230 
BEDFORD BLUE BUTTERFLY 
they are very distinctly marked, and frequently many 
of them are obsolete, or entirely obliterated. 
The caterpillar is pubescent, of a greenish-yellow, 
deepest on the back; the head and legs black. It 
is found on the Buckthorn and Holly. 
The butterfly, which appears twice in the year, 
viz. in May, and near the end of July or in August, 
is plentiful in many parts of England. It is of fre- 
quent occurrence in Kent, Somersetshire, Hamp- 
shire, and Devonshire ; also near London, and in 
Norfolk and Suffolk. It is rather scarce in the 
north, although it is found not unfrequently near 
Newcastle, in places where hollies abound ; and also 
in Castle Eden Dean. 
BEDFORD BLUE BUTTERFLY- 
Polyommatus Alsus. 
PLATE XXXI. Fig. 3. 
Pap. Alsus, Donovan , ix. pi. 322. fig. 1. — Lewin, pi. 39. f. 3, 4. 
Bedford Blue, Leach — Small Blue Butterfly, Haworth. 
This is the smallest of British Butterflies, the 
wings sometimes not exceeding 10 lines between 
the tips, and seldom surpassing an inch. The sur- 
face is brown, with a silky gloss, one of the sexeB 
blightly tinged with blue, especially at the base of 
