142 LLOYDS NATURAL HISTORY. 



The Black-veined White Butterfly measures about two 

 inches and a half across the wings, which are of a uniform 

 white, thinly scaled, and semi-diaphanous in the female, with 

 the nervures and the terminal nervures of the wing narrowly 

 black, but not incrassated, though the nervules frequently 

 terminate in dusky triangles on the hind-margin. The ciUa 

 are so short as to be almost obsolete. 



The larva (vol. i. pi. 3, fig. 3) feeds on hawthorn, sloe, and 

 various fruit-trees. The female lays her eggs on the ends of 

 the branches, with a coating of varnish so effectually weather- 

 proof, that they remain in security (sometimes, it is said, for 

 several years) till circumstances favour the exclusion of the 

 larvae. (If this is correct, it goes far to account for the 

 periodicity of the insect.) The larvae are black when young, 

 and live gregariously under a common white web. Subse- 

 quently, they become clothed with short hair, and striped with 

 reddish-brown on the sides. The pupa (vol. i. pi. 3, fig. 4) is 

 yellow or white, streaked and spotted with black. 



GENUS PIERIS. 



Pieris^ Schrank, Fauna Boica, ii. (i) pp. 152, 164 (1801); 



Latreille, Hist. Nat. Crust. Ins. xiv. p. iii (1805); id. 



Enc. Meth. ix. pp. 11, 119 (1819); Boisduval, Spec. Gen. 



Lepid. i. p. 434 (1836); Doubleday, Gen. Diurn. Lepid. 



p. 42 (1847) ; Schatz, Exot. Schmett. ii. pp. 60, 61 (1886). 

 Fofifia, pt. Fabricius, Illiger, Mag. Insekt. vi. p. 283 (1807); 



Steph. 111. Brit. Ent. Haust. i. p. 14 (1827). 

 Mancipiiufi, Hiibner, Tentamen, p. i (18 10?). 

 Catophaga, Hiibner, Verz. bek. Schmett. p. 93 (18 16). 

 Gajioris, Dalman, Vetensk. Acad. Handl. Stockh. xxxvii. pp 



61,86 (1816). 



B't for the mythological associations of the name Danaus^ 



