1896.] BUTTBttFLIES or THE FAMILT HESPBRIID-E. 41 



This species is much paler and brighter on the underside than 

 any other in the genus known to me. It is barely possible that the 

 species named by me in this paper Osmodes thops may be a seasonally 

 dimorphic form oE thora. The males agree almost perfectly upon 

 the upperside, but on the underside thops is invariably darker, 

 and the female of thops has the orange spots on the upperside 

 larger and differing materially in outline. 



134. O. ADON, Mab. (Plate IV. figs. 13 J , 15 5 .) 

 Pamphila adon, Mab. Bull. Soc. Ent. France, 1889, p. cxlix. 

 Bab. Sierra Leone, Gaboon. 



The description given by Mens. Mabille is based upon a specimen 

 in which the lower side of the secondaries shows but two silvery 

 spots, rhave a series of about one hundred specimens, which reveal 

 that there is variation in this respect from specimens which have 

 no silvery spots at all to those which have five or six. The type 

 specimen in Mons. Mabille's collection is one which I had the 

 pleasure myself of communicating to him, and represents a less 

 spotted form than is quite common. A similar specimen in the 

 Staudinger collection he has designated as a " type.'' This species 

 is undoubtedly dimorphic. I have specimens, larger in size than 

 the typical form, in which the deep black basal portion of the 

 primaries is not invaded near the inner margin by a narrow ray of 

 the bright orange of the median band, as is the case in the type. 

 But, aside from this, I find no distinction worthy of consideration. 



135. 0. CHEXSAUGB, Mab. (Plate IV. fig. 7.) 



Pamphila chrysaitge, Mab. C. E. Soc. Ent. Belg. 1891, p. clxxii ; 

 Novit. Lepidopt. p. 93, pi. xiii. fig. 4 (1893). 



Hab. Loko (Mabille), Cameroons (Good). 



This species resembles 0. laronia, Hew., at first sight, the sub- 

 apical orange spot being confluent with the orauge-coloured discal 

 area of the primaries. But the black marginal baud on the 

 primaries is even on its inward margin and not deeply incised at the 

 nervules, as is the case in laronia. The costal margin of the second- 

 aries is also much more broadly marked with black. Compared with 

 adosus, a closely allied species, it may be observed that the raised 

 patch of scales on the secondaries is oval in chrijsauge, and not so 

 nearly circular as in 0. adosus, and is blackish, not reddish, as in the 

 latter species ; there is a small, linear, velvety mark near this spot 

 upon the inner margin, which is entirely lacking in adosus. Besides 

 the ground-colour in 0. chrysauge is slightly paler than in 0. adosus, 

 and the black inner marginal border is narrower in the secondaries 

 than in the last-mentioned species. 



136. 0. ADOSUS, Mab. (Plate IV. fig. 10.) 



Pamphila adosus, Mab. Bull. Soc. Ent. France, (6) vol. ix. 

 p. cxlix (1889). 



5 . Pamphila argenteipuncta, Mab. MS. 



