Heterocerafrom Costa Rica. 241 



brownish grey. Fore wings : costal margin brown, with a 

 silvery-white streak from base to middle of wing; a silvery- 

 white streak from base of cell to termen ; space below cell 

 and vein 5 pale brown, becoming whitish on inner margin 

 and termen ; a fine fuscous-brown streak below cell from 

 base to postmedial space and similar short streaks between 

 veins 2 to 4 ; terminal black spots, obsolescent towards apex; 

 cilia silvery white. Hind wings silvery white. 



Expanse 23 mm. 



Hah. Poas. 



Crambus pavi'dellus, sp. n. 



? . Palpi dark brown, mottled above with dull lilacine. 

 Head dull lilacine brown. Body dark greyish brown. Fore 

 wings : basal half of costa and cell anterioily brown ; below 

 it a white streak from base expanding at end of cell ; a fine 

 black line along median to vein 2 ; inner margin laroadly 

 greyish white, suflfused with brown basally below cell ; a 

 deeply outcurved dark antemedial line below submedian; a 

 postmedial dark brown line, outangled beyond cell, preceded 

 irom costa to vein 5 by a tine whitish shade, black from 

 angle to black line on median, iuangled below middle of cell, 

 outangled on inner margin, parallel with antemedial line ; 

 space beyond this line greyish white on interspaces, the veins 

 dark grey or brown to fuscous shading preceding subterminal 

 line, this shading narrow on inner margin ; subterminal fine, 

 whitish, outcurved on costa, inbent on inner margin, followed 

 by a brown line and some whitish spots on interspaces ; 

 termen brown, with black spots not reaching apex ; a sub- 

 apical greyish-white line ; cilia dark silvery grey. Hind 

 wings fuscous grey, darkest on termen; the base, a streak 

 through cell, and broad shade near inner margin whitish. 



Expanse 16 mm. 



Bab. Poas. 



Crambus retusellus, sp. n. 



cJ. Palpi, head, and thorax grey-white, the collar faintly 

 tinged with brown. Abdomen pale grey, with darker seg- 

 mental shades. Fore wings white ; costal margin broadly 

 brown to beyond middle ; inner margin faintly tinged with 

 brown, and with scattered dark irrorations ; a postmedial 

 brown line outangled at vein 5, then obsolescent and only 

 marked on middle of inner margin ; subterminal line gemi- 

 nate, thick on costa and oblique, then vertical, the inner line 

 irregular, expanding at vein 5 and preceded by a fine black 



