Abstract
Males ofTelenomus remus Nixon were attracted to the female by a pheromone present for the last 2 days of pupal life and the first few minutes after emergence, but not thereafter. Females in groups lived 6 times longwer than solitary ones; males did not show such a difference. Unmated males lived 8 days, and mated ones 1 day only. The normal sex ratio of 60–70 % females declined to 22 % as the females aged. Under conditions promoting superparasitism, the sex-ratio was close to 50 %. Duration of oviposition was 37 sec. with young females, but increased to over 50 sec. with age. All 3 layers of the host egg mass were parasitized equally. Several females may oviposit simultaneously on the same host batch without showing any aggression. About 60 progeny were produced during the first day of the female's life, but 20 or fewer thereafter.
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