LEPIDOPTERA HETEROCERA. 



A. Pedes longissimi. 



A. Palpi asceadentes. 2. Macrodes, Guen. 



B. Palpi porrecti. 3. Ametris, Hubn. 



B. Pedes non longissimi. 



A. Tibiae posticae apice fasciculatae. 



a. Palporum articulus 3us longus. - 1. Trigonia, Guen. 



b. Palporum articulus 3us minimus. - 5. Midila, Walk. 



B. Tibiae posticae fasciculatae. 



a. Antennae maris pectinatae. - - 4. Neviasca, Walk, 



b. Antennae maris nou pectinatae. - 6. Masca, Walk. 



C. Tibiae posticae non fasciculatae. - 7. Platydia, Guen. 



Genus 1. TKIGONIA. 



Corpus vix validum. Proboscis brevissima. Palpi longius- 

 culi, erecti, compressi, pilosi, caput superantes ; articulus 3us lan- 

 ceolatus, 2i dimidio valde longior. Antennae graciles, pubescentes, 

 setulosae, corporis dimidio valde longiores. Abdomen lanceolatum, 

 apice compiessum et acuminatum, alas posticas valde superans. 

 Pedes longiusculi, femoribus tibiisque anticis dense pilosis, tibiis 

 mediis longis tumidis, tibiis posticis apice fasciculatis. Alas anticae 

 longiusculae, sat angustae ; posticae latae, subtruncatae. 



Brotis, p., Hubn. Verz. Schm. 303. 

 Trigonia, Guen. Delt. et PyraL 11. 

 Clatema, Cat. Lep. Het. 3rd Ser. 1543. 



Body moderately stout. Proboscis very short. Palpi rather 

 long, vertical, compressed, pilose, ascending above the head; third 

 joint lanceolate, much more than half the length of the second. 

 Antennae slender, pubescent, setulose, especially in the male, much 

 more than hall' the length of the body. Abdomen lanceolate, com- 

 pressed and acuminated at the tip, extending much beyond the 

 hind wings. Legs rather long; fore femora and fore tibiae densely 

 pilose ; middle tibiae long, tumid ; hind tibiae tufted at the tips, 

 with moderately long spurs. Fore wings rather long and narrow, 

 rectangular at the tips ; exterior border slightly angular at one- 

 third of its length from the tip, very oblique and very slightly exca- 

 vated bindward. Hind wings broad, somewhat truncated on each 

 side of the rounded angle. 



B 2 



