410 DR. A. G. BUTLER ON LEPIDOPTERA [May 17, 



c? $ , Mgana, 19th July, 13th & 30th August ; 3 , Samhuru, 

 26th October ; 3 3 $ $ , Taru, 13th, 18th, & 20th December, 

 1896. 



86. TERACOLUS XANTHTJS. 



Teracolus xanthus, Swinhoe, P. Z. S. 1884, p. 440, pi. xxxix. 

 fig. 10. 



Wet form. 3 3 , Taru, 13th & 20th December, 1896 ; Mombasa, 

 7th January, 1897. 



Intermediate form. 3 $ , Samburu, 26th October and 6th 

 November, 1896. 



87. TERACOLUS ANTEVIPPE. 



Anthocharis antevippe, Boisduval, Sp. Gen. Lep. i. p. 572 

 (1836). 



Extreme wet form (var. subvenosus, Butler), 3 $ , Mgana, 

 28th August, 1896 ; Mombasa, 7th January j Manjewa, 13th 

 January, 1897. 



88. TERACOLTJS QAVISA. 



Anthopsyche gavisa, Wallengren, Lep. B-hop. Caffr. p. 13 

 (1857). 



3 $ , Samburu, 15th November ; , Taru, 18th December, 

 1896. 



89. TERACOLUS EXOLE. 



Anthocharis exole 3 , Beiche, Eerr. & Gal. Voy. Abyss, pi. xxxi. 

 fig. 4 (1849). 



Intermediate form (var. roxane, Felder). 3 $ , Taru, 22nd 

 November and 16th December, 1896. 



As these were sent in one envelope it is probable that they 

 were taken in coitu. This is an argument in favour of the 

 distinctness of T. exole from T. omphale : the male is imperfect. 



90. TERACOLUS OMPHALE. 



Pieris omphale, Godart, Enc. Meth. ix. p. 122 (1819). 



Wet form, tf $ , Mgana, 13th & 28th August ; Samburu, 

 1st November; $,Taru, 13th December, 1896; tf, Mombasa, 

 7th January ; Maungu Inkubwa, 21st March, 1897. 



91. TERACOLUS PSEUDACASTE. 



Teracolus pseudacaste, Butler, P. Z. S. 1876, p. 156, pi. vi. fig. 11. 



Intermediate form. 3 3 , Samburu, 26th & 28th October, 

 6th November ; J $ , 15th November, 1896. 



Wet form. 3 3 , Taru, 16th December, 1896 ; Mombasa, 7th 

 January, 1897, $ same date. 



The female from Mombasa is the blackest and most interesting 

 variety that I have seen. 

 [16] 



