Heterocera from Costa Rica. 15 



crossed by an irregular, geminate, fuscous sliade, more 

 heavilv marked at vein H, hclow 4, and on inner margin ; 

 apex fuscous ; a fuscous terminal line. Hind wings fuscous; 

 tlie postmedial line more heavily marked, geminate between 

 veins 5 and 2 and on inner margin; an indistinct darker 

 8ul)terminal shade. Hind wings below paler ; a black discal 

 spot ; the postmedial line single. 



Expanse 31 mm. 



Hah. Tuis. 



Thxirsania phoJoe, sp. n. 



(J . Palpi brown irrorated with butT. Head, collar, and 

 thorax brownish grey. Abdomen fuscous grey. Fore wings 

 brownish grey ; a velvety brown-black subbasal streak to 

 median ; a similar antemedial fascia across costa and cell, 

 expanding into a large spot between median and submedian ; 

 two similar superposed spots at end of cell, partly edged with 

 "whitish buff, closely followed by the dentate postmedial line ; 

 a subterminal narrow fuscous shade, outangled just above 

 vein 6 and on vein 4 ; terminal fuscous spots on interspaces. 

 Hind wings fuscous ; a faint discal spot, straight postmedial 

 shade, and curved subterminal line. Wings below fuscous 

 grey; dark discal spots and postmedial line. Hind wings 

 rather paler ; a subterminal shade, more heavily marked at 

 anal angle. 



Expanse 27 mm. 



Ilab. Turrialba. 



Thursania dissona, sp. n. 



? . Palpi upcurved, second joint smoothly scaled, with 

 tuft above near middle, third joint tufted at middle above, 

 leaving the tip naked, acuminate, lilacine brown irrorated 

 with dull brown, the tufts mottled with black. Head, collar, 

 thorax, and fore wings light brown faintly tinged with 

 lilacine. Abdomen paler at base, irrorated with purplish 

 brown terminally. Fore wings: lines indistinct, consisting 

 of dark irrorations ; antemedial outangled in cell, outbent on 

 inner margin ; traces of a medial line crossing the reniform, 

 which is itidistinct, orange-brown; postmedial vertical to 

 vein 2, then slightly incurved; a subterminal, sinuous, dark 

 brown shade, divided b}' a faint light brown line; the apex 

 shaded with fuscous ; an interrupted terminal dark brown 

 line. Hind wings dark grey, the space from veins 2 to 4 

 buff irrorated with brown ; a postmedial fine dark line, vertical 

 to just below vein 2, angled and inbent to inner margin ; the 



