156 LEPIDOPTERA. 



The smallest and most delicately formed of the European 

 Pierince is the Wood White (Leucophasia Sinapis, Linn.), a white 

 butterfly with an ash-coloured spot at the tip of the fore wings, 

 which are comparatively long and narrow, and expand about an 

 inch and a half. It is found in shady woods, and has a very weak 

 flight, and although abundant in other parts of Europe, is always 

 scarce and local in the north-western countries. 



Nychitona, Butl., is a genus very similar to this, but with 

 shorter and broader and much rounded wings. It is found in 

 Africa and the East Indies. 



Eurema, Hiibn., is an extensive genus to which most of the 

 smaller white and yellow black-bordered butterflies of the Tropics 

 belong. They measure from an inch to an inch and a half in 

 expanse, and are frequently very common, but are often neglected, 

 both by collectors and authors, on account of their small size and 

 general uniformity of colouring. 



The White Cabbage Butterflies of our gardens belong to the 

 genus Pieris, Schrank. Three species are abundant in every garden : 

 the Large and Small White Butterflies, and the Green- veined White 

 Butterfly (Pieris Brassica, Rapce, and Napi, Linn.). The first is 

 easily known by its large size, and the deeper black tip to the 

 wings ; in the third species, the under surface of the wings is more 

 or less heavily veined with greenish. The Black- veined White 

 Butterfly (P. Cratcegi, Linn.) likewise hardly needs a description. 

 It is about the size of the Large White Butterfly, and is local in 

 the south of England. It is generally abundant on the Continent, 

 but there is only one brood in early summer, so that it rarely 

 appears much longer than a month on the wing, while there is a 

 succession of broods of the other species, which are to be found 

 almost all the year round. Our only other British species of 

 Pieris (P. Duplidice, Linn.) is a rarity in the southern counties ; 

 the under surface is tesselated with green. 



The species of Tuchyris, Wall., have rather pointed wings, and 

 are confined to the East Indies. Several are white ; but others, 

 such as T. Nero, Fabr., and T. Celestina, Boisd., are red or blue. - 



Delias, Hiibn., is another beautiful East Indian genus allied to 

 Pieris. The butterflies resemble Pieris in shape and size, and are 

 often white above with black borders; but the hind wings are 

 generally bordered beneath with a row of red spots. 



The genus Pieris has several representatives in South America ; 

 but one very singular allied genus is confined to that country. 



