208 THE STUDY OF INSECTS. 



B. Moths of medium or large size. p. 215 Hepialid.e. 



BB. Minute moths, resembling Tineids in appearance, p. 214. 



MiCROPTERYGIDiE. 



AAA. Winged, fore and hind wings differing in form and venation ; 

 the radius of the hind wings being simple, although frequently 

 apparently two- or three-branched ; this is due to the union of one 

 or two branches of media with it (Figs. 241, 242). (Suborder 

 Frenatce?^ 



B. Antennae of various forms, but never thread-like with a knob at 

 the extremity* (moths in part). 



C. The fringe on the inner angle of the hind wings as long as, or 

 longer than, the width of the wing; the hind wings often 



lanceolate, but never fissured, p. 246 Tineina. 



CC. The fringe on the hind wings shorter ; the hind wings not 

 lanceolate. 

 D. Wings fissured. 



E. Each wing divided into six lobes, p. 238. ..Orneodid^. 

 EE. Wings never more than four-lobed ; usually the fore 

 wings are bilobed and the hind wings trilobed. p. 237. 



Pterophorid^. 

 DD. Wings not fissured. 



E. Fore wings very narrow, the width at the middle less 

 than one fourth the length of the wing ; a considerable part 

 of the hind wings, and in many cases of the fore wMngs also, 



free from scales, p. 259 Sesiid^e. 



EE. Wings scaled throughout, or if clear with the fore wings 

 triangular in outline. 



F. Hind wings with three anal veins. Care must be taken 

 not to mistake a mere fold in the wing for a vein. When 

 there is no thickening of the membrane of the wing along 

 a fold it is not counted as a vein. 



G. Subcosta and radius of the hind wings grown together 

 for a greater or less distance between the apex of the 

 discal cell and the apex of the wing, or in some cases 

 separate but very closely parallel, p. 228 . .Pyralidina. 

 GG. Subcosta and radius of the hind wings widely sep- 

 arate beyond the apex of the discal cell. 



* In some moths the antennae are enlarged towards the tip, forming a 

 more or less distinct club ; but this club is quite different in shape from the 

 knob at the extremity of the antennae in the skippers and the butterflies. In 

 the moths with club-like antennae the ocelli are usually present, and the hind 

 wings bear a frenulum. 



