252 DB. A. G. butlhh on butteeflies [Feb. 18, 



15. lOLAUS GLAUOra. 



. lolaus glaums, Butler, P. Z. S. 1885, p. 766. 

 cJ $ , Zaila, Somaliland, 23rd and 28th May, 1895 (Capi. Nurse). 



16. Tekacolus CALAIS, var. dybtamene. 



Pontia dynamene, Klug, Symb. Phys. pi. vi. figs. 15, 16 (1829). 

 ? , Aden, 8th March, 1895 ; d $ , 8th and 12th May, 3rd and 

 7th June, 1894 {Gapt. Nurse). 



17. Tekacolus phisadia, var. ahnb. (Plate X. fig. 13.) 

 Pontia ame, Klug, Symb. Phys. pi. 7. figs. 1-4 (1829). 



$ 5, 12th Eebruary; Lahej, 6th March; Haithalhim, 23rd 

 March, 1895 (Col. Yerbunj). 



In my paper on Lepidoptera from Somaliland (P. Z. S. 1885), 

 when describing T. ocellatus, a species the existence of which I had 

 previously suspected, I observed, " I have also no doubt that a 

 species intermediate between T. phisadia and T. vestalis will ere 

 long be discovered." In Staudinger's ' Exotische Schmetterlingo' 

 an African species was subsequently described and figured under 

 the name of Idniais castalis, which scarcely differs from the Indian 

 /, vestalis, and which, as I have since discovered, exhibits similar 

 slight variations. 



In my paper on Lepidoptera from Aden (P. Z. S. 1884, p. 478) I 

 pointed out that several species of Butterflies presented simple 

 variations, which had become fixed as local races in various parts 

 of Africa and Asia ; and it struck me that in the case of '1\ phi- 

 sadia, the female of which is extremely variable, we might still 

 expect to find evidence of its derivation from a black and white 

 type similar to those of India ; I therefore asked Col. Terbury to 

 look out for females of T. phisadia having this character. In this 

 he was perfectly successful, the two females obtained at Lahej and 

 Haithalhim being indistinguishable from females of Teracolus 

 ochreipennis (a species only doubtfully distinct from T. vestalis). 

 In this species, therefore, we still have evidence of descent from 

 the black and white forms of India. 



18. Tekacolus ti. 



Teracolus vi, Swiuhoe, P. Z. S. 1884, p. 435, pi. xxxix. figs. 6, 7. 

 cJ, Aden, 20th February, 1895 (Col. Yerhury). 



19. Teeacolus ohetsonome. 



Pontia chrysonome, Klug, Symb. Phj's. pi. 7. figs. 9-11 (1829). 

 ? , Zaila, Somaliland, 28th May, 1895 (Gapt. Nurse). 



20. Teeacolus heliooaustus. 



. Teracolus heliocaustus, Butler, P. Z. S. 1885, p. 768, pi. xlvii. 

 figs. 8, 9. 



5 , Zaila, Somaliland, 6th June, 1895 (Gapt. Nurse). 



A much faded exan^ple. 



