THYSANIA.-—EREBUS. 370 
black ; the secondaries clouded with blackish-brown from the base to about the middle, and crossed from 
the costal to the inner margin by three very indistinct brown zigzag lines, below which are bands of 
black lunular-shaped markings, and between these latter a wide dark slate-coloured band extending from 
the costal to the inner margin and a submarginal row of black markings; the underside pale ochreous- 
yellow, with five zigzag black bands crossing both wings, the fourth band from the base being the widest : 
head, thorax,and abdomen dark blackish-brown above, pale ochreous beneath, the legs pale ochreous, 
the antenne and palpi dark brown. Expanse 5} inches. 
Hab. Costa Rica (Van Patten). 
Allied to 7. zenobia (Cram.), from which it may be at once distinguished by the 
entirely different colour of both the upper and undersides. One specimen only has 
been received. 
3. Thysania agrippina. 
Phalena Noctua agrippina, Cram. Pap. Exot. i. p. 136, t. 87. f. A, and p. 138, t. 88. f. A’. 
Thysania agrippina, Guén. Sp. gén. des Lép. vii. p. 1647; Walk. Cat. xiv. p.1287°; Moéschl. Verh. 
zool.-bot. Ges. Wien, 1880, p. 429°; Beitr. zur Schmett.-Fauna von Surinam, iii. p. 51°. 
Noctua striz, Fabr. Sp. Ins. ii. p. 209; Mant. Ins. ii. p. 135. | 
Phalena Noctua striz, Gmel. ed. Syst. Nat. 1. 5, p. 2529, 
Syrnia striz, Hiibn. Samml. exot. Schmett. 11. tabb. 207, 208. 
See also: Merian, Surin. Ins. p. 15, t. 20; Seba, Mus. iv. t. 39. ff. 12, 14, and t. 57. ff. 7, 9. 
Hab. Mexico, Jalapa (Schaus) ; GuateMa.a, in the city (Rodriguez), San Gerdnimo 
(Champion); Nicaragua, Chontales (Belt); Costa Rica (Van Patten) ; Panama, Bugaba 
800-1500 feet, Volcan de Chiriqui 4000 feet (Champion), Chiriqui (Arcé; Ribbe, in 
mus. Staudinger).—Ecuapor, Sarayacu ; Guiana, Roraima, Surinam 1745; Brazin 3, 
This is the largest known species of the Noctuz: several of the specimens before me 
measure a little over twelve inches from tip to tip of the primaries. It varies consi- 
derably in colour, some examples being much darker than others, and also shaded with 
brown; others again are almost white, with the lines only black. The underside is 
more or less shot with a rich dark blue colour. 
Mr. Champion informs me that this gigantic insect is common in the month of 
April on the tree-trunks in the dense forest about the Volcano of Chiriqui, at an 
elevation of 4000 feet. It rests with the wings horizontally extended. 
EREBUS. 
Erebus, Latreille, Consid. gén. class. Crust., Arachn. et Ins. p. 365 (1810) ; Guénée, Sp. gén. des 
Lép. vii. p. 166; Walker, Cat. xiv. p. 1289; Grote, List of North-American Moths, p. 42 
(1882). 
The single species belonging to this genus is one of the commonest forms of Noctue 
in Tropical America, and extends to the Antilles and also northwards to the United 
States. | 
