An alternative host searching strategy found in the subfamily Hybrizontinae (Hymenoptera, Ichneumonidae)

The present study reports the oviposition behavior of ant parasitoid wasp, Ghilaromma orientalis , on an undescribed species from Lasius fuliginosus group in Japan, illustrated by clear photographs. Previously, subfamily Hybrizontinae had been limited to hovering trail and attacking larvae carried worker ants. In contrast, G. whose not reported date, wasp hung grass growing along ants’ its hind legs with head down, when workers pass by, directed abdomen toward remaining grass. Our findings suggest that employs two host-searching strategies—an active strategy previously known ambush-type employed . affords advantage laying eggs a narrow environment where wasps cannot fly without being noticed Moreover, avoiding detection through ambush tactics, are increasing their chance for attack, as ants continue transport larvae. However, search range is reduced, which may limit opportunities parasitization. Additionally, while nipponensis has observed sole host now L. group, suggesting have subgenus-specific range.