( cxii ) 



in both sexes, but especially iu the female, a considerable 

 resemblance to Mylothris agathina ; so much so that Mr. 

 Neave says that he has often mistaken the females, when on 

 the wing, for females of that species. This is the form 

 referred to in Proc. Ent. Soc. Lond., 1907, p. Ixv, though 

 some of the statements there made require modification in 

 the light of subsequent knowledge. A pair of this form 

 from Fwambo are the types of Mr. Butler's P. astarte. The 

 scent-scales are of the general jj/r/e« character, bvit longer and 

 narrower than in the Natal representative of that species. 

 Forms of the pigea group from British E. Africa and Uganda 

 depart from the Central African type and approach the Natal 

 pigea in size, in general aspect, and in the character of their 

 scent-scales, though the latter have usually a more marked 

 basal expansion. The resemblance to M. agathina also tends 

 to disappear in specimens from these more northern regions. 

 But in a pigea form from Toro (Uganda), which is perhaps to 

 be identified with P. ruhrohasalis, Lanz, the resemblance to 

 M. agathina is once more considerable. That this is distinct 

 from the ordinary pigea-iovTo. (which also occurs at Toro) is 

 made probable by the fact that its scent-scale is peculiar 

 in the attenuation of its basal expansion, thus contrasting 

 markedly with the scent-scale of the allied insect inhabiting 

 the same district. The basal flush and black marginal spots, 

 so characteristic of Mylothris, are in this Toro ruhrohasalis 

 especially well marked. In these particulars it corresponds 

 with Butler's P. astarte, but is readily separable from that 

 insect by its inferior size and distinctive scent-scale. 



P. dixeyi, Neave, also from Toro, is in both sexes very like a 

 Phrissvra. It is, however, clearly shown to be a Pinacopteryx 

 both by its neuration and also by its scent-scales. These have 

 the usual Pinacopteryx character, but are larger and longer 

 than any in the pigea group, having a widely-expanded and 

 rounded base, much like that of P. liliana shortly to be 

 noticed. The outline recalls that of a chemist's flask with a 

 very long neck. 



In the small yellow species, P. spilleri, Spill. (Natal and 

 British E. Africa), the scent-scale is rather short, with a 

 widely-expanded and angulated base. 



