162 
THE SWALLOW-TAIL BUTTERFLY. 
Papilio Machaon.—Britain. 
PLATE XXV. 
Papilio Machaon, Linn. Syst. Nat. ii. p. 750, No. 33.— 
Witk's Pap. tab. 47, fig. 1, a. 1.—Donovan’s Brit. Ins. 
pl. 209. 
THE upper surface of the wings is of a fine deep 
straw yellow. Upper wings long in proportion to 
the under ones, measuring three inches and seven- 
twelfths; their whole exterior margins are fur- 
nished with a broad black border, having near its 
outer edge a double row of longitudinal spots of the 
same colour as the wings, within which, on the 
upper wings, are corresponding fasciculi of small 
dots. Towards the external margin are two large 
oblong patches of black, in the middle of which are 
blotches of azure blue. Under wings considerably 
indented ; in place of the bundles of dots, are cor- 
responding blotches of azure blue ; and at the ante- 
vior angle of the lower wing, on the border, is a 
scarlet circular spot. 
The body is black, blue in the centre, having a 
longitudinal central line, extending nearly to the 
point of the tail. 
This Papilio and the Papilio podalirius, are the 
