154 Dr. T. A. Chapman and Mr. G. C. Champion on 
number, The costal spot is nearly always in the white 
band, in dorus it is usually largely or quite in the basal 
dark area. 
In dorus the fore-wing rarely has any rufous, but in 
mathewr it is not only frequent, but is usually more or less 
present on the fore-wing, when it appears on the hind 
one. 
The 2 is much darker than that of dorws, the hind-wings 
may be entirely dark except the eye-spots, and when 
rufous is present it is usually restricted much as in 
the ¢ f¢that have it. The fore-wings also have the rufous 
much restricted as compared with dorus, the dark hind 
margin is broader in all, often much broader, and the light 
colour may be restricted to a few patches. Additional 
ocelli are more frequent in the ? than the %, and indi- 
cations of 3 and 4 (upper-side of upper-wing) occur on 
several specimens. The under-side is perhaps paler than 
in the ¢, but the under-surfaces are practically identical in 
the two sexes. The expanse is f 27-35 mm., average 31; 
2 30-36, average 32 mm. There is one dwarf f only 
23m. Mathewi is thus smaller than any other (Spanish) 
dorus. The cilia are very pale, hardly perhaps white, and 
darker apically ; in dorus they are more nearly of the tint 
of the wing surface. 
Egg of Cenonympha mathewi, 0°84 mm. high; 0°7 wide. Has a 
hemispherical base and a flat top. The hemisphere is 0°7 mm. in 
diameter, from the margin of the hemisphere the sides rise for 0-4 mm., 
gradually narrowing (from 0°7) to 0°5 mm., here there is an almost 
angular margin, the nearly flat top further rising however to its 
centre about 0°09 mm. 
The central micropylar area has extremely fine cellular tracery of 
raised lines. Outside this the top nearly to its margin has large 
hexagonal cells, somewhat deeply impressed. These pass at the 
margin into longitudinal ribs running down the sides of the egg; the 
ribs are high and broad, the valleys between them flat and smooth. 
The secondary ribs are quite absent in the valleys but are indicated 
by beading or offsets of the primary ribs, which here and there project 
as fine ribs, just into the valleys, but never cross them. The ribs 
are not quite straight, occasionally branch, but more often end, 
between two others which approach beyond it. , 
The colour is an ochreous-yellow, with a small proportion of pink 
and darker to nearly black, in fine clouds and wisps, sometimes in 
little rings and streaks. 
