DIURNAL LEPIDOPTERJ3. BUTTERFLIES. 47 



of vegetables ; but there are some that eat woollen stuffs, peltries, 

 &c. Generally these animals change the skin four times ; and 

 when they are about being transformed into the nympha or pupa 

 state, they enclose themselves in a shell or cocoon, constructed 

 of a silky material, secreted in particular organs, and 

 forced out through a kind of lip. In the nympha 

 state, the Lepidop'teree resemble a mummy, and are 

 called clirysalids (fig. 44) ; they are swathed, and 

 when they have undergone the changes they are des- 

 tined to experience, they escape from their case 

 through a slit they make on the back of the corselet. 

 In the perfect state, these animals feed exclusively on CHKVSALID. 

 the honey of flowers. 



17. The order of Lepidop'tera is. divided into three great 

 families ; namely, Diurnal Lepidop'terte, Crepuscular Lepidop - 

 tercv, and Nocturnal Lepidop'tera. 



18. The DIURNAL LEFIDOF'TERJG are recognised by their 

 wings, which are vertical when in repose (fig. 45), while in the 

 other two families they are horizontal or inclined. Their antennoe 

 are generally terminated by a small rounded club-like mass ; some- 

 times, however, they are tapering at the extremity, and curved 



Fig. 45. PAPILIO PHILENOR. 



17. How is the order of Lepidop'tera divided? 



18. How are the Diurnal Lepidop'tera- distinguished? What are their habits? 



