THE EFFECTS OF INJECTION OF AMPHETAMINE ON FEMALE INSEMINATION IN THEBLACK BLOW FLY, PHORMIA-REGINA (DIPTERA, CALLIPHORIDAE)

An earlier study on the blowfly Phormia regina (Meigen) demonstrated t hat the injection of amphetamine (12 mu g) depletes biogenic amine lev els in the CNS. In the present study, P. regina females were injected with amphetamine (12 CIS), each female was placed with three males and insemination success was determined. Amphetamine inhibited female ins emination by 43.3% at 2-90 min post-injection and by 70% at 10-60 min post-injection, At 180-270 min post-injection, there was no significan t inhibition of female insemination. This study indicates a possible r ole in insects for the biogenic amines in female insemination.