444 HETEROCERA. 
1. Rivula orobena, sp. n. (Tab. XXXVI. fig. 8.) 
Primaries pale fawn-colour, a spot at the end of the cell, a streak from this to the apex, and the outer margin 
shaded with darker brown; secondaries blackish-brown, paler at the base and along the costal margin; 
the fringe of both wings brown: head, palpi, thorax, and abdomen fawn-colour, the abdomen becoming 
brown near the anus; antenne and legs brownish-fawn-colour. Expanse 1 inch. 
Hab. Panama, Chiriqui (Ribbe, in mus. Staudinger), Volcan de Chiriqui 2000 to 
3000 feet (Champion). 
I have only seen three specimens of this insect ; it is allied to R. sericealis. 
2. Rivula mandaune, sp. n. (Tab. XXXVI. fig. 4.) 
Primaries very pale fawn-colour, with a large black spot on the middle of the costal margin, beyond which the 
Wing is crossed from the costal to the middle of the inner margin by a pale brown line (this being paler 
on the outer side), a fainter second submarginal waved line extending from the apex to the anal angle, 
and between the two lines a row of very minute black elongated points, the outer margin of the wing 
dusky ; secondaries uniform pale greyish-brown: head, thorax, and abdomen pale fawn-colour. Expanse 
1 inch. 
Hab. Mexico, Coatepec (coll. Schaus). 
The specimen kindly lent us by Mr. Schaus is the only one I have seen of this 
insect. 
SASERNA, gen. nov. 
Male. Head and thorax rather broad; the abdomen slender, with the anal tuft long but not extending beyond 
the wings. Eyes large. Palpi long, slender; the third joint rather flattened. Antenne about half the 
length of the primaries, very slightly pectinated. Legs long and slender. The primaries broad, much 
rounded at the anal angle, the costal margin straight, the apex pointed; the secondaries broad, very 
much rounded from the apex to the anal angle, the inner margin straight. 
Type Hypena scissilinea, Walker. 
This genus is allied to Menecina, Walk. 
1. Saserna scissilinea. (Tab. XXXVI. fig. 9,3.) 
Hypena (?) scissilinea, Walk. Trans. Ent. Soc. Lond. 3rd ser. i. p. 261°. 
Hab. Costa Rica, Cache (Rogers).—Brazit, Rio Janeiro 1. 
This species was described by Walker from a specimen in Mr. Fry’s collection. The 
type is now in the Oxford Museum ; our Costa-Rican example agrees perfectly with it. 
2. Saserna lyde, sp.n. (Tab. XXXVI. figg. 10,¢; 11,9.) 
Male, Primaries and secondaries dull brown, with a slight greyish tinge, a large oval black spot on the 
primaries at the end of the cell, from which a dark line extends to the costal margin, a faint, very narrow, 
yellowish-brown line crossing both wings beyond the middle, the primaries with a very indistinct submar- 
ginal waved band of dark blackish-brown spots extending from the apex to the anal angle; the underside 
paler in colour, with the markings all very indistinct: head, palpi, antenne, thorax, abdomen, and legs 
dark brown. 
Female, Primaries and secondaries pale brownish-fawn-colour, almost cream-colour on the costal margin near 
the apex, both wings irrorated with minute black dots, and crossed by a faint line, which is broken into 
spots: head and front of the thorax dark brown, the rest of the thorax, the tegule, abdomen, and legs 
pale fawn-colour. Expanse, ¢ 1}, 9 13 inch. 
