These two families immediately follow the Coccinellidæ in our lists, and are evidently related to them in many respects, the former, perhaps, the more closely, especially in tarsal strucutre. In habits there are, however, wide differences, the Coccinellidæ, as a already stated in a former paper, being chiefly aphidivorous, while the Endomychidæ and Erotylidæ are mostly fungivorous.