4 MB. GUY A. K. MARSHALL 0>' THE [Jan. 19, 



number of specimens of TeracoU, which I trust will minimise any 

 probability of error in the conclusions at which I have arrived. 

 Among the collections which I have seen I may mention those of 

 Messrs. J. M. Hutchinson and C. N. Barker in Natal, that of the 

 South-African Museum in Capetown, and those of Mr. Trimen 

 and Miss E. M. Sharpe in London. To the latter lady I am 

 further indebted for having kindly permitted me to examine several 

 collections from Central East Africa which are in her charge, and 

 notably the fine series of TeracoU collected by Mr. E. J. Jackson, 

 which are of more than ordinary interest owing to the careful 

 way in which the locality and date of nearly all the specimens are 

 recorded, details which are painfully lacking in most collections. 

 But this paper is chiefly based on the magnificent series of this 

 genus contained in the British Museum, which possesses a A-ery 

 large number of type specimens, and I have to thank Mr. Butler 

 for his courtesy in affording me every facility and assistance in his 

 power. 



"With regard to the Asiatic species I have only seen those in the 

 British Museum, which seem to thoroughly bear out the conclusions 

 arrived at bv Capt. E. Y. Watson in bis most interesting paper on 

 the Indian Pieriiue. (Journ. Bomb. Soc. 1894), and these conclusions 

 I have entirely adopted, as they are in complete accord with my 

 experience in South Africa. 



I have followed Mr. Butler and Mr. Trimen in including Idmais 

 and Callosune in the genus Terac-olus, for the species contained in 

 the three genera are so closely connected as to render it impossible 

 to draw any hard-and-fast line between them ; and a multipHcation 

 of ill-defined genera appears to me to be in every way undesirable. 

 As regards the arrangement of the species, the affinities of so large 

 and varied a genus cannot be properly shown in linear form ; and 

 although the order which I have adopted may be open to objections, 

 it gives a fair idea of the relationship of the species. 



The genus Teracolus reaches its fullest development along the 

 Eastern side of Africa, where all the largest and handsomest 

 species are found ; it ranges thence eastward through Arabia into 

 N. India, in both of which areas it is fairly well represented, but 

 becomes much scarcer in Central and South India, Ceylon being 

 its southern limit. In Africa it ranges across the Continent to 

 the West Coast in the South-Tropical and Extra-Tropical belts, 

 and has been recorded along that side as far north as Senegal. 



In this paper I provisionally recognize 72 species of Teracolus, of 

 which 61 are Ethiopian and 19 Oriental, eight species being common 

 to the two regions. Of these latter one species also occurs in the 

 Palfearctic region, viz. T. evagore, Klug (= noinia, Luc), which 

 has been recorded from Algeria ; and one of the Oriental species 

 also occurs in the Northern region, viz. T.fmishts. 01., which ranges 

 into Asia Minor. Of the African species, bo occur on the mainland, 

 one is peculiar to the island of Socotra {T. niveus, Butl.), and five to 

 Madagascar, viz. T. zoe. Grand., T. mananhari. Ward, T. guenei, Mab., 

 1\ siga, Mab., and T. euanthe, Boisd. Of the 55 Continental species, 



