376 Dr. ©. Chilton on the 
of the clypeus than it is in A. geniculatus*, while in the 
latter species the chitinous disc bears a sharp transverse 
ridge on each side of the central peg. 
In Simulium austeni the egg-burster is very small and 
inconspicuous, and appears to have no membranous area 
surrounding it, but this may not be the case throughout 
the genus. I hatched out in 1915 a number of young 
larvee of S. angustipes, and, though these were not kept, my 
recollection of them is that they had egg-bursters as well 
developed as those of the Culicids. If this is so, it may be 
due to differences in breeding-habits between the two 
species. 
The subject is one of considerable interest and will 
certainly bear further investigation. 
XXXV.— The Amphipod Orchestia tucurauna, Fritz Miller, 
of Brazil, redescribed from New Zealand Specimens. By 
Cuas. Cuitton, M.A., D.Sec., LL.D., C.M.Z.8., Hon. 
Memb. Roy. Soc. N.S.W. 
On July 11th, 1910, I collected near the mouth of the Waitohi 
stream at Picton, New Zealaid, several specimens of a sand- 
hopper that I thought at the time would probably be Orchestia 
chiliensis, Milne-Edwards, which is common on the neigh- 
bouring shores of Queen Charlotte Sound and elsewhere on 
the New Zealand coasts. On examination, however, I found 
that, though two of the specimens were O. chiliensis, tle 
others differed considerably from O. chiliensis in the shape 
of the second gnathopods of the male. One male specimen 
of these was dissected and mounted and to some extent 
examined, and was provisionally named OU. redmani, sp. n., 
in my MS. in honour of Dr, Redman of Picton, to whom I 
am indebted for much assistance. I felt sure that I had seen 
somewhere a drawing of a gnathopod similar to the second 
gnathopod of this specimen, but at the time could not ascer- 
tain where this was ; consequently the specimens were laid 
aside for a more favourable opportunity. Recently, in 
looking up Stebbing’s paper in the Trans. Linn. Soe. vol. vil. 
p. 395, 1909, for another purpose, my attention was drawn 
to his figures of O. sulensoni (pl. xxx.C), owing to the 
* This character would appear to be variable, since the egg-burster is 
shown nearer the middle of the head in Scott-Mactfie’s figure than it 
appeared to be in the cast skins of the same species which J examined. 
