EXPLANATION OF FORM AND COLOURING. 843 



Exp. 160. — February 14. Hungry. Ate an unusually lavg-e feed of grasshoppers, 

 refused the last, but ate a F. angolanus with one wing, ate two or three more 

 grasshoppei'S, refused the next, but ate another P. angolanus, ate a few more small 

 grasshoppers and a P. lyoius, then a few more and this time not only finally refused 

 to eat any more Orthoptera, but also persisted in refusing to taste a one-winged 

 P. h/ceus, even when I had removed the wing. She nevertheless I'eadily accepted 

 and ate a P. natalensis © f., persistently I'efused to taste a Lachnovtera ayresi with 

 two wings, under surface shown, readily accepted and ate a P. artaxia, once 

 more refused the Lachnopiera, but finally accepted, held it, tasted it well, though 

 rather hesitatingly and with evident suspicion, and rejected it. 



Five minutes later she once more obstinately refused it, ate a P. cebrene, and 

 a,gain refused to taste the Lachnoptera. I now cut off the remaining wings of the 

 latter, all but a hindwing stump, and to this I applied the hindwing of a P. cebrene, 

 holding it in place with the forceps while I reofFered the butterfly. The roller at 

 once accepted it, but the Precis wing fell ofi'as I withdrew the forceps, leaving the 

 fulvous natural stump in full view. The bird certainly noticed it. She hesitated 

 for a second or two, then carefully craashed the Lachnoptera and swallowed it, 

 afterwards proceeding to taste and reject a wingless 5 P. lyceus and readily ate 

 a Precis natalensis f. and two Rliopalocamp>ta forestan. 



Five minutes later she ns readily ate a third Rh. forestan and a Rhopalocampta 

 libeon. None of these skippers possessed any appreciable smell. 



[Oi'der : — 



1. Precis natalensis f., P. artaxia, probably P. cebrene, and perhaps 



R. forestan and libeon. 



2. Papilio lyceus., P. angolanus, grasshoppers, and apparently Lach- 



noptera ayresi, %o like Atella and probably taken for it, but its 

 eating finally after a tasting perhaps less tinged with suspicion 

 may indicate that it should go higher.] 



Exp. 151. — February 20. Fed on gi"asshoppers, etc., rejected the last and 

 refused obstinately even to taste any others. She then accepted and crushed a 

 P. lyceus with one wing, held it for a considerable time and finally rejected it, 

 refused it without the wing, refused for a time, then tasted with disinclination or 

 suspicion and rejected a P. natalensis f., then similarly took a P. clelia, crushed 

 it carefully, and rejected it too. I was unable to decide whether this was the 

 result of repletion or of suspicion. 



Five minutes later she took the P. natalensis again with suspicion or disinclina- 

 tion, crushed and held it for a few seconds and threw it away, then treated the 

 P. clelia similarly, but ended by eating this, refused obstinately to taste the 

 P. natalensis again, readily accepted a Rhop. forestan with wings, crushed it well 

 and rejected it, accepted it again on my removing the wings, crush.ed and held it 

 for some time, and finally swallowed it. 



Five minutes later again she persistently refused even to taste the P. natalensis, 

 very readily accepted, crushed, and ate a Catopsilia florella with only one wing, 

 equally readily accepted a P. cebrene, but on crushing she paused, and having tasted it 

 yet further; threw it away. Viewed with suspicion a wingless body of ^ C. florella., 



