EXPLANATION OF FORM AND COLOURING. 249 



The bird then ate two Gharaxes natalensis, tasted and rejected a Myc. campina, 

 tasted and readily ate in quick succession a Eurytela hiarbas, a N'eptis saclava, two 

 Henotesia perspicua, and a Myc. ccmipina. 



She then ate two Gharaxes cithceron, a Myc. canipina, and another Etijvytela 

 hiarbas. 



After two more Gharaxes {G. brutus) she tasted very thorovighly, being evidently 

 doubtful or disinclined, and finally rejected a Mycalesis Ga')npina, thoroughly tasted, 

 and had nearly swallowed but once more brought up and threw away a Neptis 

 saclava, refused without tasting a Neptis agatha, finally tasting it very slightly if 

 at all and again refusing it. She then crushed and ate very readily a Sarangesa, 

 refused at first a Eurytela hiarbas, quite likely taking it for a Neptis, but then 

 tasted it and, apparently reassured, swallowed it without further hesitation. She 

 then readily ate, after crushing each well, a Papilio lycetis $ and a Papilio dar- 

 danus S (with decided bean-smell), tasted slightly and refused Rhopalocampta 

 forestan (with a very strong smell — a mixture of prunes and Amauris) with much 

 subsequent shaking of her head and wiping of her bill, readily ate a Gharaxes 

 candiope, but, evidently replete, crushed and threw away a Gharaxes brutus natal- 

 ensis, afterAvards refusing Precis cebrene, Sarangesa, and Pyrameis cardui without 

 tasting. 



Fifteen minutes later she again refused all these butterflies and a Gharaxes 

 candiope. 



[Summary : — 



(1) Rejected N. medusa, ate 4 G. brutus, 2 G. cithceron, 1 G. candiope, 2 N. sa- 

 clava, 3 E. hiarbas, 3 M. campina, 2 H. perspicua, 1 P. lyceus, P. dardanus S , 

 1 Sarangesa. 



(2) Rejected N. saclava, N. agatha, M. campina, ate E. hiarbas, G. candiope, 

 P. lyceus, P. dardanus <S , Sarangesa. 



(3) On manner: after the last 2 G. brutus the rejections of N. saclava wei'e less 

 decided than that of M. cainpina. 1 commented at the time : " That this insect 

 i^M. campinct) is less liked than N. sctclavct, though possibly very near it, I felt no 

 doubt when witnessing the bird's treatment of each after the sixth Gharaxes, when 

 she had barely arrived at the Neptis-rejecting stage but emphatically rejected 

 Mycalesis." 



(4) Grades : — 



1. E, hiarbas, Sarangesa, G. ccondiope (and perhaps P. lyceus and P. dar- 



danus S )• 



2. iV^. saclava, on manner above. 



3. M. campina. 



4. N. medusa. 



E. hiarbas, N. saclava, and H. perspicua were eaten after the rejection of a 

 Myc. campina, and the acceptance of the latter butterfly immediately afterwards 

 was probably due to their stimvilating eflfect, as may have been several other 

 acceptances which I have accordingly omitted from the table.] 



The bird brought the last Neptis acceptance unusually close up to apparent 

 repletion-point — probably the result of stimulation, 



