Among the ways I find that one can study the changes in the insect fauna of a iocality as years go on is to occasionally go back to some such section where one has years ago been familiar with the insects to be found there and note the number of new comers or, possibly, the passing of some of the old ones, though these last are by far the less numerous of the two.

Recently, while on a visit to my old home in De Kalb county, Northern Illinois, the insects of which I was pretty well acquainted with twenty years ago, but with which I have known little since that time, I was most unexpectedly met with complaints of the Buffalo carpet beetle, Anthrenus scrophulariæ, unheard of there until within a few years, and which I never captured there myself.