A parasitic Apocephalus phorid fly attempts to lay her egg (note the long, snaking ovipositor) while her Acromyrmex leafcutter victim struggles to pin the attacker against her defensive spines.

Monte Verde, Minas Gerais, Brazil
Leptopilina boulardi (Figitidae) is a parasitoid wasp that attacks the larvae of drosophilid fruit flies. Here, a female probes a rotting banana with her ovipositor.

Laboratory culture at Emory University, Georgia, USA
Leptopilina boulardi (Figitidae) is a parasitoid wasp that attacks the larvae of drosophilid fruit flies. Here, a female probes a rotting banana with her ovipositor.

Laboratory culture at Emory University, Georgia, USA
Trichopria drosophilae (Diapriidae) is a parasitoid wasp that attacks the pupae of drosophilid fruit flies. Here, a female probes a pupa with her ovipositor.

Laboratory culture at Emory University, Georgia, USA
A wasp egg (Pison sp., Crabronidae) on a paralyzed spider.

Yandoit, Victoria, Australia
Lytopylus (Braconidae: Agathidinae) wasp ovipositing into a sunflower. These insects are parasites of seed-feeding moths.

Lake Forest, Illinois, USA
A cynipid gall wasp takes advantage of a previous wasp's efforts and lays her egg inside an existing oak gall.

Bell Smith Springs, Illinois, USA
Leucospis is a parasite of wood-nesting bees and wasps. Here, a female lays her egg in an unguarded nest.

Urbana, Illinois, USA
An Ant-Decapitating Fly (Phoridae, Pseudacteon sp.) attempts to separate a fire ant (Solenopsis macdonaghi) from her nestmates. Lone ants make easier targets.  

Parque Nacional El Palmar, Entre Rios, Argentina
A parasitic Apocephalus phorid fly attempts to lay her egg (note the long, snaking ovipositor) while her Acromyrmex leafcutter victim struggles to pin the attacker against her defensive spines.

Monte Verde, Minas Gerais, Brazil
A parasitic Apocephalus phorid fly attempts to lay her egg (note the long, snaking ovipositor) while her Acromyrmex leafcutter victim struggles to pin the attacker against her defensive spines.

Monte Verde, Minas Gerais, Brazil
A parasitic Apocephalus phorid fly attempts to lay her egg (note the long, snaking ovipositor) while her Acromyrmex leafcutter victim struggles to pin the attacker against her defensive spines.

Monte Verde, Minas Gerais, Brazil
See photo in original gallery.
all images and text © Alex Wild 2001-2013