Having continued my investigations on Orange Insects, I have made many other discoveries. Among these probably the most interesting is the breeding of two species of Chalcids from the larvæ of Syrphus flies.

Now, as a general rule, the Chalcididæ must be considered beneficial, the majority of them preying upon other insects injurious to the agriculturist, the species belonging to the Eurytomide genus Isosoma, being, I believe, the only vegetable feeders known among them.