230 



THE STUDY OF INSECTS. 



AA. Wings fissured. 



B. Wings with less than five fissures; usually the fore wings have 



one fissure and the hind wings two. p. 237 PTEROPHORIDJE. 



BB. Each wing split into six parts, p. 238 ORNEODID^E. 



Family PYRAUSTID^; (Py-raus'ti-dse). 

 The Pyraustids (Py-raus'tids). 



The members of this family differ from other Pyralids by 

 the following combination of characters. There is no fringe 

 of long hairs on the basal part of vein VII of the hind 



wings, and vein III B of 

 the fore wings arises 

 from the discal cell dis- 

 tinct from vein III 4 (Fig. 

 272). This family in- 

 cludes many small 

 moths; but it contains 

 also the majority of the 

 larger species of Pyra- 

 lids. Some of the species 

 are very striking in ap- 

 pearance. 



The Grape Leaf- 

 folder, Desntia fnneralis (Des'mi-a fu-ne-ra'lis) is a common 

 species, the larva of which feeds on the leaves of grape. 

 The larva folds the leaf by fastening two portions together 

 by silken threads. When full grown, it 

 changes to a pupa within the folded leaf. 

 The moth is black with shining white spots. 

 The male (Fig. 273) differs from the fe- 

 male in having a knot-like enlargement near 

 the middle of each antenna. There is some variation in 

 the size and shape of the white spots on the wings. In 

 some specimens the white spot of the hind wing is sepa- 

 rated into two or three spots. 



FIG. 272. -Wings of Nomophila 



FIG. 273 Desmia 

 Juneralis. 



