Seasonal life cycle of Zatypota albicoxa (Hymenoptera: Ichneumonidae), an ectoparasitoid of Achaearanea tepidariorum (Araneae: Theridiidae), in northern Japan

The seasonal life cycle of Zatypota albicoxa (Walker, 1874), a koinobiont ectoparasitoid of the house spider, Achaearanea tepidariorum, was examined at Hirosaki (40°36′N), Japan. In winter, larvae were found on the abdomen of host spiders. They grew rapidly, emerged as adults in mid‐May, and reproduced shortly after emergence. The seasonal occurrence of the developmental stages in the field indicated that this parasitoid is multivoltine in Aomori Prefecture.