EXPLANATION OF Prate XXXVII. 
The figures are slightly under 2 of the natural size. 
The Western and Eastern races of the Nymphaline butterfly 
Pseudacraea boisduvali: its Acraeine models, Acraea egina, Western, 
and A. zetfes acara, Eastern. Resemblance between egina and zetes 
in the West. Western and intermediate affinities of the Uganda 
(Bugalla Isle) zetes. 
All the examples figured here and on Plate XX XVIII are in the 
Hope Department, Oxford University Museum. 
Figs 1. 
2. 
10. 
dia. 
12. 
13. 
Acraea egina 3. W. A. Lamborn. Oni camp, nr. Lagos, 
between Dec. 1, 1908, and Dec. 3, 1909. The model for 2. 
Ps. boisduvali boisduvali 3. Sierra Leone (Watkins and 
Doncaster). Mimics 1. 
. Acraea egina 9. W. A. Lamborn. Oni camp, nr. Lagos. 
Bred June 29, 1910. Model for 4. 
. Ps. boisduvali boisduvali 9. As male fig. 2. Mimics 3. 
. Acraea zetes g. W.A. Lamborn. Larva in forest nr. Oni 
camp, nr. Lagos. Bred June 23,1910. Pupated June 14. 
This shows the Western form of zetes, approaching egina 
(cfz 2). 
. Acraea zetes 2. As 5 for data. 
. Acraea zetes §. G. D. H. Carpenter. Open grass-land on 
Bugalla Island, L. Victoria, nearly 4000 ft. above sea- 
level. First half Sept. 1912. Shows the Western type 
of zetes, approaching 5, but not so completely as some 
other specimens from the island. 
. Acraea zetes 3. Same locality and captor as 7. This 
approaches more closely the Eastern type zeles acara, 
but has only a trace of the ochreous subapical tint. 
. Acraea zetes 9. Same locality and captor. Taken in 
coitéd with a male like 7. 
Acraea zetes, subspecies acara, 3. Rev. K. St. Aubyn 
Rogers, Rabai, 14 miles N.W. of Mombasa, 700 ft. above 
sea-level. May 22, 1909. Thoroughly Eastern type. 
Model for 11. 
Ps. boisduvali trimeni 3. Same locality and captor as 10. 
July 15, 1911. Mimics 10. 
Acraea zetes 2, subspecies acara. Same locality and captor. 
April 24, 1906. Model for 13. 
Ps. boisduvali trimeni 9. Rev. K. St. A. Rogers. Ndzo- 
vuni, 25 miles North of Rabai. Dense forest, 300-600 ft. 
June 10, 1911. Mimics 12. 
