Abstract
I had a chance to examine polycentropodid caddisfly larvae collected in a cave in Fukui, central Honshu, Japan in 2009. These larvae are unusual in that their heads and pronota are entirely yellow without pigmented muscle scars and their eyes are very small. Surveys from late autumn in 2009 to 2011 in the cave have yielded additional larvae and several adult females. The adult has the usual features of large compound eyes and forewings with white spots on the black ground color. The wing venation is similar to that of Plectrocnemia. The habitat in the cave is described, with particular reference to the evidence of an obligate, troglobite cave-dwelling caddisfly. The larva and adult female are described and illustrated.
References
Edington, J.M. & Hildrew, A.G. (1995) A revised key to the caseless caddis larvae of the British Isles with notes on their ecology. Freshwater Biological Association Scientific Publication, 53, 134.
Momosaki, T. (2009) Artificial caves in Fukui Prefecture and inhabiting species（bats and trechid beetles). Bulletin of the Fukui City Museum of Natural History, 56, 21–30. [in Japanese]
Nimmo, A.P. (1996) Bibliographia Trichopterum: a World bibliography of Trichoptera. Vol. 1. 1961–1970. Pensoft Publishing, Sofia, 111 pp.
Oláh, J. & Johanson, K. (2010) Generic review of Polycentropodidae with description of 32 new species and 19 new species records from the Oriental, Australian and Afrotropical Biogeographical Regions. Zootaxa, 2435, 1–63.
Reeves, W.K. & Paysen, E.S. (1999) Black flies (Diptera: Simuliidae) and a new species of caddisfly (Trichoptera: Hydropsychidae) in a northwestern Georgia cave stream. Entomological News, 110 (5), 253–259.
Salavert, V., Zamora-Muñoz, M., Ruiz-Rodríguez, Fernández-Cortés, A. & Soler, J.J. (2008) Climatic conditions, diapause and migration in a troglophile caddisfly. Freshwater Biology, 53, 1606–1617.
Sato, M. (1964) Insects found in Tokuwase-do Cave, Is. Toku-no-shima. New Entomologist, 13 (8), 69–73. [in Japanese with English abstract]
Schmid, F. (1998) Genera of the Trichoptera of Canada and adjoining or adjacent United States. The insects and arachnids of Canada, Part 7. NRC Research Press, Ottawa, 319 pp.
Wiggins, G.B. (1996) Larvae of the North American Caddisfly Genera (Trichoptera). Second Edition. University of Toronto Press, Toronto, 457 pp.
Yoshizawa, Y. (2008) The Shakudani Ishi and collapse of old mining gallery in the Asuwayama, Fukui City. Bulletin of the Fukui City Museum of Natural History, 55, 3346. [in Japanese]