16 



B. Three tubercles on middle annulet, none on the third. 



Tubercles IV and V approximate, two thoracic shields, 

 Psychidae. 

 BB. No more than two tubercles on middle annulet and usually 

 one on the third annulet, one thoracic shield (prothoracic). 

 C. Tubercles IV and V approximated or consolidated. 

 Generalized Frenatae. 



D. Tubercles simple, single haired. Cossidae^ Pyralidina, 

 ToHricina^ Tineina (in part), Lacosomidae, Sesiidae. 

 DD. Tubercles absent, as well as legs. Tineina in part. 

 DDD. Tubercles modified, many haired. 



E. All present but tubercle I. Pterophoridae. 

 EE. Subventral tubercles also reduced, only three 

 left. Pyromorphidae^ Megalopyyidae. 

 EEE. Substigmatal tubercles absent, only two left. 

 Eucleidae. 

 ,CC. Tubercles IV and V remote (sometimes IV disappeared 

 and then essentially the same arrangement as in EEE.) 

 Specialised Frenatae. 



F. Tubercles all present or with a slight tendency to 

 unequal reduction, setiferous or equally reduced. 

 G. Simple with a single seta: Noctuidae (in part). 

 Ayaristidae, JVotodontidae, Geometridae, Drepa- 

 nidae, Lithosidae (in part). 

 GG. Tubercles with many hairs. 



H. Without any development of hairs from 

 the skin. Noctuidae (in part), Pericopidae, 

 Arctiidae, Euchoniidae, Zyyaenidae, Lyman- 

 tridae. 

 HH. Tubercles greatly reduced, abundant hair 

 from the skin. Lasiocampidae. 

 FF. Tubercles with marked unequal reduction or greatly 

 modified or absent. 

 I. Tubercles still wartlike, hairy. (The young larvae 

 of many Papilionidae will also come in here). 



