8 



Zeuzerinae merely the basal half is strongly bipectinate, a feature which 

 at once serves to separate this subfamily from the other two. The 

 female antennae are either very slightly bipectinate or ciliate. In T. 

 Itisena 9 (we have seen no males) they are lamellate, approaching in 

 this respect Cossus cossiis, which has lamellate antennae in both sexes. 



SYSTEMATIC PORTION 



Key to Genera 



A. Anal veins of primaries united near margin by cross-vein Hypoptinae 



a'. With "cellula intrusa" on both wings. 



a'. Veins R and Mi of secondaries from a point or stalked ; one pair of 

 apical spurs Givira. 



bi. Veins R and Mi of secondaries separated and sub-parallel ; two pairs 



of apical spurs Hypopta. 



b'. Without "cellula intrusa" Pomeria. 



B. Anal veins of primaries not united. 



a'. Veins R and Mi of secondaries widely separate, antennae of S pectinate 



for basal half only Zeuzerinae. 



a''. Subcostal and radius of secondaries with cross-vein Zeuzera. 



b". Subcostal and radius of secondaries without cross-vein. .. .//a;»i/fara. 

 b'. Veins R and Mi of secondaries stalked or from a point beyond cell, an- 

 tennae of $ pectinate for full length. .Cossinae. 



a'. Vein Ri of primaries from areole Cossula. 



h'. Vein Ri of primaries from middle of cell. 



a*. "Cellula intrusa" on fore wings only Toronia. 



b*. "Cellula intrusa" on both wings. 



a°. Veins M: and M3 of secondaries stalked beyond "cellula 



intrusa" Faiiia 



b°. Veins M2 and Ma of secondaries not stalked beyond "cellula 

 intrusa." 

 a°. Size small, vein R of secondaries very slightly bent 



downwards near end of cell Comadia. 



b". Large size, vein R of secondaries strongly bent down- 

 wards near end of cell. 



a'. Sexes similar, thora.x thickly clothed Acossus. 



V. Sexes dissimilar, thorax sparsely clothed 



Prionoxystus. 



