1893.] JiE. E. Y. WATSOX OX THE nESPERIIDJi:, 35 



well before end of cell, almost equidistant from veins 8 and 6 ; disco- 

 cellulars and vein o barely traceable ; vein 3 well before end of 

 cell, equidistant from 2 and 4 ; vein 2 considerably nearer to end of 

 cell tbau to base of wing. Male with a tuft of long recumbent hairs 

 lying along the outer edge of the abdominal fold on the upperside of 

 the hind wing and attached along vein 1 h near its origin. Hind 

 tibiae with two pairs of spurs. 



zephiis, Butler. 

 Inhabits tropical South xinierica. 



34. Genus CEchydrus, nov. 

 Ty})e, che/'sis, H.-S. 



Antennae : club rather robust, bent into a hook. Palpi porrect ; 

 second joint long, densely clothed ; third joint short, obtusely conical, 

 almost concealed. Fore wing: apex very truncate, much as in 

 Sjmthilepia ; outer margin considerably longer than inner margin ; 

 cell two-thirds the length of costa ; vein ] 2 reaching costa almost 

 opposite the end of cell ; discocellulars slightly inwardly oblique ; 

 vein 5 nearer to 6 than to 4 ; vein 3 immediately before the end of 

 cell ; vein 2 twice as far from end of cell as from base of wing. 

 Hind wing much produced ; vein 7 well before end of cell ; disco- 

 cellulars distinct ; vein 5 very faint ; vein 3 immediately before the 

 end of cell ; vein 2 about three times as far from base of wing as 

 from end of cell. Hind tibiae fringed and with two pairs of spurs. 



Male with an erectile tuft of hairs at base of abdominal folds, much 

 as in Cogia. 



\ chersis, H.-S. ... 1. 

 \ evelinda, Butler. 

 *aziris,'YiQw 2. 



Confined to tropical America. 



'"' 85. Genus Porphyrogenes, nov. 



Type, omphale, Butler. 



Antennae: club very slender, sickle-shaped, terminating in a fine 

 point. Palpi: third joint bluntly conical, slightly projecting from 

 the clothing of the secontl joint. Fore wing : inner and outer mar- 

 gins subequal ; male with a costal fold; vein 12 reaching costa well 

 before the end of cell ; cell very long, almost three quarters the 

 length of costa; discocellulars inwardly oblique, the middle slightly 

 the longer ; lower margin of cell between veins 3 and 4 arched 

 upwards ; vein 3 well before the end of the cell, only slightly farther 

 from 2 than from 4 ; vein 2 slightly nearer to base of wing than to 

 vein 3. Hind wing : vein 7 shortly before end of cell ; disco- 

 cellulars and vein 5 barely traceable ; vein 3 from end of cell ; vein 2 

 more than twice as far from base of wing as from end of cell. Hind 

 tibiiu fringed and with two |)jiirs of spurs. 



In the male the inner margin of the fore wing is strongly arched; 

 there is a tuft of short hairs on a silvery patch on the upperside of 

 the hind wing at the origin of vein 8, there being a corresponding 



3* 



