On 19th October, 1884, I took from a decaying hickory stump a specimen of Alaus oculatus (Linn.), which had its left elytron .75 mm. shorter than its right. This seemed to me a curious and very noticeable deformity, and one I had never before observed. But on 13th December ensuing I discovered that a fine, robust specimen which I had taken from decaying hickory the day previous had its left elytron .25 mm. shorter than its right, this time the difference being much less, but still noticeable. I then examined fifteen other specimens of this species in my collection, with the following result: One with left elytron .25 mm. shorter than right; one with left .20 mm. shorter than right; one with left shorter than right, but the difference hardly appreciable; one (small specimen) with right .20 mm. shorter than left; and one in which the right was so slightly less than the left that the difference could scarcely be seen. The remaining ten showed no appreciable differences in this respect.