CALIGO. 131 
occur. In addition to the two sections of the genus represented in our fauna there is 
another, with densely hairy eyes, found in South America, which has not yet been 
detected within our border; this is represented by the Brazilian C. martia, and on our 
frontier by the Colombian C. oberthiiri. As will be seen below, the two sections of 
Caligo with smooth eyes, of which alone we have to treat here, have fairly good 
characters by which to distinguish them. 
Caligo has large rounded wings and a robust body; the prediscoidal cell of the 
secondaries is quite small ; there is in the male a denuded patch on the submedian 
nervure of the secondaries, with a small pencil of hairs in the middle on the inside of 
the nervure; the femur of the front legs of the male is about equal in length to the 
coxa, which is stout. The tegumen of the male has a lobe in the middle of the ventral 
edge on each side; the ventral edge of this is nearly straight and serrate, and at its 
proximal end bears a long spur directed outwards ; the harpagones are long and slender, 
strongly dentate on their upper edge, which is either a simple curve or bears a lobe 
strongly dentate in front. 
A. Secondary wings without fulvous buff; secondary sexual organs of the male with 
the dorsal edge of the harpagones simply dentate. 
a. Base of primaries bluish fuscous, margin not very distinctly darker. 
1. Caligo eurylochus. 
Papilo eurilochus, Cr. Pap. Ex. t. 33. f. A, t. 34. f A’. 
Caligo eurylochus, Butl. & Druce, P. Z. 8. 1874, p. 339°. 
Pavonia eurylochus, Boisd. Lép. Guat. p. 56°. 
Pavonia eurylochus, var. brasiliensis, Feld. Verh. z.-b. Ges. Wien, xii. p. 476°. 
Caligo galba, Deyr. Rev. Zool. 1874, tt. 6, 7°. 
Alis fuscis, marginibus late obscure nigricantibus; dimidio primariorum basali ceruleo vix tincto; posticarum 
parte basali viridescente ad marginem externum obscurum purpurascentiore; subtus omnino marmoratis, 
anticis ad apicem ocello unico, posticis tribus ornatis, horum uno ad coste medium, altero maximo ultra 
cellulam super ramos medianos, altero inconspicuo ultra cellulam positis; inter duos maximos lineis 
paucis nigris, sed coloribus irroratis, haud interruptis. 
@ mari similis, sed major et primariis fasciis duabus submarginalibus obscure fulvis distinguenda. 
Hab. Guaremata’, Motagua valley (Ff. D. G. & O. S.), San Juan (Champion); Nica- 
raGcua, Chontales (Belt); Costa Rica (Van Patten”); Panama, Volcan de Chiriqui and 
Veraguas (Arcé).—CoLomBia; Guiana!; Braziu‘. 
We have some hesitation in placing Central-American specimens of this Caligo under 
the name of C. eurylochus; for, comparing our series with Guianan, Amazonian, and 
Brazilian specimens, we find that the outer margin of the primaries is usually darker 
than in the typical form, and the mottling of the undersurface is less evenly distributed, 
especially on the primaries; the secondaries, too, have a whiter ground near the base of 
the wing. These differences, however, are not quite constant enough to be available as 
s 2 
