LEPIDOPTERA HETEROCERA. 1159 



iii. Alae angustae. - - - - - 11. Arna. 



c. Abdomen alas posticas paullo superans. - 7. Zanola. 



d. Abdomen alas posticas longe superans. 23. Thenopa. 

 b. Palpi caput non superantes. 



a. Alae posticae abdomen superantes. 



i. Corpus gracillimum. - 13. Cilix. 

 ii. Corpus gracile. 



* Alae posticae latae. 8. Anticla. 



** Alas posticae vix latae. - - 12. Cania. 



iii. Corpus sat robustum. - - - 21. Ganisa. 



b. Alae posticae abdomen ad aequantes. - 14. Nataxa. 



c. Abdomen alas posticas superans. - - 4. Moeesa. 

 B. Proboscis conspicua. ----- 3. Rose ma. 



Genus 1. DREPANA. 



Corpus gracillimum. Proboscis non conspicua. Palpi brevis- 

 simi, caput non superantes. Antennae tborace longiores. Pedes 

 graciles, nudi; tibiae posticae calcaribus quatuor breviusculis. Alae 

 latae ; anticae falcatae, apud costam convexae, margine exteriore un- 

 duloso aut indentato, angulo interiore rotundato. Mas. — Antennae 

 mediocriter pectinatae. Fcem. — Antennas vix pectinatae, longiores. 

 Drepana, Schr. Faun. Boic. ii. 2, 155. 

 Geometra, p., Linn. ; Wien. Verz. ; Gmel. ; Thunb. 

 Phalasna, p., Fabr. 

 Bombyx, p., Hubn. ; BorlcL ; Esp. 

 Falcaria, Haw. 



Prionia, Syssaura et Drepania, Hubn. Verz. Schmett. 

 Platypteryx, Lasp. pi. 27 ; Leach ; Boisd. 

 Platypteryx et Drepana, Steph. 

 Ancistrota? Hubn. 



Body very slender. Proboscis not visible. Palpi very short, 

 not extending as far as the head. Antennae longer than the thorax. 

 Abdomen not extending so far as the hind wings. Legs slender, 

 bare ; hind tibiae with four rather short spurs. Wings broad. Fore 

 wings falcate, slightly convex along the costa, undulating or in- 

 dented along the exterior border ; interior angle rounded ; discal 

 areolet intersected by a secondary vein ; second inferior vein more 

 than twice further from the third than from the first; third not 

 further from the fourth than from the second. Male. — Antennae 

 moderately pectinated. Female. — Antennae very minutely pecti- 

 nated, much longer than those of the male. 



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