MORPHO CACICA. 121 



surface of last four segments black. Fore wing greyish ; a large 

 fuscous spot on costa near base ; an irregular fuscous patch in cell ; 

 costa above terminal half of cell fuscous ; an irregular curved line 

 from base of vein 2 to inner margin not far from base, from tbis line 

 another just above vein 1 towards base, but branching into a Y long 

 before it ; beyond cell a curved irregular band crossing wing, ter- 

 minating on inner margin near tornus ; a large patch on costa not 

 far from apex extending to vein 5 ; a series of small elongated 

 marginal patches. Hind wing fuscous, approaching semihyaline in 

 and about cell. 



Hab. Demerara. 



Appears to be nearest E. aoris, MoschL, but in that species 

 the terminal segment only is black, and the ventral surface is 

 white. 



Lynton Villa, Sydney Road, Enfield. 



MORPHO CACICA, Staudinger. 



This beautiful species has been regarded by many collectors 

 as only a variety or local form of rhetenor, Cramer. I have, 

 however, recently received some specimens from Peru, and 

 amongst them a very fine female, which, compared with that of 

 rhetenor, exhibits some very striking differences, leading to the 

 inference that the species are distinct. 



The main points are that the anterior wings of cacica are a 

 very light fulvous, the cell black to near the apex, where there is 

 a distinct fulvous spot quite absent in rhetenor, and in the latter 

 species the basal dark fulvous is suffused over the remainder of 

 the wing, whereas in cacica it stops sharp short at the cell. A 

 further pronounced difference is in the hind marginal band, 

 which in rhetenor is almost entirely black, with very small 

 spots ; that in cacica has large fulvous wedge-shaped markings 

 throughout the band on both wings. A further point is that this 

 band in the posterior wings of rhetenor extends right to the outer 

 edge ; whereas in cacica it is well cut off by a wide fulvous line, 

 intercepted in the centre by a narrow black one. Generally the 

 two species can be at once distinguished by the very much darker 

 colouring in rhetenor. 



The males received are all uniformly much larger than the 

 largest rhetenor examined, and all have the conspicuous submar- 

 ginal and costal white wedge-shaped markings. 



The sexes being therefore differently marked to their congener, 

 I think that Dr. Staudinger's name is a sound specific one. 



The specimen has been added to the museum of Mr. H. J. 

 Adams, of Enfield. 



William Watkins. 

 Eastbourne : March 30th, 1899. 



