290 LEPIDOPTERA OP NORTH AMERICA. 



JO SI A Hu'bner. 



Body generally nearly linear and cylindrical, varying in length 

 and stoutness. Palpi variable as to length ; in some species much 

 shorter, in others a little longer than the head ; third joint varying 

 from one-eighth to one-half of the length of the second. Antennae 

 of the male generally more or less pectinated, sometimes simple ; 

 of the female generally simple, occasionally serrated. Abdomen 

 extending as far as the hind wings, or beyond them. Legs mostly 

 slender ; hind tibiae very generally with four spurs of various 

 length ; middle pair wanting in a few species. Wings black, 

 generally narrow, adorned with yellow, luteous, or white stripes, 

 bands or spots. 



Group Thyrgis. 

 Thyrgis Walker, 316. 



Fern. Body cylindrical, nearly linear, moderately long and slen- 

 der. Palpi a little longer than the head ; third joint linear, more 

 than half the length of the second. Antennae minutely serrated. 

 Abdomen obconical towards the tip, not extending beyond the 

 hind wings. Legs slender ; hind tibiae with four short spurs. 

 Wings broad, moderately long. 



1. J. tribuna Hiibner. Ephialtias tribima Exot. Sclimett. 24, 246, f. 491, 2. 



Luteous. Head, disk of the thorax and abdomen, with a dorsal 



black stripe. Wings black. Fore wings with a luteous stripe at 



the base and an oblique luteous band behind the middle of the 



wing. Hind wings with a broad luteous stripe. 



Cuba.^ 



Walker. 



DIOPTIS Hdbner. 



Body cylindrical, slender, generally long and linear. Palpi 

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

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

 tinated, occasionally serrated or simple ; of the female sometimes 

 pectinated, more often simple. Abdomen extending as far as the 



