PIEKm.E. 45 
developed, the lowest being larger than on upper side. Hind-ioing : on 
costa a narrow scarlet-red edging for a little distance from base ; sub- 
marginal spots inclining to be pointed inwardly, especially the fourth, 
which is smaller and thinner than all the rest ; hind-marginal spots 
greatly reduced, sublinear, crossed by yellow nervules, the upper three 
obsolescent or sometimes obsolete. Cilia white, widely interrupted 
with black at ends of nervules. 
^ Hind-iuing and (iisually) greater imrt of fore-wing paler or deeper 
[rather dull) yellow-ochreous ; Uach markings, especially hind-margined 
ones of hind-iving, in some examples much larger than in $. Fore-wing : 
basal reddish suffusion very much broader and sprinkled with grey 
scales, — filling about three-fourths of discoidal cell ; disc sometimes 
white, only submarginally tinged with yellow-ochreous, — sometimes all 
faintly tinged with that colour, but more deeply so submarginally ; 
lowest spot in submarginal row usually wanting ; hind-marginal series 
of spots variable in development, but lowest spot always larger than 
in Hind-wing : a wide basal reddish-grey speckled suffusion, reach- 
ing from costa to submedian nervure and almost filling discoidal cell ; 
submarginal spots (except the last) all larger and darker than in $ ; 
hind-marginal spots in one specimen of the same form as, and no larger 
than, in ^, but in two others so enlarged as to be all but contiguous, 
and sub-rhomboidal in form. Under side. — As in hut scarlet suffu- 
sion at base of fore-wing very much deeper in tint, and so much enlarged 
as to occupy three-fourths of discoidal cell and extend consider ahly helow 
it ; neuration whitish where on ochreous-yellow ground. 
This species, in both sexes, is subject to variation in size, and in the 
development of the hind-marginal spots ; and the ^ also varies much 
in the proportion and extent of the general sufiusion of dull yellow- 
ochreous in the fore-wing. Dewitz records that in examples from 
Chinchoxo, on the Loango Coast, the $ has no basal yellow on the 
under side of the fore-wings, and the ^ has the marginal markings 
much more extended than in the Querimba examples described by 
Hopffer. The variety named Sahrata by Butler is distinguished by its 
small size, and by the brighter, richer colouring of the under side of 
the J : it is represented in the British Museum collection (1886) by 
two J s and a $ from Zanzibar. 
Thysa is so remarkably like Agathina, Cram., in colouring and marking, 
that its real alliance with the group represented by Calypso, Drury, is apt to 
be overlooked; and up to 1866, when I had seen but one specimen (in the 
collection of the British Museum), I was misled into regarding it as a variety 
of Agathina. There can be little or no doubt that it directly mimics the 
common and widely prevalent butterfly just named. 1 Though recorded over 
rather a wide range in Africa south of the Equator, it appears to be ever}'- 
where scarce. Hopffer {op. cit.) states that the Peters Expedition brought a 
few examples from Querimba. I met with a solitary $ in Natal on 22nd 
^ It is very noticeable how closely the 9 follows all the variations of tint exhibited by 
the 9 M. Agathina. 
