THE CLASSIFICATION OF INSECTS 87 



mouth-parts, no food being taken in tbe adult state. The 

 larvae feed within the stems of plants, or in the wood 

 of trees. The three British species are the goat-moth 

 (Cossus ligni perdu), the wood - leopard moth (Zeuzera 

 ccsculi), and the reed-moth {Phragmatcecia castanece). 



The clearwings (Sesiidce) are day-flying moths, with 

 narrow wings, which are for the most part free from 

 scales. Many of the species resemble Hymenopterous 

 insects. The larvae feed within the stems and wood of 

 plants. 



The Tortricidce are a very large family of small moths. 

 Many of the larvae roll up the leaves of their food-plant ; 

 but other species feed within fruits, or give rise to gall 

 formations. There are many British representatives, well- 

 known examples being the green oak tortrix moth ( Tor- 

 trice viriduna), the codlin moth (Cmpocapsa pomo?icUa), 

 and the pine-shoot moth (lletinia buoliana). 



The Tineidce are an even larger family of moths, most 

 of which are very small. The wings are usually narrow 

 and pointed, fringed with long and delicate hairs. The 

 larvae have very various habits. Some feed openly upon 

 plants, others mine into the tissue of leaves, while not a 

 few are destructive to stored goods. The clothes moths 

 are familiar representatives of this family. 



The Pyralidai include the beautiful "pearl moths," 

 so-called because their wings exhibit a peculiar pearly 

 sheen, but most of their congeners are unattractive in 

 appearance. The larvae usually live in concealment, feed- 

 ing between rolled-up leaves, or upon dried vegetable 

 substances. Those of the flour moth (Ephestia kuliniella) 

 work much havoc in mills and granaries where they feed 

 upon the meal, sometimes blocking the machinery with 

 the webs which they spin. Allied species, such as the fig 

 moth (Ephestia jicella), infest groceries. This family also 



