374 HETEROCERA. 
Hab. Guatemata, Zapote, Pantaleon 1700 feet (Champion); Panama, Volcan de 
Chiriqui 2000 to 3000 feet (Champion).— VENEZUELA? ; Gutana, Surinam ?4; Brazii??. 
This species varies slightly; in some of the specimens before us the white spots 
on the secondaries are almost obsolete, in others they are very distinct ; none of them 
show any indication of the yellow colour represented on Hiibner’s figure. 
THYSANIA. 
Thysania, Dalman, Kongl. Vet.-Acad. Handl. 1824, p. 407; Guénée, Sp. gén. des Lép. vii. p. 163; 
Walker, Cat. xiv. p. 1286. 
This genus includes the largest known Noctue. Two of its species are very widely 
distributed, and found not uncommonly all over the tropical regions of America, one of 
them also extending to the West-Indian Islands; the third, which is here described, 
is known to me as yet only from Costa Rica. 
1. Thysania zenobia. 
Phalena Attacus zenobia, Cram. Pap. Exot. ii. p. 27, t. 115. ff. A, B’. 
Phalena Bombyx zenobia, Drury, Il. Exot. Ins. iii. p. 54, t. 39. 
Noctua zenobia, Fabr. Sp. Ins. 11. p. 209; Mant. Ins. ii. p. 185; Ent. Syst. iii. p. 28. 
Phalena Noctua zenobia, Gmel. ed. Syst. Nat. i. 5, p. 2529. 
Syrnia zenobia, Hiibn. Verz. bek. Schmett. p. 273. 
Thysania zenobia, Guén. Sp. gén. des Lép. vii. p. 1637; Walk. Cat. xiv. p. 1287°; Herr.-Schaff. 
Corr.-Blatt zool.-min. Ver. Regensb. 1868, p. 192 (sep. copy, p. 80)*; Butler, P. Z. S. 1878, 
p. 488°; Méschl. Verh. zool.-bot. Ges. Wien, 1880, p. 49°; Beitr. zur Schmett.-Fauna von 
Surinam, ili. p. 517; Grote, List of North-American Moths, p. 42 (1882) °. 
Hab. Norto America §.—MeExico%, Coatepec (Brooks), Cordova (Riimeli), Jalapa 
(Schaus), Omealca near Orizaba (MM. Trujillo), Valladolid in Yucatan (Gaumer); Guate- 
MALA, in the city( Rodriguez); Nicaracua, Chontales (Belt); Costa Rica (Gabb, in mus. D.); 
PanaMA, Bugaba, David (Champion).—CotomBia, Manaure; GutAna2, Surinam !367; 
Brazit?*, Santa Catarina; Trinipap; AnvILLEs, San Domingo3, Jamaica 25, Cuba 4. 
This species appears to be not uncommon in Central America. It varies a little in 
coloration, some specimens being much more heavily marked than others; freshly 
emerged individuals are of a beautiful pink colour on the underside. The insect was 
described and figured by Drury from a Jamaica specimen. 
Examples of this species, and of 7. agrippina also, have recently been captured by 
Sefor Rodriguez at the electric light in the city of Guatemala. 
2. Thysania tiasa, sp.n. (Tab. XXXII. fig. 10.) 
Primaries and secondaries ochraceous-brown; the primaries clouded on the costal, outer, and inner margins 
with dark blackish-brown, and crossed from the costal to the inner margin by numerous indistinct waved 
lines (those nearest the base the widest), and with a submarginal row of lunular-shaped black marks 
extending from the apex to the anal angle, the orbicular and reniform spots dark brown edged with 
