684 Mr. G. I. Leigh on Synepigonic series of 
indicated. ‘The mark corresponding to the sickle is not 
bent in a curve but at a right angle. 
Meriones and antinorii, with non-mimetic females re- 
sembling the males (also accompanied by mimetic females 
in the case of antinorit), are certainly ancestral as compared 
with other forms of the group, and therefore it is almost 
equally certain that the interrupted black submarginal 
band of the male is ancestral as compared with the 
continuous band. 
The submarginal bands of the 6 males of the 1902 
synepigonic group may be briefly compared as follows :— 
Specimen 1.—Costal gap distinctly indicated, but closed 
by a broad sickle. Inner gap indicated by narrowing 
of band. 
Specimen 2.—Costal gap closed by a narrow sickle. 
Inner gap as in 1, but slightly less narrow. 
Specimen 3.—Costal gap open: inner much narrowed. 
Specimen 4,—Costal gap closed by a narrow sickle: 
inner still more narrowed than in 3. 
Specimen 5.—Costal gap indicated only by a slight 
narrowing (iess marked than in any other specimen). 
Inner gap open, with faint traces of narrow band. 
Specimen 6.—Costal gap closed by a narrow sickle: 
inner open, with a small detached spot midway 
between the nervules which form its boundaries. 
This specimen is much dwarfed, and it is possible 
that the marked discontinuity of the band may be 
due to reversion, brought about by the shock of 
abnormal conditions. 
The appearance of the band in the male parent is clearly 
indicated in Plate XX XI, Fig.2. The costal gap is closed 
by a sickle intermediate in breadth between those of the 
above-described specimens 1 and 4. The inner gap, only 
preserved on the left side, is more freely open than in any 
of the offspring. 
The male parent (see Plate XX XI, Fig. 2) is, I believe, 
somewhat less heavily marked in this respect than is usual 
in the Southern form of P. cenea, and the offspring are 
upon the whole also less heavily marked. At the same 
time, they exhibit very interesting individual variations, 
never quite reaching the open condition of the inner gap 
in the parent, but in half of the examples going beyond 
their parent in the degree of development of the costal 
Sor 
