Abstract
Males of the aphid parasite Aphidius smithi Sharma & Subba Rao normally emerge from the pupal cocoon several hours earlier than females (Wiackowski 1962). There is no clear evidence to suggest whether this difference is caused by a sexual dimorphism or, for example, by a propensity of the parasite to lay first unfertilized (male) and then fertilized (female) eggs. An experiment was designed to test whether male larvae of A. smithi require less time than female larvae to complete development, and whether gene Orange (O), which controls abdominal pigmentation, has any measurable effect on larval development (Mackauer 1968)2.
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