This species is described by me in Bull. Buff Soc., N. S., III., 85, not in the Geological Survey, as quoted in the Washington Catalogue. A comparison of the description proves that the insect before me could not have been M. olivacea. Its terms, both as to colour and markings, completely cover the description of M. circumcincta. There can, of course, be no reasonable doubt that the existing so-called “type” of comis is a specimen of olivacea, in which case the type label has been certainly transferred to another specimen after the type of comis was returned to Mr. Hy. Edwards. I do not remember that my type of comis was peculiarly set. The species was so much more vividly coloured that it did not even suggest to me olivacea, a species of which I possessed a long series.