are the same as those between the two forms of P. antilope 
(compare Fig. 3 on Plate XII of Trans. Ent. Soc. Lond., 1902, 
with Figs. 3a and 35) and much greater than those between 
the forms of P. sesamus (compare Fig. 1 with la or 2 with 2a 
on the same plate). In the dry phases of actia and antilope 
the hooked tip of the fore-wing is even more recurved than 
in that of sesamus, while the prolongation of the anal angle 
of the hind-wing which is so marked a character in the two 
former is wanting in the latter species. These characteristic 
features in the contour of the wings in the dry antilope and 
actia are related to the beautiful and detailed resemblance of 
their under-sides to dead leaves, while the greenish-black under- 
side of the dry sesamus is well concealed by a general harmony 
with the dark shady environment which it seeks for pro- 
longed rest, rather than by any detailed special protective 
resemblance. Hence the necessity for a profound modification 
of shape is far less imperative in this latter. It has been 
pointed out that the upper-side differences between the two 
phases of actia are greater than in antilope. As regards 
their under-sides the reverse is the case, because this surface 
is so much Jess conspicuous in the wet phase of the former 
when compared with that of the latter species. It is, however, 
very far from being cryptic, attaining nearly the same degree 
of conspicuousness as Precis triment which Mr. MarsHauL 
considers to be another of the wet forms of antilope (l.c. pp. 
419, 420). The representation of a dead leaf by the under- 
side of the dry actia is slightly more elaborate than in antilope. 
Both species have an equally beautiful mid-rib-like stripe, but 
the former alone possesses the representation of two holes, the 
posterior minute, near the tip of the simulated leaf—due to 
white semi-transparent spots. Equally elaborate detail is seen 
in P. cuama, of which P. triment is the wet form. In Mr. 
Marshall’s opinion, however, P. antilope and P. cuama are 
two dissimilar dry forms and sima and triment two dissimilar 
wet forms of a single species. It is much to be hoped that 
the point will soon be settled by breeding. 
Mr. Marshall is to be warmly congratulated on this third 
South African species of the genus Precis, in which he has 
produced incontrovertible evidence of the specific identity 
