A new species of genus Eriborus Förster (Hymenoptera: Ichneumonidae) parasitizing Holcocerus insularis Staudinger (Lepidoptera: Cossidae)

Abstract

A new important parasitoid of Holcocerus insularis Staudinger, viz. Eriborus applicitus sp. n., collected from Shenyang, China, is described. The adults of E. applicitus emerge during the daytime, mostly at 8-11 AM, and start calling and mating one hour after the emergence. The ratio of males: females is approx. 2:3. Within 3-4 hours after their emergence, the newly-emerged virgin females strongly attract males; they are still attracting males at day 2, although their calling behavior seems much less intensive than at day 1. No calling or mating behavior occurs during night time. Females can mate at least twice before laying eggs, while males can only mate once. Mated females search their hosts by walking on the bark surface of H. insularis-infested Malus baccata (L.) Borkh. trees for oviposition. © Entomologica Fennica.