252 MR. R. SHELFORD ON MIMETIC INSECTS AND | Nov. 4, 
of the group in which it is manifest, the abundance and wide 
range of individuals in the species as well as of the species them- 
selves, together with the remarkable predominance of mimetic 
resemblances among them—all tended to create a strong suspicion 
that the mimicry is Miillerian (synaposematic). This suspicion 
is now justified. The discovery of many Bornean Longicorn 
mimics of Clytine renders it in every way probable that the 
group is specially defended by some unpalatable quality, and 
sometimes develops warning colours of its own which are decep- 
tively resembled by other beetles, although it usually makes use 
of warning colours which are common to more aggressive and 
even more highly-protected insects. Thus the conclusions which 
were found to hold in the case of the Cleridz (p. 248) also apply, 
with equal probability, to the Clytine. Since the above was 
written Mr. Gahan has shown me a beautiful example of Batesian 
or Miillerian mimicry within the group of Clytine, the common 
Demonax walkeri (Pasc.) being resembled in the closest manner 
by the rarer Perissus myops (Chev.). Both beetles had come to 
the British Museum in a single consignment from Ceylon. 
There is similarly a very remarkable resemblance, probably 
Miillerian, between NXvylotrechus pedestris and Demonax viverra 
compare figs. 29 & 35 on Plate X X.).—E. B. P. 
p g 
CoLEOPTERA OTHER THAN LonGicorns AS MImics. 
Mimic. Tillicera sp., near bibalteata (Gorh.) (Fam. Cleride). 
Plate XXITI. fig. 49. 
Model. Jutilla sp. near wrania (Sm.). Plate XXIII. fig. 48. 
The Mutilla has a red head and thorax and black abdomen, 
the second abdominal segment bears a white spot, the third 
segment is covered with a creamy white pubescence. In the 
beetle, the eyes and front of head are black, the vertex of the head 
and the prothorax are red; the elytra are black with one white 
band replacing the white spot and another sub-apical band 
paralleling the white abdominal segment of the J/utilla. Curiously 
enough, the male of this species of JJutilla bears a white band in 
place of a white spot, and hence the beetle more closely approaches 
the male than the female in its markings: still there is no question 
as to which sex serves as the model in this case. 
Several specimens of the same species of Zllicera and of a 
closely-allied one are in the Hope Collection, Oxford, all collected 
by Dr. A. R. Wallace in Sarawak. 
IV. LEPIDOPTERA AS MIMICS. 
So much has been written, by abler pens than mine, on mimicry 
amongst the Eastern Lepidoptera inter se, that I have confined 
myself to drawing up merely a table of such mimetic species as 
occur in Borneo, with the addition of a few notes on the bionomics 
of certain species. Three remarkable examples of lepidopterous 
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