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Show 1873.] MR. A. G. BUTLER ON THE GENUS PROTOGONIUS. 773 ving at this improbable conclusion, I propose in the present paper to describe all the distinct and unnamed forms under their true designation of species. Family NYMPHALID^E. Genus P R O T O G O N I U S , Hiibner. 1. P. HIPPONA. Papilio hippona, Fabricius, Gen. Ins. p. 265. n. 280 (1776); Donovan, Ins. Ind. pl. 35. fig. 1 (1800). Papilio fabius, Cramer, Pap. Exot. i. pl. 90. figs. C, D (1779); Stoll, Suppl. Cram. pl. 2. figs, la-d (\787). Var. Para (Grahame). B.M. Differs from the typical form in having the subanal spots of secondaries yellow instead of white, and the yellow band of primaries rather broader; mimics apparently Melincea idee, Felder. 2. P. DRURII, 11. Sp. Papilio fabius, Drury, 111. Ex. Ent. iii. pl. 16. figs. 1, 2 (1782). Helicodes hippona, Doubleday, List Lep. Ins. Brit. Mus. i. p. 112 (1841). Brazil. B.M. Parallels Heliconius eucrate. 3. P. CECROPS. Protogonius cecrops, Westwood and Hewitson, Gen. Diurn. Lepid. pl. 49. fig. 2 (1850). Mexico (Salle) ; Guatemala (Salvin); Nicaragua (Delattre); Guayaquil. B.M. Mimics Melincea imitata of Bates. 4. P. QUADRIDENTATUS, n. sp. (Plate LXIX. fig. 1.) Allied to the preceding, but the apex of primaries not produced into an acute point and much less strongly falcated ; the apical yellow spot obsolete; the subapical band broader, undivided, distinctly quadridentate externally; the basal tawny area wider; secondaries with less spatulate tail; external brown border narrower, its inner edge nearly straight; the submarginal spots replaced by minute pale ochreous points; wings below altogether more silky, all the yellow markings replaced by dull brown; central band of secondaries broader, with one dentate projection towards costa. Expanse of wings 3 inches 6 lines. Bolivia (Bridges). B.M. Probably mimics Melincea zaneka, Butler. 5. P. BOGOTANUS, n. sp. Also allied to P. cecrops; form of the preceding species ; primaries above with the apical half and a broad streak on inner margin black ; basal half tawny, becoming yellow at inner edge of apical half; two spots (a large and a small) at apex, a moderately broad, |