10 BULLETIN 18, UNITED STATES NATIONAL MUSEUM. 



Clii/folita liiis tlie male aiiteiiiia' bristled, and lias at basal third a 

 nodosity, coverinj;' three enlari;ed joints, which are furnished with cor- 

 neous processes. The male fore legs are prominently tui'ted, but abor- 

 tion is not carried so far as in the preceding genvis, which it follows 

 naturally. 



Bleptiua and TetanoJita should follow the preceding in a natural 

 arrangement. 



Hypennla is a curiously dark form which at hrst sight suggests the 

 tribe Hypenini, but has the wing form of the i^resent series, an.d, as 

 well, the tufting of the male fore legs, which, however, is not prominent. 

 The male antenuie are laterally bristled, but have no special moditi 

 cation. In a natural sequence this genus should come after Renia. 



Dercetis is a genus with curious little species in which the male 

 antenna; are pectinated, the branches proportionately very stout, the 

 male fore legs tufted, ami the primaries broad, trigonate, the outer 

 margin angulated at middle ami excavated below the a|)ex. It sh(uild 

 be associated with (rahrrdtia and Ptdthis, from which it differs by the 

 presence of the accessory cell. 



Reniaisii genus comi)()sed of large species in which the apices of 

 the primaries are usually somewhat marked. The lack of accessory cell 

 will distinguish it at once from all the other genera of larger insects in 

 which the Mings are not angulated. The male antenna' are peculiar in 

 the presence of a pointed tuft of hair toward the middle, covering a 

 distinct bend or curve, and beyond which the stem is much more slender 

 and inclined to curl. They are laterally bristled, and the structure is 

 uniciue. The tuftings of the male fore legs are practically obsolete, and 

 the anterior tibial process is much reduced. The genns should follow 

 Bk'pthui, and should be in turn followed by Hypcmda^ though this 

 affords strong leanings toward the Zanvlognatha type. 



HeterofjrammH has tlie fore wings angulated, the male anteniue later- 

 ally bristled. The fore legs of the male have a large tibial process 

 covering a mass of large scales, but forming no distinct tufts. At the 

 base of the long lirst tarsal joint is a peculiar ladle-shaped appendage, 

 which has been previously mentioned. The genus follows naturally 

 after Hj/penuhi, and is easy of recognition by the characters given. 



Gahcrasa resembles Heterogvamma in the female and in all the fea- 

 tures of the male, save that the ])riinaries in that sex are cleft for 

 nearly one-third of their distance from the margin, making a distinc- 

 tive and unique feature in our ])eltoid fauna. 



Falthis is a remarkable little genus. The fore wings are narrow, 

 pointed, the outer margin angulated and very obliciue. The antenn;e 

 of the male are laterally bristled and not s])ecially moditied. The palpi 

 in that sex are peculiar m the development of a long membranous 

 appendage to the third joint, extending back to the base of the thorax, 

 and to this appendage is attached a tuft or pencil of hair, capable of 

 expansion, similar to the tuftings on the fore legs in other genera. 



