576 Mr. W. iSchaus on 



Expanse 60 mm. 



JIab. Juan Vinas. 



Allied to N. nyseus^ Cr., and guttulata, Sclis. 



Nystaha nyseus collaris, subsp. n. 



(J. Differs from iV. nyseus, Cr., in having the head and 

 collar dark velvety brown, almost black. 

 Expanse 57 mm. 

 Hah. Juan Vinas ; June. 



Pentohesa placida, sp. rs. 



Palpi and frons dark brown and buff. Vertex, collar, 

 thoraXj and abdomen buff-grey, the latter with transverse 

 darker bands. Fore wings greyish buff, irrorated with 

 violaceous-brown scales, especially in cell and along costal 

 margin ; a dark streak on inner margin from base to post- 

 medial ; a dark streak on discocellular ; the postmedial 

 punctiform, indistinct ; indistinct paired brown streaks 

 between veins from cell to outer margin ; a terminal row of 

 darker spots, preceded by fine daik lunular lines, very in- 

 distinct ; an oblique subterminal dark line above vein 3. 

 Hind wings whitish, the outer margin narrowly fuscous. 



Expanse, ^J 36 mm. 



The female is darker and more distinctly marked, the hind 

 wings more smoky white. * 



Expanse 43 mm. 



Hab. Juan Vinas, Guapiles, Tuis. 



Marthula riifescens, sp. n. 



(^ . Palpi, head, and collar brown. Thorax deep velvety 

 reddish brcwn, the patagiaj lilacine. Abdomen above dull 

 grey-brown, sublateral black tufts on last two segments. 

 Fore wings brown shaded with lilacine at base, on inner 

 margin, medially in and below cell, and on outer margin 

 below vein 3 ; costal margin medially broadly shaded w'ith 

 reddish ; lines shaded with lilacine ; the subbasal inset on 

 costa, geminate from median to submedian ; the antemedial 

 and postmedial geminate, hardly visible on costa ; the sub- 

 terminal nearly straight ; a large linear spot at end of cell ; 

 marginal dark spots between the veins. Hind wings brown. 



Expanse, ^ 35 mm. 



$ . The collar dark brown. The wings more uniformly 

 lilacine brown j no reddish shade on costa. Hind wings 

 iuscous brown. Underneath : the fore wings are brown, the 



