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 mating flight of Crematogaster cerasi acrobat ants provides a parasitic Pseudacteon fly (at lower right) an opportunity to attack.

Urbana, Illinois, USA
A mating flight of Crematogaster cerasi acrobat ants provides a parasitic Pseudacteon fly (at lower right) an opportunity to attack.

Urbana, Illinois, USA
A trio of parasitic phorid flies (Pseudacteon lontrae) hover over an ant nest (Linepithema oblongum) looking for targets.

Termas de Reyes, Jujuy, Argentina
Wham!  A parasitic phorid fly (Pseudacteon) plants her ovipositor between the abdominal sclerites of a Linepithema oblongum worker ant to lay her egg.  The oviposition takes less than a second. The hapless ant will later be consumed alive by the developing fly larva.

Termas de Reyes, Jujuy, Argentina
Wham!  A parasitic phorid fly (Pseudacteon) plants her ovipositor between the abdominal sclerites of a Linepithema oblongum worker ant to lay her egg.  The oviposition takes less than a second. The hapless ant will later be consumed alive by the developing fly larva.

Termas de Reyes, Jujuy, Argentina
Wham! A parasitic phorid fly (Pseudacteon) plants her ovipositor between the abdominal sclerites of a Linepithema oblongum worker ant to lay her egg. The oviposition takes less than a second. The hapless ant will later be consumed alive by the developing fly larva.

Termas de Reyes, Jujuy, Argentina
Wham!  A parasitic phorid fly (Pseudacteon) plants her ovipositor between the abdominal sclerites of a Linepithema oblongum worker ant to lay her egg.  The oviposition takes less than a second. The hapless ant will later be consumed alive by the developing fly larva.

Termas de Reyes, Jujuy, Argentina
Wham! A parasitic phorid fly (Pseudacteon) plants her ovipositor between the abdominal sclerites of a Linepithema oblongum worker ant to lay her egg. The oviposition takes less than a second. The hapless ant will later be consumed alive by the developing fly larva.

Termas de Reyes, Jujuy, Argentina
See photo in original gallery.
all images and text © Alex Wild 2001-2013