342 PROCEEDINCIH OF THE NATIOXAL MUSEUM. vol. xxix. 



Genus PRIONOXYSTUS Grote. 

 PRIONOXYSTUS DUPLEX, new species. 



Bod}" blackish; primaries dark brown with a few darker reticula- 

 tions. Secondaries white, semihyaline; costa narrowly, inner margin 

 broadly dark brown; a fine terminal brown line. 



Expanse. — 25 mm. 



Habitat. — St. Laurent, French Guiana. 



Type.—C'At. No. 9019, U.S.N.M. 



Genus PHILANGLAUS Butler. 

 PHILANGLAUS SOBRANA, new species. 



Body lilacine brown; primaries reddish brown with slightly darker 

 reticulations. Secondaries pale In'own, darkest on margins. 

 Expanse. — 43 mm. 



Habitat. — Maroni River, Dutch Guiana. 

 Type.—C^t. No. 9020, U.S.N.M. 



Genus RAVIGIA Dyar. 

 RAVIGIA BASIPLAGA, new species. 



Body grey, darkest on collar; frons brown. Primaries grey with 

 darker lines and reticulations, chiefly on outer margin; a dark spot at 

 end of cell- a dark-brown shade from base below cell to inner margin 

 and almost reaching \"ein 2, from which it is separated by a white 

 shade. Secondaries whitish, the veins brown; transverse dark grey 

 streaks between the veins. 



Expanse. — 42 nun. 



Habitat. — Omai, British Guiana. 



Type.— C^it. No. 9021, U.S.N.M. 



Genus GIVIRA Walker. 

 GIVIRA TRIPLEX, new species. 



Head dark brown; collar and thorax whitish; abdomen dark brown, 

 slightly mottled with white. Primaries whitish grey, the costal and 

 inner margins and veins bufl'; the base, inner margin to near vein 2 

 and costal margin for two-thirds from base irregularly irrorated with 

 dark brown; a dark curved shade around end of cell; blackish irrora- 

 tions between veins 3 and 5; terminal dark brown spots at ends of 

 veins, the largest toward inner angle. Secondaries greyish brown. 



Expanse. — 27 mm. 



Habitat. — St. Jean, French Guiana. 



Type.—Q^t. No. 9022, U.S.N.M. 



