ADDENDA 
The atrata group of the genus Nacaduba 
I have submitted specimens of the genitalia of the Ceylon 
members of this group to the British Museum (Nat. Hist.). 
Capt. Riley agrees with me that we have four distinct forms, 
and asked me to name the new one. I call it Nacaduba 
sinhala. 
Adopting Fruhstorfer’s names for the others, our list will 
now stand as follows :— 
gz. NACADUBA SINHALA. Mii. Thisis my form 
**a’’_See page 53. 
93. NACADUBA PERUSIA PROMINENS. Fruh. 
My form ‘“‘b.” 
94. NACADUBA BERENICE CEYLONICA. Fruh. 
a3 
My form “‘c. 
gga. NACADUBA ATRATA GYTHION, Fruh, 
My form ‘‘d.”’ 
