EXPLANATION OF FORM AND COLOURING. 349 



Exp. 161. — March 21, Rejected an H. misijjpus c? , but then also tossed aside a 

 P. cebrene. [Experiment therefore not worth continuing, time being short, and 

 the roller not hungry enough. The rejection of the Hypolimnas not necessarily 

 indicative of low grade.] 



Exp. 162. — March 27. Refused, then tasted, and at once rejected a black 

 gregarious Lepidopterous larva, | inch long, tasted and rejected the young green 

 larva of Gonimhrasia sp. (of Peb. 4), crushed very thoroughly and several times 

 seemed inclined to swalloAv the half-grown (1| inches) but already magnificently 

 decorated larva of Gyiianisa ethra, but in the end rejected it, refused absolutely to 

 touch the black larva or that of Gonimhrasia on re-presentation, again readily 

 enough accepted that of Gynanisa ethra, but after much battering ended by again 

 rejecting it. On my reoifering it, three or four times, it was each time taken but 

 after some slight crushing or battering dropped. I now produced a full-grown 

 Lepidopterous larva (3| in. x 0-7). The roller showed distinct fear or horror of 

 it, drawing back and opening her bill and once or twice snapping at it viciously, 

 and quickly withdrawing. Though I coaxed persistently I could not get her to 

 touch it. She then tasted with disinclination and rejected a B. mesentina and a 

 Terias senegalensis, ate readily a P. angolanus. A few minutes later she ate a 

 Bel. mesentina, but threw a T. senegalensis right away and then i-efused to touch a 

 second Bel. mesentina with such signs of dislike as seemed to indicate that the first 

 had been eaten inadvertently or at any rate out of turn. She also again refused 

 to touch the larva of Gonimhrasia (of Feb. 4), the black larva or the very large one, 

 but readily ate a P. angolanus and a Passalid, Eitmelosomus zanziharicus, brown 

 form, then leant forward and exerted a slight pressure on the elytra of an Amiantits 

 glohulipennis , and withdrew without attempting to take it from the forceps. But 

 she ate with great relish, though with an occasional shake of the head — the result 

 apparently of the strong pear-like smell, — a large bug, Holopterna alata. 

 [Order : — 



1. Holopterna alata, Papilio angolanus, and (if its acceptance 



was not merely the result of the Papilio's) Eumelosomtis 



zanziharicus. 

 '2. Gynanisa ethra, half -grown larva. 



3. Gonimhrasia sp., young green larva, also a black larva not 

 yet identified. 



4. Large larva, unidentified, regarded apparently with much 

 dislike, as the result presumably of previous experience of 

 itself or something like it. 



Though two of the moth larvae have not been identified, their placing is worth 

 stating for the indication it aflfords of the varying degrees of inacceptability that 

 exist amongst such larvte.] 



Exp. 163. — March 28. Tasted and rejected ant No. 31, but readily ate a 

 B. mesentina, wings and all, 



25* 



Amiantus 

 glohulipennis. 

 Terias sp. 



