nsect was discovered by the Rev. W.
Bree many years ago; but it is less abundant there than formerly, from the
repeated attacks of collectors, who catch all they can find. Other
localities, mentioned in various works, are--Brington, Huntingdonshire;
Shortwood, and some other spots, near Cheltenham; Charmouth, Dorsetshire;
Dover; Downs {155} near Glastonbury, Somerset; Downs near Marlborough,
Wiltshire; Broomham, Bedfordshire; near Bedford; near Winchester.

* * * * *

THE CHALK-HILL BLUE. (_Polyommatus Corydon._)

(Plate XIV. fig. 2, Male; 2 _a_, Female.)

_Colouring_:--Upper side, _male, pale silvery greenish blue_, with very
silky gloss, and shading off into a _broad black border_.

Female, dark smoky brown, with a leaden tinge, sprinkled near the body with
_greenish_ blue scales of the _same colour_ as the males; border of orange
spots, more or less visible. _Under side_ marked as in fig. 2 _a_, on a
brown ground, with a row of _red_ spots near border of hind wing.

The _caterpillar_ (Plate I. fig. 10) is green, striped with yellow on the
back and sides.

The _chrysalis_ is brownish, and of the shape shown at fig. 29, Plate I.

The _butterfly_ is out in July and August, frequenting chalky downs,
especially in the south, and where it does occur is often extremely
abundant. Occasionally it is found _off the chalk_, having been seen in
Epping Forest, decidedly _not_ a chalk district. Other localities {156}
are--Croydon; Brighton; Lewes; Dover; Winchester; Isle of Wight; Halton,
Bucks; Newmarket; Peterborough; Norfolk; Suffolk; Berkshire; Oxfordshire;
Wiltshire; Gloucestershire. At Grange, North Lancashire, it is the
commonest "Blue," _not on chalk_, but _limestone_.

* * * * *

THE ADONIS BLUE. (_Polyommatus Adonis._)

(Plate XIV. fig. 3, Male; 3 _a_, Female.)

_Colouring_:--Upper side, _male, brilliant sky-blue, without any lilac
tinge_, bordered by a distinct black line, the _fringe distinctly barred
with blackish_. Female, dark smoky brown, sprinkled near body with _pure
blue scales the colour of those of male_; border of orange spots, more or
less visible.

Under side, male, marked as in fig. 3; border of red spots.

Female, almost exactly like that of Corydon (fig. 2 _a_), but usually has
the black spots on the front wing smaller.

This is a most lovely little butterfly, the blue of its upper surface being
quite unapproachable among nati