158 Dr. T. A. Chapman and Mr. G. C. Champion on 
Egg of Lycena idas from a specimen preserved in formalin and 
so stained by colouring matter from the bit of leaf of Hrodiwm on 
which it is. Hence a dirty brownish, instead of the nearly white as 
when laid. The size is 056 mm. in diameter and about 0°3 mm. 
high. Edges rounded, top nearly flat. It has the usual network of 
white material rising into points at the intersections. At the margin 
of the top where the structure is most developed the pillars at the 
intersections are very thick, looking in some views like cones with 
rounded tops, in others like pillars as thick as the width of the spaces 
between them. In this situation they are arranged in triangles with 
five forming a pentagon (owing to curvature of egg), not six to a 
hexagon ; the connecting ridges are very narrow and sharp, and sag 
apparently nearly down to the true egg-surface. Taking a wider 
view, they are arranged in the usual “engine-turned” pattern. 
This sculpturing continues up to the micropylar area, a circle about 
0-07 mm. in diameter, with less than the usual dwindling, at least 
of the ribs, the columns nearly disappear, the ribs become more radial, 
and the cells between them more radially elongated. They change 
into the small cells of the micropylar area by the intermediation of 
a circle of rather square cells. The largest cells (marginal) are about 
0°05 mm. in their longest (radial) diagonal. Those of the micropylar 
circle are only about 0°01. 
Lycena argus caswiacus, a. var. 
(Plate V, figs. 16-19.) 
Lycxena argus was found at all the stations visited. At 
Vigo the specimens were about 26 mm. in expanse of very 
ordinary facies, but presenting traces of the peculiar 
character more marked in the Casayo specimens yet to 
be referred to. Such small specimens only occurred at 
Brafiuelas and Casayo as occasional aberrations. At these 
localities the form is a large one, up to 35 mm. in expanse, 
of a very brilliant blue above, reminding one of cordon, 
var. corydonius, and a uniform pale silvery tint below, 
fairly close to vars. hypochiona and bearensis. It differs 
from these further by a very fair proportion of specimens 
having on the hind margin of the hind-wing two or three 
of the red arches that are present in the 2; they are how- 
ever not orange or red-brown as in the female, but modified 
by the blue so as to be a rosy pink. I believe such ¢ 
coloration is recorded in an Asiatic form that otherwise 
differs, and the faintest traces of it may be seen even in 
