447 
Genus PIERIS. 
Pieris, Boisduval, Sp. Gen. i. p. 43i (183(3); Doubleday, Gen. Diurn. Lep. i. p. 42 
(1847). 
" Head rather small, hair)'. 
" E'l/es round, moderately prominent. 
" Labial jMljn longer than the head; the first joint generally much longer than the second, 
both stout, more or less cylindrio, especially the first, clothed anteriorly with long hairs ; 
third joint cylindric, slender, rather pointed, mostly as long as, or longer than, the second, 
clothed with short appressed scales, and a few hairs in front at the base. 
" Antennce of moderate length, with a short obconio club, generally compressed. 
" Thorax moderately stout, clothed with long delicate hairs. 
" Anterior winc/s more or less triangular, sometimes elongate, slightly falcate, or rounded 
externally. Subcostal nervure three-, or four-branched. Upper discoidal nervure united 
to the subcostal for some distance beyond the cell. Lower disoocellular rather long, 
curved inwards. 
" Posterior wings obovate, sometimes rather elongate, with the base slightly produced anteriorly ; 
sometimes more rounded. Discoidal nervule becoming a third median nervule. Inner 
margin forming a very distinct channel for the reception of the abdomen. 
" Legs moderately strong. Claws deeply bifid. Paronychia not quite equal to them in length, 
broad, subtriangular. f ulvillus as long as the claws, jointed. 
" Abdomem rather slender, not extending to the end of the wings, 
" Labva subcylindric, with the head small, rounded ; more or less clothed with hair. 
" Pupa angular, pointed anteriorly, not arched, sometimes tuberculate ; abdominal segments 
tapering to a point." {Doubleday, I. c.) 
Pieris napi. (Plate XLIII. figs. 1 c? , 2 ? .) 
Papilio napi, Linnaeus, Syst. Nat. i. 2, p. 760 (1767). 
Pieris nain, Lang, Butt. Eur. p. 31, pi vii. fig. 1 (1884). 
" Expands 1-50 to 1-87 in. Wings white, with the bases dusky. The nervures are distinct and 
black. The fore wings have the tips, and sometimes llie ends of the nervures, dusky. Male 
sometimes with, but often without, a small black spot midway between the centre and the 
hind margin. Female with two black spots, as in P. rapte. Hind wings with a black 
spot on the costa. The female is usually larger than the male, and is always darker, having 
blackish scales running along the course of the nervures. Underside : fore wings white, 
tipped with greenish yellow, with nervures conspicuous, and with two black spots, as in the 
allied species. Hind wings pale yeUow, with dark scales placed thickly along the course of 
the nervures, giving the appearance of green veins. 
" Larva o-reen, brighter on the sides than on the back ; the spiracles are marked with red and 
yellow. Feeds on various kinds of Griiciferce and Resedacea from June to September. lb 
hibernates as a pupa, which is greyish or greenish yellow, speckled with black." 
{Lawj, I. c.) 
