680 Mr. G. F. Leigh on Syncpir/onic series of 



A. albomacidata and the examples of A. echeria which 

 converge towards it. Two or three cripples were liberated, 

 but they were certainly cenca forms, probably white-spotted. 

 I feel confident that no wild eggs or larvae were 

 accidentally introduced with the food-plant, but cannot 

 be equally sure about the pupa3. I was not then very 

 familiar with these remarkably cryptic forms, and it is 

 possible that one, or even two or three, may have slipped 

 in unperceived. 



Comparison of the Individuals of the 1902 Synepigonic 

 Group of Papilio cenea. By E. B. Poulton. 



A considerable part of the 1902 material had been 

 dispersed before the present paper was written ; but I 

 iiave made a careful examination and comparison of the 

 whole of the remaining specimens recently presented to 

 the Hope Department by Mr. Leigh. These consist of 

 8 females (6 cenca forms and 2 hippocoonoides forms) and 6 

 males. In the first place it appears possible that the 

 presence of one male and two female (white-spotted Natal 

 cenca forms) specimens, which are distinctly larger than 

 the others and also larger than the parents of the group, 

 may perhaps be accounted for by the accirlental introduction 

 of wild pupae with the food-plant. 



When the 6 females of the ccnea form were minutely 

 compared it was apparent that they are not divided into 

 two distinct categories respectively characterized by the 

 buff tint and by the white appearance of the five chief 

 spots of the fore-wing. There was, on the other hand, the 

 most perfect gradation of the one form into the other. 



The five chief spots may be indicated by numbers as 

 follows : — 



(1) The largest spot, of an oval form, placed below the 

 cell, between the 1st and 2nd median nervules. 



(2) A spot, of which the form is usually oval, placed 

 beyond the end of the cell, between the 2nd radial and 

 3rd median nervules. 



(3) A roundish or oval spot, placed beyond the end of 

 the cell, between the 5th sub-costal and 1st radial nervules. 



(4) A roundish or oval spot, with its outer border 

 generally marked by a concavity. When the latter curve 

 is strongly marked the spot becomes crescentic (as in 

 Plate XXXI. Fig. 4) or reniform (as in Fig. 3). This spot 



