318 LEPIDOPTEBA HETEROCERA. 



which is hy the tips of the hind wings ; these have a luteous hind 

 border. Length of the body 6 lines ; of the wings 18 lines. 



a. South America. From Mr. Warwick's collection. 



Genus 6. DIOPTIS. 



Corpus cylindricum, gracile, plerumque longum et lineare. 

 Palpi capite non longiores; articulus 3us 2o plus minusve brevior. 

 Autennae maris plerumque pectinatae, nonnunquam serratae aut 

 simplices ; fcemince nonnunquam pectinatae, saepius simplices. Ab- 

 domen alarum margines posticos attingens et plerumque superans. 

 Tibiae posticae quadricalcaratae, rarissime bicalcaratae. Alae plerum- 

 que limpidae, longae, augustae, nonnunquam latae. 



Dioptis, Hitbn. Verz. Schmett. 174. 



Body cylindrical, slender, generally long and linear. Palpi 

 varying in lengtb, not longer than the head ; third joint more or 

 less shorter than the second. Antennae of the male generally pecti- 

 nated, occasionally serrated or simple ; of the female sometimes pec- 

 tinated, more often simple. Abdomen extending as far as the hind 

 wings, and most often beyond them. Hind tibiae with four spurs of 

 various length, very rarely with two spurs. Wings mostly limpid, 

 generally long and narrow, broad in some species. 



Group 1. EROCHA. 



Mas. Corpus cvlindricum, sublineare, longiusculum, sat gra- 

 cile. Palpi pilosi, ascendentes, capite vix breviores ; articulus 3us 

 2i dimidio vix brevior. Antennae subpectinatae, corporis dimidio 

 longiores. Abdomen alas posticas quadrario superans. Pedes sat 

 validi ; tibiae anticae subtus pilosoe, non dentatae ; posticae calcaribus 

 quatuor longis. Alae mediocriter longae, sat angustae. 



Male. Body cylindrical, nearly linear, rather long and slender. 

 Palpi pilose, ascending, nearly as long as the head ; third joint 

 nearly half the length of the second. Antennae more than half the 

 length of the body, minutely pectinated nearly to the tips. Abdo- 

 men extending for one-fourth of its length beyond the hind wings. 

 Legs rather stout ; fore tibiae pilose beneath, not dentated ; hind 

 tibiae with four long spurs. Wings moderately long, rather narrow. 



