TEBACOLUS. 29 



Underside.— '^imWox to that of the male, but a little more incliued to saudy-buff. 

 The characteristic post-median spots are larger than in the male, and have an addi- 

 tional posterior row of spots, which, however, are not very stroug-ly indicated. The 

 secondaries do not differ from those of the male. Expanse 2-4 inches. Spec. ex. 

 Nyasa-Iand ; Salcin-Godman Coll.; Mas. Brit.) 



Habitat. — From Delagoa Bay to Nyasa-land, and north to Victoria Nyanza. 

 Delagoa Bay [J. M. C. Johnston; Miis. Brif.; Mus. Rothschild). Nyasa-land 

 {H. IT. Johnston; Mus. Brit.). Lake ISTyasa {Thelwell ; Sahiin-Godman Coll.; 

 Mus. Brit.). Fort Johnston, Nyasa-land {Dr. P. Bended I ; Mus. Brit.). Likoma, 

 Nyasa-land, Jan. 24, 1896 {Rev. Percy Faulkner; Mas. Rothschild); Menga, 

 W. of Lake Nyasa, Jan. 30, 1895 {R. Crawsluuj ; Mus. Brit.); Bangara, 

 Aug. 18, 1895 {R. Crawsliay; Mus. Brit; Butler, P. Z. S. 1896, p. 835); 

 Victoria Nyanza {Bishop Ilanninyton ; Mus. Brit.). 



This species I consider to be quite distinct, on account of the strongly marked 

 inter-nervular streak of orange on the secondaries ; it is also larger than the allied 

 forms, and is more heavily marked with black. 



Dr. Trimen, however, does not consider its large size sufficient to warrant the separa- 

 tion of T. opalescens from the variable series of the female T. eris. Mr. Guy Marshall 

 also considers the type to be only a large female of T. eris (P. Z. S. 1897, p. 7). 



Dr. Butler (Ann. and Mag. Nat. Hist. (6) xx. p. 392) reiterates the characters on 

 which he separated this species, and calls attention to the " much broader orange- 

 yellow costal streak " on the secondaries. He writes : " Of our eight females three 

 ought to be called unusually large, four fairly large, and one rather small ; but the 

 name opalescens was given to the type because it was faintly opalescent on the upper 

 surface, and on the under-surface of the primaries, a character which I have since 

 discovered to be inconstant, as also is the width of the internal black bordering of the 

 primaries, which is frequently as wide again as in the type. The dry-season form is 

 smaller than that of the wet-season, the primaries comparatively shorter and broader 

 than in T. johnstoni, with the conspicuous black discal spots below which characterise 

 the wet-season form, and with a series of scaly brown spots across the under-surface 

 ot the secondaries between the nervules. These characters and the lack of the black 

 disco-cellular spots readily distinguish it from the dry form of the southern species." 



EXPLANATION OF THE FIGURES OP T. opalescens. 



Plate 10, fig. 1. 3 Nyaaa-land (//. //. .hlinston : Mits. Brit.). 

 „ la. Underside. 



,, lb. 9 Nyasa-land (//. //. Johnston : Mus. Brit.). 

 „ Ic. Underside. 



