236 



The Orders of Insects 



Fig. i_2g.— ^. Carrot Moth {Dcpressaria hera- 

 cliana, D.G.); a. b. caterpillar; c. pupa, 

 magnified i\ times ; d. tail-end of pupa, more 

 highly magnified ; f. shoot of parsnip, with 

 web spun by caterpillars, natural size. 

 From Riley, Insect Life, vol. i (U.S. Dept 

 Agr.). 



narrow and often pointed, 

 and a degradation of the 

 neuration sometimes re- 

 sults, many of the nervures 

 disappearing. The feelers 

 are thread-like, the palps 

 of the first maxillae are 

 often developed and the 

 palps of the second 

 maxilla; have pointed 

 tips. The forewings are 

 generally of uniform dull 

 or metallic colour with 

 distinct spots (fig. 129). 

 The larvs live openly on 

 plants, mine in plant- 

 tissues, or feed in cloth 

 and other substances 

 sheltering themselves with 

 cases. The pupal struc- 

 ture is highly variable. 

 In the lower sub-families 

 {Nepticulince^ Adillnce, 

 Tineinde) the pupa is in- 

 complete with three to 

 five free abdominal seg- 

 ments, and comes partly 

 out of its cocoon before 

 emergence, as in all the 

 families hitherto descri- 

 bed. But in the higher 

 sub - families {GeUchina 

 Plutellina, etc.) the pupa 

 is obtect with only two 

 free abdominal segments, 

 and does not come out of 

 the cocoon. The Tineida; 

 are universally d i s t r i- 

 buted ; over 700 species 

 are known in our islands, 

 the clothes - moths (see 

 fig. 169) being the most 

 familiar examples. 



Pterophoridae. — The 

 PterophoriJis or Plume- 

 moths are readily distin- 

 guished from all families 



of Lepidoptera (except the next) by the division of their wings into 



