Papilio dardanus (merope) and Acrea johnstoni. 3809 
Godman (proteina of Oberthiir) ditfers from fallax and 
lycoa in that it is not sexually dimorphic. I have found 
males and females both present in the semi/ulvescens form 
and the white-spotted Amauris-like forms. Both sexes 
would probably be found in a sufficient series of any 
variety. It also differs in possessing squarish as compared 
with a rounded discal hind-wing patch, which is also more 
sharply defined because less invaded by internervular radii. 
In fallax the contour of the fore-wing has greatly approxi- 
mated from lycoa towards johnstonz, but the apex is still 
slightly more broadly rounded, and the costa of the fore- 
wing rather more bent. On the other hand, a concavity 
between the apex and the posterior angle, although faint or 
absent in the females, has now become distinct in the males 
of fallax,—as distinct as in johistoni. In this respect and 
the more uniformly dark ground colour of the hind-wing 
outside the discal patch these extreme eastern forms of 
lycoa show an approach to johnstont. The basal spots of 
the hind-wing under-side remain however precisely those of 
the western lycoa. 
A most curious change in lycoa as we advance from 
west to east is the shrinkage of the discal patch to a 
minimum at the N.E. of the Victoria Nyanza and its 
subsequent slight expansion further east. 
In the collections I have already mentioned supplied 
by the generosity of many friends Acrea johnstont was 
first found (in about equal numbers) accompanying the 
forms of lycoa (fallavz) in the Tiriki Hills; and in far 
greater numbers at Kilimanjaro, Taveta, and Taita. The 
great majority are easily separated from the /ycoa (fallax) 
forms by the characters already mentioned but interme- 
diate individuals certainly occur. The most striking of 
these appeared among four males sent to me from the 
Kenya District by my friends Mr. and Mrs. 8. L. Hinde. 
Of three specimens captured on February 8, 1903, at Fort 
Hall (about 4000 feet) two are obvious johnstoni while the 
third possesses a well-defined buff patch intermediate in 
outline between fallax and johnstoni. The basal spots of 
the hind-wing under-side resemble those of fal/av. On 
the other hand, the spots of the fore-wing are white and 
not buff as in the males of fallax, The fourth specimen, 
captured above the Goura River (5—7000 feet) February 21, 
1903, is somewhat nearer to fallax and the fore-wing spots 
are buff. A very fine intermediate example also exists in 
