152 



of mounted material, catalogued under 355 numbers in 1910 and 

 no less than 660 in 1911." 



V. — Prof. Poulton. 



Prof. Poulton exhibited some of the Bionomic Collections, 

 of which the following is a short account : 



The Bionomic Collections are in many respects the principal 

 feature of the Hope Department. It is only possible to enum- 

 erate the chief groups under which the very extensive material 

 is arranged : 



1. Examples of procryptic defence, especially among butter- 

 flies. Under this head may be placed A. H. Thayer's beautiful 

 model showing the meaning of the white undersides of animals. 

 This model is in the central court of the museum, on the ground 

 floor. 



2. Models and their mimics captured on the same day by the 

 same naturalist. These are principally Ethiopian, and are due 

 to the kind help of G. A. K. Marshall, Rev. St. Aubyn Rogers, 

 S. A. Neave, W. a. Lamborn, G. D. H. Carpenter, and especi- 

 ally C. A. Wiggins. 



3. Mimetic associations in the different zoological provinces, a 

 special feature being the American Papilio mimics of the distaste- 

 ful Aristolochia Papilios [Pharmacophagus) , the Ithomiine-centred 

 combinations of S. America, and the Ethiopian combinations. 

 The principal material from the Oriental region is the fine series 

 of mimetic associations described and figured by the late R. 

 Shelford. 



4. Families of dimorphic or polymorphic mimics with their 

 female parents. Chief among these are the families of Papilio 

 dardanus, bred by G. F. Leigh in Natal and W. A. Lamborn 

 in the Lagos district, ^ and of Euralias bred by the late A. D. 

 Millar in Natal, and W. A. Lamborn near Lagos. Associated 

 with these are the families bred by G. F. Leigh, proving that 

 Charaxes zoolina and neanthes are the dimorphic forms of a single 



^ Since the date of the meeting, by Dr. G. D. H. Carpenter in 

 Uganda, and C. F. M. Swynnerton in S.E. Rhodesia. 



