Heteroeera from Costa Rica. 583 



In the female the dark shade from vein to apex is some- 

 what suffused with violaceous black. 



Ilab. Juan Vinas, Sixola, Tuis, Guapiles. 



Rifargia nebulosa, sp. n. 



<$ . Body grey above, white underneath ; a reddish-brown 

 shade posteriorly on collar. Fore wings grey, palest in 

 discal area and thinly irrorated with brown ; a black basal 

 line, angled on subcostal, followed by a brown spot on costal 

 margin; a fine dark geminate antemedial line, wavy, in- 

 dentate on submedian ; a large, linear, irregularly lunular 

 spot at end of cell ; the postmedial geminate, lunular, dark 

 brown, curved beyond cell, followed by broad brown shadings, 

 especially towards costa and apex ; a dark marginal wavy 

 line and dark brown streaks on veins beyond postmedial. 

 Hind wings white ; a dark grey shade on inner margin ; the 

 outer margin narrowly grey. Underneath white; dark 

 streaks on veins towards apex of fore wings. 



Expanse, £ 36 mm. 



$ . More uniformly grey, with brown costal spot near 

 base ; the subapical shadings more reddish brown ; the hind 

 wings more greyish, with the veins on outer margin more 

 heavily marked with grey. 



Expanse 41 mm. 



Hab. Avangarez. 



Another female from the same locality has both wings 

 smoky grey ; the fore wings darker, with faint traces of the 

 discal spot and subterminal brown shadings; the marginal 

 line is alone distinct. 



Expanse 44 mm. 



A female from Tuis has the body above and fore wings 

 black, some white at base of antennas ; the end of cell and 

 space beyond to subterminal shade white, from veins 2—7 

 crossed by a blackish shade in end of cell and between 4 

 and 6; the hind wings are white, the veins terminally and 

 margins narrowly black. 



Expanse 44 mm. 



This last form may be a distinct species, for which I 

 propose the name of medioclara. 



R. nebulosa is allied to R.felderi, Schs., and R. bichorda, 

 Hamps. 



Naprepa flexifera, sp. n. 



Head and thorax dark violaceous brown, irrorated with 

 black and buffish-grey scales, the latter on tips of thoracic 



