970 DR. A. G. BUTLEB ON BLTTERFLIES [NoV. 28, 



common : an active and exceedingly restless insect of strong 

 flight — very difficult to take if once missed.'' Of the second 

 specimen, however, he w rites — " Newly emerged, evidently an easy 

 prey in the wet and cold of early morning." This, then, is clearly 

 the time to secure it. 



As might have been expected, the males are referable to the 

 typical Northern species, not to the more southerly T. opalescens. 

 To anyone with a correct eye for outline, the pattern of the 

 primaries in these local forms is absolutely different, apart from 

 all minor differences of colouring ; but the training of a lifetime is 

 insufficient to enable some men to appreciate the most marked 

 modifications of outline. 



42. Teracolus incbetus Butl. 



Intermediate phase. — $ , Athi Valley, 4000 feet, 16th December ; 

 cS 2 , Athi escarpment, eastern side, Kitwi, 18th December ; $ , 

 Msokani, 20th December, 1898 ; ^ , Tana Eiver, 3800 feet, 16th 

 January, 1899. 



Dry phase. — d , $ $, Tana Eiver, 3800 feet, 16th January, 

 1899. 



Mr. Crawshay says of the male — " Very plentiful just here (Athi 

 Valley) : this and the following taken in numbers when playing 

 together, with one stroke of the net." Of the female he says — 

 " An insect I have never before taken, and which, until settled, I 

 imagined to be another, rather common just here — plain sulphur 

 with an orange tip." In this conjecture Mr. Crawshay was quite 

 correct. 



43. Teracolus xanthits, var. metagone Holl. 



<S , Tana Eiver, 3800 feet, 16th January ; $ , Neugia, fCitwi, 

 30th January, 1899. 



S . " Fairly common, frequents the more o[)en country, dry and 

 desert-like, and covered with thorny scrub " {R. C). 



This is distinctly a dry-season phase, and differs from T. xanthus 

 var. comptus in the entire absence of the internal grey streak on 

 the primaries. 



44. Teracolus atjtevippe Boisd. 



(S , var. stibvenosits, Kitwi, 18th Januar}', 1899. 



4-5. Teracolus gavisa WaUgr. 

 $ , Kitwi, 19th January, 1899. 



46. Teracolus callidla Grose-Smith. 



d c? , Intermediate and dry phases. — Tana Eiver, 3800 feet, 16th 

 January, 1899. 



" Fairly plentiful ; but, if once missed, bv no means an easy 

 insect to take " {R. C). 



The typical orange form of this species is by no means too well 

 represented in the Museum series. 



