PIERIS. 149 



Lepid. i. pp. 20, 156, pi ii. fig. 4 (1886); Rye, Brit. 

 Macro-Lepid. i. p. 13, pi. iii. figs. 1-5 (1895). 

 Pontia 7iapi, Stephens, 111. Brit. Ent. Haust. i. p. 20 (1827). 



Var. P. bryonicc. 



Var. Papilio bryonice^ Ochsenheimer, Schmett. Eur. i. (2) p. 



151 (1808). 

 Pierls bryon'CB^ God:irt, Enc. Meth. ix. p. 162, no. 146 (1819). 

 Papilio 7tapi, var. Esper, Schmett. i. (2) p. 87, pi. 64, figs. 3-5 



(1783) ; Hiibner, Eur. Schmett. i. fig. 407* (1803?). 

 Pieris napi^ var. bryoiiice^ Lang, Butterflies Eur. p. 32, pi. 7, 



fig. 2 (1881). 



Var. P. napcECE. 



Var. Papilio napcca^ Esper, Schmett. i. (2) p. 119, pi. 116, fig. 



5 (1800?); Hiibner, Eur. Schmett. i. fig. 664, 665 (1818?). 



Pontia iiapcece, Stephens, 111. Brit. Ent. Haust. i. p. 21 (1827). 



The Green-veined White is as widely distributed as the other 

 species of Pieris, but is not quite so abundant, and is per- 

 haps rather more fond of lanes and clearings in woods. It is 

 also very variable, and like the other species, is found through- 

 out the summer, being at least double-brooded. 



It is about the size of P. rapce, expanding from an inch 

 and a half to nearly two inches. The wings are white, with 

 the base blackish, and the tip of the fore-wings and a spot 

 towards the end of the cosla on the hind-wings brown or 

 blackish. The male has a black spot on the disc of the fore- 

 wings, and the female has two. On the under side the tips of 

 the fore-wings, and the hind-wings are sulphur-yellow, with the 

 nervures more or less strongly incrassated with dusky-green. 

 In the female the two black spots on the disc are reproduced. 



This is an extremely variable insect, and one of its forms {P. 

 sabcllic(V, Stephens) will be considered separately. Anotlier 

 form, P. 7iapceie (Esper), is larger than the typical form, the 



