ad 
24 Dr. G. D. H. Carpenter’s Eaperiments on 
(Note.—I consider this point of great importance, 
See later.) 
Series R. Obs. 115. Jan. 2.—In the evening, M. having 
had as much vegetable food as he could eat, I took 
him a large Sphingid caterpillar of the Dezlephila 
type (Sp. 60), pale apple-green, with the usual spots 
on two of the enlarged anterior segments. These 
spots, however, could not be described as “‘ Eye-spots ” 
(though they could develop into such), as they con- 
sisted merely of dull yellow patches ringed with black. 
M. was very excited when he saw me bringing the 
caterpillar on its food-plant, and I kept it for a while 
just out of reach to let him see it well. I then let 
him take the stem on which was the caterpillar; he 
looked at the latter attentively and licked its head. 
It drew back the head into the enlarged segments 
behind, and bent the anterior part of the body round, 
parallel to the posterior part. This did not, however, 
prevent the monkey eating it with enjoyment, though 
he seemed to find much the same difficulty with it 
as a boy with a chocolate éclair! Watching him I 
concluded that he was not familiar with such soft, 
squashy insects. 
(Note.—This attitude of the caterpillar was extremely 
interesting because although, in this species, it was of 
little importance, in others which have eye-like marks 
the swelling of the segments bearing them, caused by 
the attitude, must very considerably increase the 
“alarming” effect of the eyes. (See Poulton’s 
‘Essays on Evolution,’ Oxford, 1908, p. 367.) 
It is tempting to suppose that this attitude, common 
to this type of larva, preceded the development of the 
spots described above into a more eye-like stage, 
which would thus be rendered more effective.) 
Series S. Obs. 116-134. Jan. 3. 
Obs. 116. Sp. 22.—At 7 a.m., before M. had had 
any food at all, I offered the Acridian, Dictyophorus 
productus. M. looked very hard at it, took it, turned 
it over and over, and pulled its legs. He then licked 
a little of the froth which exuded, white, from the side 
of the thorax, and dropped the grasshopper for good. 
He then ate some banana. 
(Note.—The fact that the legs of this species did not 
come off when pulled may be another example of the 
