_ 
xcil 
the site. The beetle then walked about for a little time, 
demolishing any small accumulation of sand, rather unneces- 
sarily so it seemed. Whilst so occupied and without any 
warning it very suddenly spread its wings and would have 
flown off had it not been captured. An examination of the 
nest showed it to contain 138 cream-coloured eggs 4* of an 
inch in length.—A. L.” 
Forms OF PAPILIO DARDANUS BRowN, FROM NAIROBI AND 
THE HIGHER LAND TO THE West.—The Rey. K. St. A. Rogers 
exhibited examples of the female forms of Papilio dardanus 
Brown, captured recently at Nairobi, together with similar 
forms from the higher ground between Nairobi and the Rift 
Valley, kindly lent by Prof. E. B. Poulton for comparison. 
The Nairobi forms belong to the subspecies tibullus Kirby, 
and those from the higher ground to polytrophus Jord. The 
males call for little remark. They are distinctly less heavily 
marked than those from the East Coast and intergrade 
towards the much less heavily marked males of polytrophus. 
They undoubtedly suggest that the tbullus form has been 
modified by interbreeding with the polytrophus form, but 
on the whole they are quite as large as the Coast forms, 
whereas the polytrophus forms are appreciably smaller. 
The female forms shown consist of (1) triment Poulton, 
one specimen particularly exhibiting a great reduction of 
the black markings. In this specimen the markings of the 
fore-wing are practically identical with those of the male 
with the exception of the well-marked diagonal black bar 
and the pale spots in the hind-marginal black band. 
(2) A specimen intermediate towards the form hippocoon F. 
The markings are identical with those of hippocoon, but the 
pale colour is that of trimeni, but a little more ochreous. 
(5) hippocoon F. The East Coast form with large white 
patch in the hind-wing. This is the most abundant form at 
the lower levels. 
(4) lambornit Poulton. <A primitive trophonius with the 
pale markings rather more extensive and yellow instead of 
white. One specimen shows much more primitive characters 
in the fore-wing, the black diagonal band being practically 
* The typescript fraction is not distinct. It may be }.—E. B. P. 
