241 
SILVER-STUDDED BLUE BUTTERFLY. 
Polyommatus Argus. 
PLATE XXXIII. Fig. 3. 
Pap. Argus, I, inn — Leuiin, pi. 39. fig. 5-7 Silver-studded 
Blue, Harris — 9 Pap. Idas, Linn. — Polyom. Argus, Jer- 
mya , Sleph. 
Male deep blue above, inclining to lilac, with a 
broad black band round the hinder margin of all the 
wings, the nervures likewise more or less of that co- 
lour ; the costa and fringe white, the latter occa- 
sionally obscured with brown at the base. The un- 
der side is bluish-grey, the blue becoming more in- 
tense at the base, adorned with numerous oeellated 
spots ; on the hinder margin of the posterior wings 
there is an interrupted orange-tawny band, contain- 
ing six bright silvery- blue spots, crowned with a 
series of black crescents. The female is entirely 
brown above, with a tawny marginal band, yvlucb is 
obsolete on the interior wings. 
The caterpillar is dull green, with the head and 
legs blackish, a ferruginous line along the back, and 
oblique ones of the same colour, bordered with 
white, on the sides. It feeds on broom, sainfoin, 
and various kinds of trefoil. The butterfly is rather 
Q 
