ORANGE-TIP. 93 



are most frequently deposited, but the greatei part of 

 the larixK must perish in this neighbourhood, because 

 the fields are mowed before the larvae are full-grown. 

 I have very often seen the larvae on the seed-pods of 

 Erysimum Alliaria, and have several times found the 

 pupae on the dead stems of this plant in winter ; . I 

 think that it is the principal food of Cardamines at 

 Epping; it also probably feeds on E. barbarca, and 

 other similar plants. Some years ago we used to have 

 a quantity of a large single rocket in the garden, and 

 there was always a number of the larvse of Cardamines 

 feeding on the seed-pods. Cardamine impatiens is so 

 local a plant that it cannot be the common food of the 

 larvce of Cardamines." 



The chrysalis is of the very singular shape shown at 

 ilg. 17, Plate I., a shape quite unique among British 

 butterflies, though that of the next slightly approaches 

 it. It i-s to be looked for in autumn and winter on the 

 dry, dead stems of the plants named in the foregoing 

 paragraph 



The perfect butterfly, which is very common through- 

 out the country, is met with from the end of April to 

 the end of May or beginning of June- 



