I write no less to elicit information, than to offer such as my limited material affords. In a very interesting and origional paper on Asymmetry, published by the Boston Soc. Nat. Hist. 1869-71, Messrs. Scudder and Burgess describe and figure the genital armor of all our species of Nisoniades, making seventeen species, of which nine are new. Their Virgilius I have not, and doubt its validity, my specimens of Horatiushaving a mixture of the characters of the two species; the specimens differ somewhat from each other in armor, and, what is puzzling, are very different in size, though wonderfully alike colouring, and very unlike all our northern species in one respect to be mentioned.