Mr. C. O. Waterhouse on Aphelorrhina simillima. 363 
He argues that the specimen of A. simillima from which I 
took my description cannot be the one mentioned by Prof. 
Woodward asin the British Museum *, because I have stated 
that the posterior tibize have no spine on the outer edge, and 
give the length 94 lines; whilst Westwood says “ hind tibiz 
with a minute central tooth on the outside,” and gives the 
length 12 lines. Dr. Kraatz notes that Westwood’s figure 
measures 114 lines. That in German lines is 12 lines in 
English measure. 
No one with the Museum specimen of A. simllima before 
him could for a moment doubt that it is the one from which 
Westwood made his drawing ; and the figure cannot be mis- 
taken for the broad brightly-coloured A. Julia. 
As for the apparent discrepancies between Westwood’s 
description and mine, they are easily accounted for in the 
following way :— 
I have no doubt that Prof. Westwood made his drawing 
from the Museum specimen, and perhaps took a note or two 
from it. The description was very likely completed after- 
wards, and the measurement given from the figure. 
I do not consider that the posterior tibie have any tooth 
properly so called. On the outer edge there is a very slight 
angular enlargement; this is somewhat exaggerated in the 
figure on the right side, and still more so on the left. 
With regard to the measurements. I gave the length, 
taken in the ordinary way (from the apex of the clypeus to 
the apex of the pygidium), 94 lines; but this was an error on 
my part; I should have said 10 lines (English). [I very 
likely accidentally placed my compasses to the French lines, 
which I have on the same ruler.| Now, taking the separate 
parts of the insect from the specimen, I get the following 
result :—Head 2 lines, thorax 23, elytra 64, pygidium 1 (or 
1} from its base to apex), total 12 lines. 
The head and thorax being on an incline accounts for the 
difference when measuring the insect from tip to tip. The 
male example of A. Julia, for which I have given 12 lines as 
the length from tip to tip, gives 15 lines when measured 
piece by piece, which is not the ordinary way, and would be 
very misleading. 
I observe a peculiarity in Prof. Westwood’s figure which 
* There is only one specimen in the British Museum, which has been 
there since November 1838. Burmeister’s label ‘‘ Celorrhina simillima, 
Burm.,” is still preserved; and his description (Handb. iii. 1842, p. 209) is 
better than Westwood’s; it was written before, but published after, 
Aieeoroed The specimens of 4A. Julia were received in December 
878. ; 
