EXPLANATION OF FORM AND COLOURING. 327 



bitter-almond stench, and swallowed it. Her behavioui" reminded me of that 

 shown previously in connection with a Coreid bug, when 1 compared it to a 

 person swallowing a rather too strong liqueur. She then refused two dull-coloured 

 and usually highly acceptable grasshoppers. 



Ten minutes later she ate six or seven small grasshoppers before refusing to eat 

 any more, and then would also have nothing to do with a second bug of the same 

 species. 



[This bug was probably placed quite as high as, e.g., P. angolanus.'] 



Exp. 121. — December 13. I fed the bird on grasshoppers till she refused absolutely 

 to eat any more. She then persistently refused Papilio angolanus without tasting 

 and with shakes of the head, tasted and rejected a 5 Papilio echerioides, dead but 

 supple, again refused with shakes of the head the Papilio angolanus, but readily 

 accepted and ate, the second slowly, two moths, both Ophiitsa lienardi. She then 

 crushed and held for some seconds the large common brown Asilid, Alcimus 

 ruhiginosus, simply however through comparative repletion, for she then swallowed 

 it without sign of dislike, as also the moths Spirama capensis (Catocaline), jEgocera 

 fervida (Agaristid), Cyligramma latona and Nyctipao macrops (both Catocalinse). 

 The Mgocera received a longer crushing than the others, and was pi-actically 

 swallowed once and brought up again before being finally swallowed. That it was 

 eaten at all a little surprised me, for ic possesses a strong smell of its own which I 

 have always taken to be the outward and tangible sign of some inward and 

 vmpleasant properties. 



The huge Nyctipao, which 1 offered without wings, on the first — careless — 

 acceptance succeeded, in struggling to escape, in driving its very sharp spines into 

 the bird's lore and was at once hastily dropped. On my reoftering it it was accepted 

 quite readily, but the bird this time took the precaution of seizing it firmly right 

 across the thorax and crushing it at once. She was now utterly replete and refused 

 persistently even to taste Precis cebreoie, Catopsilia Jlorella, and Ophiusa lienardi. 



Twenty minutes later she accepted with hesitation, crushed and rejected the 

 foreleg of a rat [Mus decumamcs), refused without tasting Papilio angolanus and 

 Papilio echerioides 5 , but readily ate Precis cehrene, 



[Summary : — 



1. Ophiusa lienardi (and, in so far as not merely the 

 result of stimulation, Alcimus rubiginosus, 

 Spirama capensis, Cyligramma latona, and N. 

 macrops) to cebrene, etc., refusal-point. 



P. echerioides $ , leg of Mus 

 decumanus, and perhaps in 

 view of its first escape- 

 thi'ough an effective use of 

 its spines, Nyctipao macrops. 



2. ^gocera fervida (on manner: eaten probably as a 



result of stimulation). 



3. P. angolanus, grasshoppers.] 



Exp. 122. — December 14. Crushed and readily ate a Cryptacrus comes, shaking 

 her head as before, apparently to avoid the smell, and after swallowing it remained 

 with her bill wide open as though to let it escape. Ten minutes later she tasted 



