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Show 30 DR. W. J. HOLLAND ON THE AFRICAN [Jan. 14, unmistakably separated from the others by the markings of the underside of the secondaries as represented in the photographic representation of substrigata given by me in the ' Entomological News'for January, 1894. Whether all of these belong to one and the same species remains to be proved, but the presumption seems to me to be in favour of this view. I do not, however, sink Mabille's species and my own as synonyms of placidus in the present paper, although inclined strongly to take this view. 111. A. BIGUTTULUS, Mab. Acleros biguttulus, Mab. Bull. Soc. Ent. France, (6) vol. ix. p. clxvii (1889). Hab. Freetown, AV. Africa (Mabille). From the brief description of the species given by Mons. Mabille, this species appears to me to be very near A. placidus, Ploetz (q. v.). 112. A. SUBSTRIGATA, Holl. Acleros substrigata, Holl. Ent. News, Jan. 1894, p. 28, pi. i. figs. 10, 11. Hab. Valley of the Ogove. This is possibly a form of placidus, Ploetz, as I have intimated above. 113. A. OLAUS, Ploetz. Apaustus olaus, Ploetz, S. E. Z. vol. xlv. p. 156 (18S4) ; Karsch, Berl. Ent. Zeit. 1893, p. 260. Hab. Loango (Ploetz), Togoland (Karsch). Ploetz in his catalogue of the species of Apaustus, given in the Stett. Ent. Zeit. 1884, places A. olaus immediately before his leucopyga, which is strictly congeneric with the species described under the same name by Mabille, and made the type of the genus Acleros. A good copy of Ploetz's drawing, pi. 744, shows that in form and pattern of marking olaus is indeed very near to leucopyga, Ploetz (ploetzi, Mabille); the main difference being the spots in the primaries noted by Ploetz in his original description. An examination of the figure of Ploetz makes it plain, furthermore, that the type was a female. It seems do me quite possible that the insect described was a female of the species previously described by Trimen as Pamphila (?) mackenii. Karsch apparently is not sure of his identification of this species as given in his article in the Berl. Ent. Zeit. quoted in the synonymy above. 114. A. INSTABILIS, Mab. Acleros instabilis, Mab. Bull. Soc. Ent. France (6) vol ix p. clxviii (1889). Hab. Zanzibar (Mabille). There are two females in the collection of Dr. Staudinger |