70 Mr. A. G. Butler on the 



Olceclostera, n. gen. 



Allied to Ichthyia-a, but the abdomen very slender; the 

 primaries with straight outer margin, angulated and ex- 

 cised below apex; secondaries with considerably longer 

 inner margin ; outer margin angulated at submedian vein ; 

 antennffe tolerably long and well pectinated ; palpi thick, 

 compressed, with extremely short terminal joint; tibiae 

 clothed with long compressed hair ; a well-defined anal 

 scale-tuft to the abdomen. Type, O. irrorata. 



122. Olceclostera irrorata, n. sp. 



Upper surface ferruginous brown ; primaries much 

 darker than secondaries, the basal area irrorated with 

 whitish scales ; two chocolate-brown oblique central lines, 

 elbowed towards the costal margin ; discocellulars trans- 

 verse, black ; veins on the disc whitish ; a disco-submar- 

 ginal chocolate-brown line, oblique to upper radial inter- 

 space, where it joins a golden spot, thence to the inner 

 margin it is sinuated ; secondaries with the abdominal 

 area dusky, the discocellulars, two discal lines and the 

 outer margin dusky; thorax much darker than the abdo- 

 men, irrorated with whitish scales; wings below paler 

 and redder than above, the costal areas of all the Avings 

 irrorated with white scales ; two dusky parallel discal 

 lines; secondaries with the veins and abdominal area 

 irrorated with whitish scales ; body below irrorated with 

 whitish ; legs clothed with brown hair ; venter with a 

 series of white dots on each side : expanse 1 inch 5 lines. 



Boa vista, Rio Jutahi, 1st February, 1875. 



Orthoclostera, n. gen. 



Allied to Ichthyura and the preceding genus, differs 

 from both in its narrow primaries, with straight (or nearly 

 straight) margins, antennte with long pectinations for 

 nearly two-thirds of their length ; and from the former it 

 differs also in the absence of a defined anal tuft to the 

 abdomen. Type, O. peculiaris. 



123. Orthoclostera peculiaris, n. sp. 



Primaries above purplish-brown, with an interno-basal 

 brownish patch followed by a central whity-brownish band 



