30 
on comparing with series, to be far inferior — a great contrast to 1006. 
Therefore, as in 2 s, so in $ s supenestival 1906 and increased—and 
sub>estival 1907 and decreased — sexual dimorphism went together. 
Statistics compiled from last 4 years’ takings as represented in one’s 
series of these species, Corydon, Bellary us and Icarus are given. They 
deal with the series here treated of in re a decided amount of blue in 
2 s, together with Nos. of totals of each species — 2 s. Collecting has 
been assiduous, in all the years fairly equally, except that in 1907 it 
was in excess perhaps of other years. 
(«) P. icarus specimens in collection with more than average blue. Total 58. 
1904 .. .. 8 =• 14% 
1905 .. .. 18 = 32% 
1906 .. .. 5 = 90% 
1907 .. .. 27 = 46% 
{!>) A. bellary us specimens in collection with more than average blue. Total 66, 
Kept on Account of Buueness. 
1904 
3 = < 5% 
3 = 
5% 
1905 
8 = < 13% 
6 = 
11% 
1906 
7 = <11% 
6 = 
11% 
1907 
48 = > 72% 
39 = 
72°' 
4. conjdon specimens 
in collection with 
much more than 
average 
Total 21. 
1888 = 28% 
1889 0 
1903 = 10% 
1904 0 
1905 = 19% 
1906 = 5% 
1907 = 38% 
5. Parallels to the melanism of Aylaia as seen in three supenestival 
summers are seen in Selene 2 s (and possibly in Euphrosyne). Hot 
spring seasons, i.e. (May and June), have been observed to coincide with 
incidence of unusally smoky 2 Selene, notably at Polegate, 1903.* 
6. And another parallel possibly occurs in incidence of T. paplda 
ab. Yaledna , occasionally in places, not in west of England, e.y., 
Polegate two examples, 1906, in 1393 also. This increase of sexual 
dimorphism coincided with two supenestival summers. 
As regards some other butterflies one feels more than suspicious 
that similar facts may be disclosed by further observations and in some 
or other lines than those travelled to-night, for instance. 
7. If the mimicry of 3 Galatea by 2 s (as shown by failure of 
ochreous on costa — primaries — and on undersides of secondaries) if 
this was commoner than usual — it was certainly very common — in 
East Kent this year (1907) an abundance of this variation occurred in 
a subsestival year, and spelled decrease of sexual dimorphism. 
8. Possibly in C. darns var. Rotldiebii, in B. rJianmi, in C. edusa, 
C. hyale, there may be evidence of one or of the other. 
9. With regard to U. comma, if observations have led to right 
conclusion, there is usually sexual dimorphism on underside, especially 
of secondaries. 
The 3 s are yellower as to ground colour and 2 s greener, and 
usually 3 var. is not much by way of green colour, 2 s however 
occuring in all, except perhaps supenestival years, much greener than 
average. 
* Also 1908, as in Ashdown Forest also, 
xviii. 
