44 
on this line, there is an increase of the thickness of this line and 
each nervure at the junction in all the following Lycaenids : — art)us 
( aeyon) astrarc/ie, Icarus, bellargus, cirion. 
In coij/don usually- — this results in the wing rays terminating 
in a longish triangle with the apex well up on the wing rays, a triangle 
of the same colour as the ground colour of the wing, therefore, in the 
female, brown of some tint. Present in all wings, usually much less 
marked in the $ than in the 2 , tending also less in $ to any ex- 
aggeiation, and, if unequally marked (except very rarely) on hindwings 
more marked than on forewings ; in corydon on the average this 
presents a great contrast to bellaryus. 
In bellaryus, the sexual difference is merely less marked; but 
otherwise similar statement to that in re corydon holds good in much 
less degree. Usually the increase from the little junction triangle is 
■very slight, and of colour of marginal line. Occasionally in 
bellaryus there is marked running of ground colour down wing rays 
between the “peacock spots.” 
As regards the other four species mentioned, except merely givin" 
statistics in table shown, I let them entirely stand over. 
In comparing corydon and bellaryus (by means of very limited 
statistics) — (in 2 ) — 
The forewing being used for comparison : — 
fhe triangular marking on the disc of this wing being noted and 
distinguished from mere circumferential thickening at the ed"e ■ _ 
We get 
In corydon, As well marked in ... ... ... no 
In bellaryus, „ „ ... ... . . q 
In corydon, As rather more than slight . lo 
In bellaryus, ■„ „ „ . 15 
In corydon, As slight or very slight . 0 
In bellaryus, „ „ „ ... ." 131 
opecimen of corydon compared ... ... ... 125 in toto 
and specimens of bellaryus compared ... ... 146 in toto 
In corydon, the chief range of differences occurs in those classed 
as well marked, 110 out of 125. 
In bellaryus, the chief range of differences similarly is in the 131, 
not paralleled by corydon ; but much less difference of degree occurs 
here than in the well marked corydon, which proportionately should 
be differentiated into many classes. 
Compared with the difficulty of a verbal description discriminating 
these species, in the female sex, and habitual (? invariable) easy coin 
fidence of the correct expert, and unanimous agreement if required of 
experts, and compared with the facile and early acquisition of this skill 
as regards these two insects whose resemblance (much exploited in a 
comparatively popular sense) is such a difficulty to the beginner, a 
ridiculous contrast is afforded by the little mentioned resemblance of 
2 s of icarus and bellaryus in the case of really puzzling specimens ; 
and here with these species—this test of the “ nervure-triangles ” (if 
I may so designate them), strangely enough, may I think be expected 
to fail. 
At this point one is reminded of one’s intention to claim for 
