248 HETEROCERA. 
very much greener in colour when captured, but no doubt, like many other similarly 
coloured species of Heterocera, the colour very quickly fades or changes to a yellowish- 
brown. 
NYSTALEA. 
Nystalea, Guénée, Spécies général des Lép. vi. p. 122 (1852) ; Walker, Cat. xi. p. 633. 
Trigonophora, Hiibner, Verz. bek. Schmett. p. 217 (partim). 
Guénée included three species in this genus—W. conchyfera, from Saint Thomas, 
NV. superciliosa, from Cayenne, and WN. ebalea (Cramer), from Surinam; two of these 
extend into our country, whence I have also to record five other known species ; 
numerous others have been described by Guénée, Walker, and Felder. The genus is 
apparently confined to Tropical America and the Antilles. 
1. Nystalea ebalea. 
Phalena Noctua ebalea, Cram. Pap. Exot. iv. p. 41, t. 810. £. C}. 
Nystalea ebalea, Guén. Sp. Gén. Lep. vi. p. 123; Walk. Cat. xi. p. 6847. 
Hab. Nicaragua, Chontales (Belt); Panama, Volcan de Chiriqui (Ribbe, in mus. 
Staudinger ).—Gutana, Surinam ! 2, 
NV. conchyfera, Guénée, may be referable to this species, but Guénée’s and Cramer’s 
figures are very different. The Central-American specimens before me undoubtedly 
belong to WV. ebalea, Cramer; though they are not quite so dark in colour the markings 
are similar. 
2. Nystalea superciliosa. 
Nystalea superciliosa, Guén. Sp. Gén. Lep. vi. p. 123"; Walk. Cat. xi. p. 635”. 
Hab. Panama, Volcan de Chiriqui (Arcé, in mus. D.), Caldera in Chiriqui 1200 feet 
(Champion).—Guiana, Cayenne!2; Santo Domingo 2. 
This is the largest and most darkly-coloured species of the genus. 
8. Nystalea guttiplena. 
Nystalea guttiplena, Walk. Cat. xi. p. 635. 
Hab. Panama (fibbe, in mus. Staudinger), Volcan de Chiriqui (Zrétsch, in mus. Stau- 
dinger).—CoLomBIA, Bogota (mus. D.). 
This insect was described from an unknown lccality. 
4, Nystalea inchoans. 
Nystalea inchoans, Walk. Cat. xi. p. 686%. 
Hab. Panama, Volcan de Chiriqui (Ribée, in mus. Staudinger).— VEnEzvELa 1, 
A specimen from Chiriqui in Dr. Staudinger’s collection agrees well with Walker’s 
type of this species. 
