286 Colour and the Struggle for Life 
In fact the whole combination, except perhaps one Phytophagous, one 
Coprid and the Longicorn beetles, and the fly, fall under the hypothesis 
of Miller and not under that of Bates. And it is very doubtful 
whether these exceptions will be sustained: indeed the suspicion of 
unpalatability already besets the Longicorns and is always on the 
heels,—I should say the hind tarsi—of a Phytophagous beetle. 
This most remarkable group which illustrates so well the 
problem of mimicry and the alternative hypotheses proposed for its 
solution, was, as I have said, first described in 1902. Among the 
most perfect of the mimetic resemblances in it is that between the 
Longicorn beetle, Amphidesmus analis, and the Lycidae. It was with 
the utmost astonishment and pleasure that I found this very re- 
semblance had almost certainly been observed by Burchell. A 
specimen of the Amphidesmus exists in his collection and it bears 
“651.” Turning to the same number in the African Catalogue we 
find that the beetle is correctly placed among the Longicorns, that it 
was captured at Uitenhage on Nov. 18, 1813, and that it was found 
associated with Lycid beetles in flowers (“consocians cum Lycis 
78—87 in floribus”). Looking up Nos. 78—87 in the collection and 
catalogue, three species of Lycidae are found, all captured on Nov. 18, 
1813, at Uitenhage. Burchell recognised the wide difference in affinity, 
shown by the distance between the respective numbers; for his 
catalogue is arranged to represent relationships. He observed, what 
students of mimicry are only just beginning to note and record, the 
coincidence between model and mimic in time and space and in 
habits. We are justified in concluding that he observed the close 
superficial likeness although he does not in this case expressly allude 
to it. 
One of the most interesting among the early observations of super- 
ficial resemblance between forms remote in the scale of classification 
was made by Darwin himself, as described in the following passage 
from his letter to Henslow, written from Monte Video, Aug. 15, 1832: 
“Amongst the lower animals nothing has so much interested me as 
finding two species of elegantly coloured true Planaria inhabiting 
the dewy forest! The false relation they bear to snails is the most 
extraordinary thing of the kind I have ever seen.” 
Many years later, in 1867, he wrote to Fritz Miiller suggesting 
that the resemblance of a soberly coloured British Planarian to a 
slug might be due to mimicry” 
The most interesting copy of Bates’s classical memoir on Mimicry’, 
read before the Linnean Society in 1861, is that given by him to the 
1 More Letters, x. p. 9. 2 Life and Letters, ut. p. 71. 
3 «*Contributions to an Insect Fauna of the Amazon Valley.” Trans. Linn. Soc. Vol. 
xx. 1862, p. 495. 
