All the different kinds of cicada are now in full song, and, as I sit on my porch looking into my sunlit garden, I can detect the calls of at least four of these. Most noticeable, perhaps, is the pulsating song of the big black cicada, the strident beats of which fill the air for periods of half a minute to a minute at a time, cease for a while, and then start again, Incidentally, it may here be recorded that T first heard this species this year on July 6, which was the first hot day this month. It was in a friend's garden. I did not hear it in my own garden till late in the afternoon of July S. In view of the fact that some of these insects had already emerged from the ground two or three days prior to the date on which they were first heard, I am inclined to the opinion that it is not the advent of the frst hot day in July that makes the big black cicada emerge from the ground, since he has already done so, but that it requires a really hot day to make him start singing. Apparently what happens is that the nymphs of this cicada begin coming out of the ground and passing through their wonderful transformation into the imagoes or perfect insects towards the very end of June or early in July, but they do
Text read from the printed page and cleaned; old type leaves the occasional error.