1898.] PROM BRITISH BAST AFRICA. 409 



as well as a magenta-glossed crimson-tipped example (both new to 

 me) were in the series. 



82. Teracolus beiton-j, sp. n. 



(S . Teracolus lyhlegyas (part), Butler, cf. P. Z. S. 1894, p. 574. 



This species at all seasons differs from the preceding in the 

 extremely narrow and much more glistening lilac apical patch or 

 band on the primaries of the male, its black inner edging almost 

 or wholly wanting, and in the deep indentation or complete 

 separation of the internal black stripe on the primaries of the 

 female ; the latter sex is either white or yellow, the apical area 

 being either crossed by an orange patch or a row of white spots as 

 in T. imperator. The dry form of the male differs chiefly from 

 the wet form in the rosy colouring of the apex of the primaries 

 and the whole surface of the secondaries on the under surface, 

 whilst extreme wet types of the male are not only pearly white 

 below, but show an oblique discal series of black spots between the 

 costal vein and second median branch on the underside of the 

 secondaries : the female of the dry phase resembles the wet form 

 of T. plilefjyas on the upperside and the dry form of that species 

 on the underside ; it is, however, larger and shows heaA'ier black 

 markings. Expanse of wings, S 58-71 miUim., $ 62-69 

 millim. 



Wet form, c? c? S 2 , Taru, 24th & 25th November, 15th, 

 18th, 19th, & 20th December, 1896 (one pair talsen in copula). 



Intermediate form, c? , Mgana, 2nd August, 1896. 



Small, and with white unspotted under surface. 



Dry form. § , Ndara Hills, 7th April, 1897. 



Fifteen examples were in Mr. Betton's collection. 



83. Tebacolus incretus. 



Teracolus incretus, Butler, Ent. Month. Mag. xviii. p. 146 (1881). 

 2 2 ) M:gana, 30th August, and Samburu, 15th November ; (S , 

 Taru, 18th December, 1896. 



84. Teeacolus etarne. 



Pontia evarne, Klug, Symb. Phys. pi. vi. figs, 1-4 (1829). 

 Wet form, c? 6 , Mombasa, 7th January, 1S97. 

 Intermediate form. S, Mgana, 27th June, 1896 { = T. syrtinus). 

 Dry form. S , Yoi, 4th July, 1897 {=T. citreus). 



85. Teracolus heuglini (vars. T. thruppi & jacksoni). 

 Teracolus thruppi, Butler, P. Z. S. 1885, p. 770, pi. xlvii. fig. 10 



(Intermediate form.) 



Teracolus jaclcsoni, E. M. Sharpe, Ann. & Mag. Nat. Hist. ser. 6, 

 vol. V. p. 336 (1890). (Wet form.) ' 



1 The two forms seem to occur together at the commencement and end 

 of the wet season, so far as I can judge ; but they differ very little. A more 

 marked intermediate form may perhaps exist. 



