200 TAPERS BY DR. B. CLEMENS. 



* * Neuration not alike in fore and hind-wings. 



§ Without a costal vein. 

 Subcostal vein bifid; with disco-central nervule; median 

 4-branched. Bombycidse (Oyhthrix). 



§ With a costal vein. 

 f With a more or less distinct intercostal cell. 

 Costal vein short; subcostal 3 or 4-branched. 

 Cell nearly circular, more or less distinct ; discal branchless ; 

 median 4-branched. Bombycidae. 



Costal rather long ; subcostal bifid, attenuated. 

 Cell long, narrow ; discal fold decided ; median 4-branched. 

 F. w. fold thickened. CoSSldse, 



f f Without an intercostal cell. 



\ With a long internal vein extended to anal 

 angle. 

 Costal long, free, simple. Subcostal 3-branched. 

 Disk usually open ; if closed without disco-central. 

 F. w. with the subcosto-inferior nervule furcate. Saturnidse. 

 F. w. Avith the subcosto-inferior nervule simple. 



Ceratocampidae, 



| \ With a short internal vein, near inner 

 margin. 

 Costal and subcostal veins parallel towards the base. 

 Subcostal divides interior to the discal vein. 

 Discal angulated, simple, arising from subcosto-post apical. 

 Antennas pectinated or filiform. Palpi very short. Tongue 

 almost obsolete. Wings often falcate. * Drepanulidae, 



\\X Without an internal vein. Subcostal bifid. 

 Median trifid. Discal nervule arises from subcostal. 

 F. w. costal vein bifid. H. w. tailed. Imagos papilio- 

 naceous. Uranidae. 

 Hind-wings with a bristle at the base. 

 Wings without long cilia, not pointed. 

 Hind-wings without a costal vein. 

 Submcdian and internal veins distinct, long. 



* Median vein 4-branched. 

 Hind-wings, costa dilated at the base. 



Subcostal curved, 3-branched, with an imperfect basal cell. 



* Characters drawn from Platyptcry.v (Drepana) lacertlnaria of Europe. 



