226 THE BRITISH NATURE BOOK 



Food plant Hedge mustard, cuckoo flower, charlock, cresses. 



Larva Green-blue, white stripe on sides ; like seed pods of food plant. 



Pupa Pale grey, sharp-pointed ; braced to stalk, looking like withered 

 fragment. 



Eggs White, changing to yellow, and purple. May, June (occasionally 

 later). 



Locality Well distributed. 



The illustrations show the emergence from the pupa found in the winter 

 on the dead stem of hedge mustard by the river side. 



8. Woodwhite (Leucophasia sinapis). White, with black tip to fore-wings 

 (female much fainter) ; thin, fragile body. 



Food plant Bird's-foot trefoil, yellow pea, vetch. 



Larva Green ; yellow line on sides. 



Pupa Resembles Cardamines, but not so hollowed ; green (sometimes 

 with pink linings). 



Eggs Yellowish, ribbed, shiny. May and July. 



Locality South Ireland, New Forest, Worcester, Lancashire, Devon, and 

 other counties ; very local. 



9. Pale Clouded Yellow (Colias hyale). Scarce; male, light yellow; 

 female, almost white. Blackish margins to fore-wings ; orange spot on 

 hind-wings. 



Food plant Clover, trefoil, etc. 



Larva Light green, but blackish, velvety back ; orange lines on sides. 

 Pupa Like Edusa (No. 10). 



Eggs Yellow-white, glassy, through orange to purplish ; ribbed and 

 reticulated. Larvae feed in June and August. 



Locality Very local : Kent, South Coast, Essex, and other places. 



10. Clouded Yellow (Colias edusa). Orange, with black borders. 

 Food plant Clover, lucerne, trefoils. 



Larva Dark green, tiny black dots ; yellowish side lines. 



Pupa Yellowish green ; row of red-black dots on body ; upright ; beak- 

 like protrusion from head. 



Eggs Tapering, ribbed, yellow to pink ; others in small batches. August 

 and September. 



Locality Generally distributed, but very uncertain. 



11. Brimstone (Gonepteryx rhamni). Unmistakable ; sulphur-coloured, with 

 orange spot on each wing. Hibernates. 



Food plant Buckthorn, alder. 



Larva Green, black specks ; pale low side-lines. 



Pupa Bluish green, of swollen, knobby shape, with pointed projection ; 

 braced with girdle. 



Eggs Pointed and ribbed ; green to yellow and purplish. July and 

 August. 



Locality Everywhere. 



