56 



Dr. G. B. LongstafE on 



The Hon. N. C. Rothschild's captures on the R. Atbara 

 derive especial interest from the fact that, since King's 

 time, no collector has worked so near to King's locality — 

 Ambukol. 



I have to thank alike draughtsman and printer for the 

 admirable plate. 



Col. J. W. Yerbury, R.A., and Mr. Roland Trimen, 

 F.R.S., have kindly assisted me with valuable information, 

 the latter having placed his MS. notes on Mr. F. C. Selous' 

 captures in the spring of 1911 at my disposal. 



Prof. E. B. Poulton, F.R.S., and his able assistants have, 

 as always, been most kind and helpful. 



Dr. F. A. Dixey, F.R.S., has allowed me to draw upon 

 his unique knowledge of the Pierinae and helped to guide 

 me through the mazes of the genus Teracolus and steered 

 me clear of many pitfalls. 



Localities Mentioned. 



