TORTR1C1NA. 183 



B. Anterior wings with the cos ta slightly and 

 regularly arcuated. 



a a. Palpi with the middle joint twice as long 



as the apical 8. ASTHENIA. 



a a a. Palpi with the middle joint nearly 



three times as lon(/ as the apical . . . .10. PAMPLTJSIA. 



C. Anterior wings with the costa arcuated. 



aaaa. Palpi with the middle joint not three 1 2. ANISOTJENTA. 



times as long as the apical J 7. STIGHONOTA. 



a aaaa. Palpi with the middle joint three 1 1. PCECTLOCHROMA. 



times as long as the apical J 6. EPHIPPIPHORA. 



a aaaa a. Palpi with the middle joint more 



than three tim,es as long as the apical . . 9. RETINTA, 

 aaaaaaa. Palpi with the middle joint four ) 4. SEMASIA. 



times as long as the apical J 5. EUCELIS. 



a aaaaaaa. Palpi with the middle joint 



five times as long as the apical . . . . 3. ROXANA. 



Genus I. PCECILOCHROMA, STEPHENS. 



Palpi longer than the head, remote, porrected horizontally, thickly 

 clothed with scales towards the apex of the middle joint ; basal joint 

 drooping, stout, pyriform, truncate ; apical slender, obovate, as long 

 as the basal ; middle stout, curved, ascending, thickest beyond the 

 centre, more than three times as long as the apical. MaxillaB as long 

 as the palpi. Thorax robust, ovate ; in the typical species with a 

 bifid crest or tuft behind. Anterior wings : length more than twice 

 the width ; costa regularly arcuated ; apex obtuse ; apical margin 

 rounded ; dorsal margin nearly straight. The discoidal cell lies nearly 

 in the middle of the wing, and extends nearly two-thirds its length. 

 The costal vein reaches the margin about one-third from the base. 

 Posterior wings ample ; apex sub-acute ; apical margin concave. 

 Abdomen slender, and tufted in the <$ , stouter in the 5 . 



The typical species are liable to considerable variation as to 

 colour; but, so far as is known among the British examples, 

 never ornamented with streaks or spots of a metallic lustre. The 

 variation is confined to the greater or less intensity of the 

 markings, which does not, as in Peronea, alter their character. 

 Some of the species are exceedingly common. The larvae feed 

 mostly on forest-trees ; but one of them (Po2c. Hawker ana) feeds 

 on Euphorbia par alias (the Sea Spurge), an herbaceous plant. 



There are at present seven British species included in this 

 genus, which are thus tabulated : 



