916 DE. A G. BUTLEB ON BUTTEEFLIES [Dec. 4, 



their slight differences than the females to their greater ones ; 

 this is certainly the case with 0. guderiana and C. hollandi, of 

 which we possess long series. Breeding only can decide this. 



8. Chaeaxes caxdiope. 



Nymphalis candiope, G-odart, Enc. Meth. ix. p. 353 (1823). 



Euarka Eiver, 5500 feet, Kikuyu, April 15 & 22, 1900. 



" By great good luck, I came upon some six or seven of these, 

 usually very difficult to take, insects feasting vigorously on the 

 moist ground bordering on the stream, and was able to secure 

 five — four of them are absolutely perfect." ( K. G.) 



Unfortunately by the time these specimens reached me one of 

 them hod lost the tips of both antenna? ; one of the remaining 

 three also when set proved not to be absolutely perfect, two chips 

 having been snapped out of the right hind wing, apparently by a 

 bird ; nevertheless, considering how rarely it is possible to get 

 perfect specimens of this butterfly, those obtained by Mr. Crawshay 

 are wonderfully good. 



9. Chaeaxes zoolina. 



Nymphalis zoolina, West wood in G-en. Diurn. Lep. pi. 53. fig. 

 1, 2 (1850). 



<J 2 , Euarka Eiver, April 22, 1900. 



The male was obtained when at rest on the mud sucking up the 

 moisture, the female by a lucky stroke of the net as it dashed past 

 Mr. Crawshay in the forest ; the latter contained " sea-green 

 spherical ova." 



10. Peecis sesamus. (Plate LVIIL fig. 1.) 



Precis sesamus, Trimen, Trans. Ent. Soc. London, 1883, p. 347. 



Wet phase. — c? $ . Nairobi plains, April 14, 1900. 



Intermediate phase. — £ . Nairobi plains, April 20, 1900. 



Dry phase. — <$ c? . Nairobi plains, April 22 & 29, 1900. 



Of the intermediate phase, Mr. Crawshay rightly says : — " The 

 blue mingling with the scarlet of this insect is, I think, unusual." 

 Mr. Trimen has, indeed, figured an intergrade between the wet and 

 dry phases, but it is by no means so palpably an intermediate form 

 as that now secured by Mr. Crawshay, which is certainly the most 

 convincing bit of evidence of the specific identity of the two 

 extreme phases that I have ever seen, and as such is well worthy 

 of illustration. The Oxford Museum possesses a similar example. 



It will of course be noted that all three forms of this species 

 were secured in the same month and therefore could hardly be 

 spoken of correctly as seasonal forms ; they represent the forms 

 prevalent at certain seasons, but are not as yet exclusively confined 

 to those seasons : for this reason I prefer to use the term "seasonal 

 phase." 



