10 Mr. H. Eltringham on the Forms and 



'o 



walls are less widely separated. It is in the uncus, how- 

 ever, that the greatest difference is shown. It is produced 

 dorsally into a long curved extremity, somewhat hollowed 

 beneath, and slightly widened laterally at its termina- 

 tion. Whilst all the forms of lycoa from its western type 

 to its most extreme modification in the Abyssinian sub- 

 species present no noticeable change in the structure of 

 these organs, so all the forms oi johnstoni, from the typical 

 male to confusa and fulvescens, and the subspecies toruna, 

 show the same form in the male genitalia, especially char- 

 acterised by the extremely long uncus and slender penis. 

 That these features are of specific value I have no doubt, 

 since I have also made preparations of the genitalia of 

 other nearly allied Acraeas, and find that they present 

 features which I need not here specify further than to say 

 that they are entirely different and characteristic. 



The male genitalia of the tormina form shown at fig. 3 

 afford little or no distinction from those oi johnstoni. The 

 claspers appear to be more distinctly lobed, but this is 

 a variable feature, and is found more or less developed 

 in some examples both of lycoa and johnstoni. The details 

 of the articulation of the claspers with the vinculum are 

 apparently rather different, though this point is not at 

 all reliable in a microscopic specimen, as the appearance 

 often varies with the point of view. The penis certainly 

 exhibits a similar formation to that oi johnstoni, and differs 

 in the same degree from that of lycoa. The uncus is 

 similar to that oi johnstoni. There can be no doubt that 

 toruna is as distinct from lycoa as i& johnstoni, and further, 

 that so far as the genitalia are concerned, it is indis- 

 tinguishable from other forms oi johnstoni. It appears to 

 be rare, and is certainly a local forra^ and, as already 

 stated, I think it must be regarded as a geographical race 

 or subspecies oi johnstoni. 



Finally, we are now acquainted with the larvae both of 

 A. lycoa and A. johnstoni, and it will be of interest here to 

 compare them. 



The larva of A. lycoa is figured by Aurivillius (Ent. 

 Tidskr., Plate 5, fig. 2, 1898), and is thus described :— 



"The larva is yellowish without markings, with black 

 head and black spines. The thorns are scarcely as long 

 as the diameter of the body." The figure shows the larva 

 as having all the spines black, including those of the sub- 

 lateral row, whilst the body has no rings or markings of any 



