260 ENTOMOLOGICAL NEWS. [Oct., '05 plains of northern New Mexico. (See Ann. Rept. Chief Eng. S. Geol. Surv. W. looth Merid., 1876, Append. J. J., pp. 511-513.) One of these, coronata, he cited as the type of the genus. Since corona fa is now considered to be congeneric with the Oedipoda plattci Thomas, we should use Trachyrhachis in place of Mestobrcgma and take for the type of the genus coronata Scudd. instead of plattei Thorn. Professor Jerome McNeill has suggested the generic name Mctator for Saussure's pardalina. (See Proc. U. S. Nat. Mus. XXIII, p. 394, PI. XXI, fig. 3, 1901.) Five New Species of Micronecta Kirkaldy (Aquatic Hemiptera). BY G. W. KIRKALDY. Until 1897 these tiny waterbugs (belonging to the family Corixidae and characterized by the conspicuous scutellum, by the head being similar in both sexes, strigil present in the males, length never more than 4^ mm., etc.) were invariably termed Sigara Fabricius, 1775, but in that year (Entomolo-gist XXX, p. 260) I pointed out that Sigara was strictly equivalent to Cori.\a Geoff roy, 1762 (incorrectly written Con'sa by many authors), and therefore proposed the name of Micro-necta ("tiny swimmer"). Two years later, Bergroth (Eut. Monthly Mag. XXXV, p. 282) erected a new genus, Tena--gobia, for the then known American forms, separating these on account of the structure of the pronotum, the posterior margin of which is emarginate in Tenagobia, more or less rounded convexly in Micronecta. Early in the next year* (Revue d'Entom. France, XVIII, pp. 101-4) Horvath revised the palsearctic species, raising the total from eight to twenty-three, and one has since been added. The learned Hungarian doctor's characters are based upon the subcostal furrow, the comparative length of the pronotum, etc., but I think the form of the mesoxyphus and antennae should not be neglected. I have not attempted, as yet, the examination of the strigil, * Dated Dec., 1899, but this journal is notoriously antedated.