All stages or aphids and many forms of soft bodied insects can be successfully preserved whole in nlicroscopical mounts provided the specimens are prepared according to methods based on suitable technique. Leading works on the subject, notably those by Kingsbury and Johannsen (4), Eltringham (1). Lee (5), and Kennedy (3), deal essentially with principles, formulae, and processes applied mostly to histological studies with some reference to entomological technique.