Drinking by Certonotus fractinervis (Hymenoptera: Ichnuemonidae) at a fungal fruiting body
An adult male Certonotus fractinervis (Vollenhoven, 1873) was observed drinking from a droplet on the surface of a stroma fruiting body of the fungus Cyttaria nigra Rawlings, 1956 (Figure 1). The site was near Black Gully in the Blue Mountains, Southland (45.902 °S, 169.370 °E), at 800m altitude in a bushline stand of silver beech (Lophozonia menziesii) where galls caused by the fungus were common and in all stages of fruiting. It was about 13:30 NZST on 11 January 2017, with calm, cool, overcast conditions without rain. The position as in the photograph lasted 2 to 3 minutes during a period of 10 minutes when the wasp was seen flying and walking within an area of approximately 2 m3 in the sub-canopy (about 4 m above ground). The wasp was actively waving its antennae in an apparent search, with attention paid to immature stroma and the occasional droplets seen on them. It did not alight on any other part of the tree.