Change in behaviour of the cockroach, Periplaneta americana, after being stung by the sphecid wasp Ampulex compressa

The solitary wasp Ampulex compressa Fabr. (Sphecidae: Hymenoptera) stings the cockroach first in the thorax and then in the neck toward the suboesophageal ganglion. The first sting results in a short lasting and completely reversible paralysis. The second sting causes an irreversible change in the behaviour: undisturbed cockroaches seem to be lethargic, and if stimulated they are able to run with speeds that equal that of control animals.