MORPHO. 195 



the family, is the only one found in Tropical America ; but 

 it varies so much in the shape of the wings and in other 

 characters that it might easily be divided into several genera, 

 if it were worth while to do so. The antennae are long, slender, 

 and gradually clubbed, the wings ample, sometimes long, and 

 sometimes broad, and there is a conspicuous spur at the base of 

 the median nervure of the fore-wings. There are also two sub- 

 costal nervules branching before the end of the cell. In the 

 Old World genera there is no median spur, and only one sub- 

 costal branch before the end of the cell 



We have figured two species of this genus, representing two 

 different groups. 



MORPHO ADONIS. 



(Plate XX riI2., Fig. I.) 



Papilio adonis, Cramer, Pap. Exot, i., pi. 61, figs. A. B. 



(1777). < 

 Morpho adonis, Godart., Encycl. Me*th., ix., p. 439, no. 3 (1823) ; 



Distant, Trans. Ent. Soc Lond., 1881, p. 397, pi. 20. 

 Papilo marcus, Schall., Naturforscher, xxi., p. 174, no. 4, pi. 



4, figs, i, 2 (1785). 



This species inhabits Surinam and British Guiana, and 

 measures from three and a half to five inches across the wings, 

 which, in the male, are of a rich sky-blue above, and of a 

 pearly-grey beneath, varied with light brown, with two or three 

 rather small eye-spots. The female is brown, with a broad white 

 band. It is a rare insect in collections, though a very similar 

 species, M. <zga^ Hiibner, which inhabits Brazil, is common. 



MORPHO ACHILLES. 



(Plate XXIX.} 



Papilio achilles, Linn., Syst. Nat. (x.), i., p. 463, no. 32 

 (1758); id. Mus. Ludov. Ulr., p. 211 (1764); Clerck, 

 Icones, pi. 24, fig. 2 (1764). 



