18/3.] 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 de- 

 signation of species. 



Family Nymphalid^e. 

 Genus Protogonius, Hubner. 



1. P. HIPPONA. 



Papilio hippona, Fabricius, Gen. Ins. p. 265. n. 280 (1770); 

 Donovan, Ins. Ind. pi. 35. fig. 1 (1800). 



Papilio fabius, Cramer, Pap. Exot. i. pi. 90. figs. C, D (1779); 

 Stoll, Suppl. Cram. pi. 2. figs. la-d (\787). 



Var. Para (Grahame). B.M. 



Differs from the typical form in having the subanal spots of se- 

 condaries yellow instead of white, and the yellow band of primaries 

 rather broader ; mimics apparently Melincea idee, Felder. 



2. P. drurii, n. sp. 



Papilio fabius, Drury, 111. Ex. Ent. iii. pi. 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. 

 pi. 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 saneha, Butler. 



5. P. BOGOTANUS, n. Sp. 



Also allied to P. cecrops ; form of the preceding species ; prima- 

 ries 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, 



