1 0 0 0 OA 2020年に長崎県で見つけたクモの覚え書き
The author reports some observational cases herein about spiders found from Nagasaki Prefecture in 2020. A juvenile of a running crab spider Philodromus subaureolus was collected from a leaf of Palmae gen. sp. Its molting was observed 4 days later. An individual of a wandering spider Orthobula crucifera was collected on azalea (Rhododendron sp.). The ant-mimicking spiders, Myrmarachne elongata and Myrmarachne japonica, were collected. A cannibalism of jumping spiders of Salticidae gen. sp. was observed on a flower of azalea. A male individual of Nurscia albofasciata was found on the street. Heteropoda venatoria (an introduced species) was aware in the author’s room of the apartment. An individual of Ebrechtella tricuspidata, one of crab spiders known as a sit-and-wait (ambush) predator, was upon a sunflower Helianthus annuus. An adult female cross spider Argiope amoena captured a large cicada Cryptotympana facialis. It was previously reported that individuals of the prey items foraged by A. amoena are mainly composed of Hymenoptera and Platypleura kaempferi, a small cicada, was the only species of Cicadoidea recorded as the prey of A. amoena. A crab spider Thomisus labefactus was on a leaf of Japanese knotweed Reynoutria japonicaat late September. An adult male trapdoor spider Latouchia typica, one of near threatened species, was found on a wall of the apartment. For near one year, the author had observed wasp spider Argiope bruennichi; an egg sac was discovered in the winter, some stabilimenta of vertical zigzag-lined and disc-shaped were found. Moreover, remarkable decorations such as mass-centered one and zigzag-lined combined with disc-shaped were also found. Molting and sexual cannibalism of them were observed and additionally, an alive individual was found in spite of in late December too.