some British East African Butterflies. 513 



near the N.E. shores of the Victoria Nyanza, far to the 

 W. of the Valley. Mr. Wiggins obtained 7 specimens 

 from the Tiriki Hills, about 20 miles north of Kisumu.* 

 These hills are covered with dense forest, and the collection 

 was made at a height of about 5100 ft. An eighth speci- 

 men was captured by Mr. Wiggins at Kakamega's (5500 ft.) 

 near Mumias on the Uganda Railway, about 15 miles N.E. 

 of Kisumu — a locality which did not come within the 

 scope of Mr. Neave's paper in the Novitates Zoologicge. 

 The 8 specimens were captured by Mr. Wiggins on the 

 following dates : — 



Kakamega's, Dec, 1902 ... one male. 



Tiriki Hills, Feb. 26, 1903 ... two males: one represented 



in PI. XXIX, fig. 3. 

 Tiriki Hills, Feb. 27, 1903 ... one female : represented in 



PL XXIX, fig. 4. 

 Tiriki Hills, Mar. 17, 1903 ... two males, one female. 

 Tiriki Hills, Mar. 19, 1903 ... one male. 



Corresponding Avith the fact that Mr. Rogers' specimens 

 came from the E. of the Rift Valley in a country where 

 the influence of the dominant Amaicris albimaculata (and 

 perhaps echeria, see p. 511) is at its highest and the 

 mimetic combination surrounding it of the greatest size, 

 the individuals of Neptis ivoodwardi are distinctly better 

 mimics than those obtained by Mr. Wiggins in an area 

 ■vvhere the two species of Amauris are less dominant and 

 attract a smaller association of mimetic species (compare 

 Figs. 1 and 2 with 3 and 4 on Plate XXIX). The four 

 white spots in the fore-wing are larger, and generally 

 much larger, in the eastern forms. A minute fifth white 

 spot close to the costa of the fore-wing is present in all the 

 E. specimens, absent from all the W. males except the one 

 captured on March 19. All possess this marking upon the 

 uuder surface, although in one of the Tiriki males it is 

 exceedingly minute. The feature upon which the mimetic 

 resemblance chiefly depends is the ochreous bar crossing 

 the hind-wing. This is so narrow in the W. males (Plate 

 XXIX, fig. 3) that they can hardly be said to belong to 

 the echcria-centxed combination at all. The two W. females 



* S. A. Neave in Nov. Zool. Vol. XI, 1904, pp. 323 and 350, 351. 

 See also Trans. Ent. Soc. Lond., 1906, p. 214, where the same author 

 points out that Neptis looodwardl is an outlying member of the 

 A. echeria-a.nd-albimaculata-centTed combination. 



