( ix ) 



Evolution," 1908, p. 321, n. 1). But on the island of Fernando 

 Po, the type form, D. chrysippus, L., appeared to be far 

 commoner, for Mr. Bullock's series included three male 

 examples, viz. one-sixth of the whole series. The basal 

 section of veins 2, 3, and 4 of the hind-wing in two specimens 

 was narrowly outlined with white, but this is a common 

 feature in the type form. Fourteen examples, including the 

 single female, were alcippus, forming a gradually transitional 

 series from specimens with the maximum of white to those 

 in which it was reduced more and more, although never 

 greatly, by the increasing area occupied by the tawny ground- 

 colour. This increase was effected by a broadening of the 

 submarginal border and especially by an advance from the 

 costa and the base of the cell. In a single male, not included 

 in the series of fourteen, the invasion had been carried so far 

 that the specimen was nearly intermediate between alcippus 

 and chrysippus. 



The tint of the ground-colour also varied in an interesting 

 manner. In two of the type forms, seven alcippus and the 

 intermediate example, the ground-colour was sienna brown, 

 the tint most commonly found in African examples of these 

 forms : in one type form (with hind-wing veins outlined with 

 white) and one alcippus (with full development of white) the 

 tint was brownish orange, closely resembling that of Oriental 

 examples : in six alcippus, scattered indiscriminately along 

 the transitional series, the brighter tint was pronounced in 

 the submarginal border of the hind-wing, and recognisable, 

 to a varying extent in different individuals, in the inner 

 marginal section of the fore-wing. 



These two very distinct tints were also found in mainland 

 examples of chrysippus, and it would be an extremely interest- 

 ing piece of work to inquire into their development and pro- 

 portions in various parts of Africa and over the whole range 

 of the species. 



Comm. Walker commented on the first of these exhibits. 



A Bee bearing Pollinia on all its legs. — Mr. G. Meade- 

 Waldo exhibited a South African Carpenter bee (Xylocopa 

 hottentota, Smith), the tarsi of all three pairs of legs bearing 

 the pollinia of some Asclepiad flower. The specimen, which 



