in detail and illustrated, with notes on the biology. Although the name Lycosa ipsa is prior to Tricca japonica, the former is treated as nomen oblitum.View full abstractDownload PDF (601K) -
Makoto YOSHIDA1990Volume 39Issue 1 Pages 27-38
Published: 1990
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSThe predatory behavior of Meta reticuloides YAGINUMA was studied, and the natural prey of the species were collected from its webs. This species employed four predatory sequences, seize-pull out, bite-pull out, bite-wrap and wrap-bite. Wrap-bite sequence, not observed in Metleucauge (YOSHIDA, 1989a), was employed to ants, stink bugs, a large cranefly, bees and wasps, which may be large and/or potentially dangerous prey for M. reticuloides. Attack-wrapping was occurred after prey-touching by legs I (and palps?). The prey, which were entangled with the sticky spirals of the webs, were sometimes carried by pulling from the hub, using legs I and II. “Pulling the prey from the hub” is not observed in Metleucauge (YOSHIDA, 1989a). The ability of attack wrapping of M. reticuloides remains probably because it sometimes captures large and/or potentially dangerous prey.View full abstractDownload PDF (955K) -
Hitoshi MATSUI1990Volume 39Issue 1 Pages 39-44
Published: 1990
Released on J-STAGE: March 29, 2007
JOURNAL FREE ACCESSThe predation effect of Oxyopes badius YAGINUMA upon young larval colony of the pine moth, Dendrolimus spectabilis BUTLER, was investigated. Egg masses which contained different numbers of eggs (20-300) were attached on black pine trees and the emerged immature larvae were exposed to the predation of O. badius. O. badius mainly preyed on the 1st-2nd instar larvae. The larvae in colonies of small size suffered from predation more intensively than those of large one, and this tendency was well expressed by the following equation Y=51.4 log X-63.9 (r=0.814) (Y: survival rate, X: the number of immature larvae at the time of emergence).View full abstractDownload PDF (411K)
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