140 HETEROCERA. 
1. Zerene orsona, sp. n. (Tab. LIV. fig. 11,2 .) 
Male. Primaries and secondaries creamy-white, the costal margin of the primaries black near the base, each 
wing crossed beyond the middle by a row of minute black dots and with a small black dot at the end of 
the cell, the outer margins with black points, the fringe white; the underside as above: head and tegule 
orange-yellow, the thorax and abdomen yellowish-white, the antenne yellowish, the legs pale brown. 
Expanse 1? inch. 
Hab. Mexico, Durango city (Becker), Milpas in Durango 5000 feet (forrer). 
This species resembles the European Orthostixis letata (Fabr.). 
SCORIA. 
Scoria, Stephens, Illustr. Brit. Ent. i. p. 244 (1831); Herrich-Schiffer, Samml. ausseureur. 
Schmett. p. 48; Walker, Cat. xxiv. p. 1050. 
This genus is represented in our region by one species, which slightly resembles the 
European S. dealbata (Linn.). 
1. Scoria selectata. (Tab. LIV. fig. 12, 6.) 
Scoria selectata, Guen. Sp. gén. des Lép. x. p. 163"; Walk. Cat. xxiv. p. 1051”. 
Hab. Mexico, Jalisco (Schumann).—Co.omBia? °. 
‘Two specimens, male and female. 
FULGURODES. 
Fulgurodes, Guenée, Sp. gén. des Lép. x. p. 213 (1857); Walker, Cat. xxiv. p. 1131. 
1. Fulgurodes organa, sp. n. (Nipterta organa, Tab. LIV. fig. 13, 2 .) 
Female. Primaries and secondaries greyish-white, clouded with pale brown; the primaries with three white 
streaks on the costal margin—the two nearest the base quite short, the third longer and faintly continued 
across the wing nearly to the anal angle; the secondaries with several indistinct brown marks about the 
middle, the outer margin broadly bordered with very pale brown, a submarginal waved greyish-white line 
extending from near the apex to the inner margin; the fringe alternately pale brown and greyish-white ; 
the underside very much as above, but with all the markings darker and more distinct: antenne black ; 
palpi white, with the third joint, and part of the second also, black; the front of the head yellow, the 
collar, thorax, and tegule pale brown; the abdomen with the two basal segments greyish-white, the 
others brownish-yellow, each segment edged with a black line, the underside whitish; the legs brown. 
Expanse 23 inches. 
Hab. Mexico, Coatepec (Brooks). 
One specimen. FF. organa is very distinct from any other species known to me. 
NIPTERIA. 
Nipteria, Guenée, Sp. gén. des Lép. x. p. 223 (1857) ; Walker, Cat. xxiv. p. 1137. 
A Tropical American genus, three species of which occur within our limits. 
1. Nipteria ordga, sp.n. (Tab. LIV. figg. 14, 15, 9 .) 
Female. Primaries and secondaries pale whitish-brown, the primaries with three indistinct lines of spots crossing 
