AN EXPEDITION TO MOUNT BATU LAWI. 99 
salis, gracillima, lansbergi, and hyperythra, as well as C. dohrnt 
of Kruger. 
Dr. Ris has most courteously permitted me to use a suggestion 
of his as to the definition of the genera Disparoneura and Caco- 
neura (Alloneura) which I have followed in referring the species 
described above to Disparoneura, involving a change in the defini- 
tion of the genus which will necessitate the transfer of all the 
species mentioned above from Caconeura to Disparoneura. He 
proposes to distinguish the genera as follows :— 
(a) Basal post-costal nerve placed in a level with the first 
antenodal or even proximal to it; no rudiment of Cu 2 (lower sector 
of triangle) = Caconeura. 
(b) Basal post-costal nerve placed at a level between antenodal 
1 and 2, mostly about half-way; rudiment of Cu 2 present or ab- 
sent = Disparoneura. 
He points out that the rudiment of Cu 2 seems to be indivi- 
dually and even asymmetrically variable in some species. 
Consequently I refer the present species to Disparoneura in 
the neighbourhood of the group of species named above. 
R.A. Soc.. No. 63, 1912. 
