258 MR- C. F. M. SWYiJNEtlTON ON THIl 



and P. angolamts, to all of which (and apf)arently at repletion -point) Catacroptera 

 ■\vas preferred. 



Sixth. H. dcedalus and P. cardui both dej&nitely preferred, B. liheon, P. ceryne, 

 and P. clelia preferred, if their eating was not the result of a special stimulation 

 of appetite, to P. natalensis f . ; C. vologeses preferred to Byhlia and P. angolanus ; 

 P. libeon to E. dryope ; blackish skipper and H. dcedalus also to E. dryope if not a 

 matter of special stimulation. 



Seventh. The eating of M. leda may have influenced that of L. thcdassina, but 

 S. djcelcelce (scented like Yjjthima) was nevertheless refused and a second M. leda 

 eaten in preference to it, while Gegenes was cei'tainly preferred to Ypihima and to 

 P. natalensis f., as was, less certainly, the blackish skipper. 



Eighth. U. perspicua and E. dryope both preferred to Ypthima and H. dcedalus 

 to Henotesia ; P. angolanus to N. saclava, P. natalensis (on manner) to Byhlia ; 

 and P. clelia (less certainly M. leda, H. perspicua, 0. hrutus) to both. 



Ninth. Pyrameis preferred to Henotesia and, on manner, Henotesia to Byhlia. 



SuMMART : — It is not easy to compress these preferences into a single table, 

 but the following attempt, to my mind, roughly represents the results of the 

 experiment : — 



, P. clelia, P. ceryne, H. dcedalus, P. cardui, C. cloantha, 

 C. candiope, C. vologeses, M. leda, G. hotteittota, 

 L. argia ^ . < R. liheon. 



. A. phalanthci, P. natalensis f., E. dryope, H. perspicua, 

 P. angolanus. 



/S, djcelcelce and 

 E. Malthas. 



C.3. N. saclava, Byhlia {goetziusV), Ypthima. 



M. leda was eaten in preference to P. artaxia and P. antilope, and P. cehrene to 

 the latter. There is nothing to show whether the two rejected species were placed 

 as low as P. natalensis or between it and Melanitis. 



Adding now the less certain placings (those complicated by a possible raising of 

 appetite), H. perspicua is placed above P. natalensis f . though still below Grade 1 , 

 G. hrutus and the blackish skipper are also placed above P. natalensis and perhaps in 

 Grade 1 , and JSf. cigatha, L. thalassina $ , and P. hippocoon are placed above Neptis 

 saclava. A doubt naturally attaches to these placings. 



Comment at the time. — " The bird seemed in excellent form and, an unusual 

 thing for her, went on eating at 5-minute intervals after repletion-point had 

 apparently been reached."] 



Exp. 38. — June 8. Very hungry indeed and ate readily, after crushing each, 

 Nychitona medusa and Acrcea serena r? , tasted and at once rejected Acrcea 

 Gcddarena, crushed and readily ate Acrcea ctsema, tasted and rejected Acrcea douhle- 

 dayi, readily ate Nychitona Tuedusa, tasted and rejected a very freshly emerged 

 Acrcea serenco $ and a $ Acrcea caldarena (the latter more emphatically), tasted 

 and readily ate a more rubbed $ Acrcea serena with, however, plenty of juice, 

 tasted and at once rejected each of two rather rubbed Acrcea caldarena c? , and 

 twice very thoroughly tasted and doubtfully rejected Danaida chrysippus, holding 



