682 Mr. G. F. Leigh on Synepigonic series of 
of attention, inasmuch as it is possible that the shock of 
abnormal conditions may have favoured slight reversion 
to a relatively ancestral form. It has been similarly 
observed that a set of abnormally small specimens of 
Limnas chrysippus, var. dorippus (= klugit), from Macha- 
kos Road, British East Africa, exhibited an unusual 
amount of reversion towards the type form of the species 
(Trans. Ent. Soc., 1902, p. 483). 
The very distinct di- and trimorphic forms of some of 
the chief Ethiopian mimics of Limnas chrysippus are still 
connected by transitional varieties which have been lost 
or are at any rate unrepresented in the primary model. 
Hence it has been argued that “A Study of Mimetie Forms 
may enable us to reconstruct the Lost Stages through which 
the Older Model has passed” (Trans. Ent. Soc., 1902, 
p. 482). In this case also it is seen that uninterrupted 
transition obtains between the cenea forms of the female 
mimic with white spots on the fore-wing and those with 
buff. In the Danaine models, on the other hand, there is 
a sharp break between the white-spotted Amauris albo- 
maculata and the buff-spotted forms of A. echeria, and 
even between the white and the butf varieties of the 
latter species. It is in every way probable that here too 
the transition which is witnessed in the younger mimic 
formerly existed, but has finally disappeared in the older 
model—viz. the two forms of Amauris echeria. As regards 
the origin and history of the differences between the two 
species which act as models—viz. albomaculata and echeria 
—the interpretation is at present less clear and convincing. 
It is unnecessary to describe the two hippocoonoides 
forms of females. A glance at Plate XXXI, Figs. 7 and 8, 
will show that the pattern is typical, although the size is 
abnormally small, especially in one specimen (Fig. 7). 
A careful comparison of the male individuals in the 
1902 synepigonic group leads to equally interesting re- 
sults. In this investigation I have confined my attention 
to the most distinctive feature of the pattern—the inner 
black band of the hind-wing. It will be seen that this 
marking is subject to remarkable individual variation 
in males of one family. At the same time it is the 
character by which the males of certain forms of the 
Papilio dardanus (merope) group are usually discriminated. 
It will be convenient to describe the appearance of the 
band in the best-known forms, before proceeding to record 
