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Show 1896.] BUTTERFLIES O F T H E F A M I L Y HESPERIID.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 m e in this paper Osmodes thops may be a seasonally dimorphic form of 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 tf , 15 ? .) Pamphila adon, Mab. Bull. Soc. Ent. France, 1889, p. cxlix. Hab. Sierra Leone, Gaboon. The description given by Mons. Mabille is based upon a specimen in which the lower side of the secondaries shows but two silvery spots. I have 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. O. cnRYSAUGE, Mab. (Plate IV. fig. 7.) Pamphila chrysauge, Mab. C. R. 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 subapical orange spot being confluent with the orange-coloured discal area of the primaries. But the black marginal band 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 secondaries 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 chrysauge, 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 margiu, 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. O. ADOSUS, Mab. (Plate IV. fig. 10.) Pamphila adosus, Mab. Bull. Soc. Ent. France, (6) vol. ix. p. cxlix (1889). 2 . Pamphila argenteipuncta, Mab. M S . |
