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Show 32 DR. W. J. HOLLAND ON THE AFRICAN [Jan. 14, of long hair-like scales; hind tibiae almost naked and with two pairs of spurs. Type G. aburce, Ploetz. 115. G. ABURCE, Ploetz. Apaustus aburce, Ploetz, S. E. Z. vol. xl. p. 359 (1879), vol. xlv. p. 153 (1884). Hab. Tropical West Africa. G. DIVERSATA, var. nov. This form differs from typical G. aburce, Ploetz, in being prevalently lighter in colour on the underside of the primaries and the disc of the secondaries, the darker outer third of the secondaries remaining as in the typical form, and giving the appearance, therefore, of a dark diffuse hind marginal border to the wing. This form is quite common. About one-half of the specimens collected for m e in the Valley of the Ogove belong to it, but I cannot lead myself to believe that it represents a species. Save in the colour modification noted, the specimens otherwise agree absolutely Avith G. aburce, and there are a number of intergrading forms. (See next species.) 116. G. HETEROCHRUS, Mab. Pamphila heterochrus, Mab. Ann. Soc. Ent. France, (6) vol. p. 31, pi. iii. fig. 7 (1890); Novit. Lepidopt. p. 116, pi. xvi. fig. 4 (1893). Gastrochceta diversata, Mab. MS., in coll. Staudinger. Hab. Tropical West Africa. The figure of G. heterochrus in the ' Novitates,' was drawn from a specimen in the Staudinger collection, which has been labelled Gastrochceta diversata by Mons. Mabille. Another specimen which does not at all agree with the figure in the ' Novitates,' and the duplicate of which was pronounced by Mons. Mabille himself to be a hitherto undescribed species, is labelled in the Staudinger collection as the type of G. heterochrus. There has plainly been a misplacement of the labels. I have therefore taken the liberty of applying the name proposed by Mons. Mabille to this new form, of which there are numerous examples in m y collection, and which is plainly a mere colour variation of G. aburce, Ploetz (vide supra). 117. G. JOHNSTONI, Butl. (Plate II. fig. 6.) Aeromachus (?) johnstoni, Butl. P. Z. S. 1893, p. 673. Hab. British Central Africa (Butl.); French Congo (Good). I have several specimens of this little species from the Valley of the Ogove, agreeing absolutely with the type. It is closely allied to the species described herein as G. minima, Holl., but mav be distinguished at once by its somewhat larger size, and the fact |
