28 HETEROCERA. 
10. Oxydia masthala, sp.n. (Tab. XLII. fig. 9, ¢-) 
Female. Primaries and secondaries reddish-fawn-colour, each crossed by a dark blackish-brown line; the 
primaries with two yellowish-white spots on the outer side of the line, the apex and part of the costal 
margin irrorated with black scales; the secondaries crossed from near the apex to the inner margin 
slightly above the anal angle by two very indistinct, waved, greyish lines; the underside darker than 
above, thickly irrorated with black scales, and with a blackish-brown line crossing both wings; the 
fringe dark yellowish-brown : head, thorax, and abdomen fawn-colour; the antenne pale yellowish- 
brown ; the legs fawn-colour, irrorated with black scales. Expanse 23 inches. 
Hab. Panama, Chiriqui (Zrétsch, in mus. Staudinger). 
One specimen. Allied to 0. platypterata, Guen.; but differs from all the examples 
of that species I have seen in having a blackish line on the underside crossing both 
wings. It is possible, however, that this insect may prove to be an extreme form of 
O. platyptera. 
11. Oxydia medona, sp.n. (Tab. XLII. figg. 15, 16, 2.) 
Female. Primaries and secondaries yellowish-fawn-colour ; the primaries with a greyish mark on the costal 
margin close to the apex, on the inner side of which is a small white spot, a minute black dot at the end 
of the cell, a dark waved line crossing from the costal to the inner margin between the small dot and the 
base, a dark brown line extending from near the apex to the middle of the inner margin, and a sub- 
marginal indistinct zigzag line crossing from the apex to the anal angle; the secondaries crossed. from 
the middle of the costal margin to below the middle of the inner margin by a dark brown line, and with 
a small black dot at the end of the cell and a submarginal row of rather indistinct brownish points, the 
latter partly connected by faint lines ; the fringe yellowish-fawn-colour, that on the inner margin of the 
secondaries white; the underside marked as above, but glossed with white, the submarginal lines more 
distinct and quite white : head, thorax, abdomen, antenne, and legs fawn-colour. Expanse 2,1, inches. 
Hab. GUATEMALA, Volcan de Atitlan 2500 feet (Champion). 
One female specimen. 0. medona is very distinct from all the species of Orydia 
known to me. 
12. Oxydia mundata, 
Oxydia mundata, Guen. Sp. gén. des Lép. ix. p. 57, Phalén. t. 10. f. 1°; Walk. Cat. xx. p. 51°. 
Hab. Panama, Volcan de Chiriqui 2000 feet (Champion).——BrRazIL 12, 
One specimen from Chiriqui, very nearly agreeing with Guenée’s figure. 
13. Oxydia artaxa, sp.n. (Tab. XLIII. figg. 12, 13, 6; 14, ¢.) 
Male. Primaries pale olive-brown, shaded with darker brown at the apex and along the outer margin, a 
narrow black double line extending from the apex to the middle of the inner margin, where on the outer 
side a short curved black line joins it and encloses a pale-coloured somewhat rounded spot, the disc of the 
wing thickly irrorated with silky-white scales, a curved black line crossing from the costal to the inner 
margin nearest the base, the fringe brown; secondaries yellowish-olive-brown, irrorated with whitish 
scales near the apex and along part of the outer margin, and crossed in the middle by a very faint line, 
the fringe yellowish-brown ; the underside of the primaries bright yellowish-fawn-colour, almost yellow 
near the apex, faintly streaked with fine brown lines, and crossed from the apex to the middle of the 
inner margin by a fine brown line, which is edged with white on the outer side—that of the secondaries 
paler in colour, clouded with brown near the apex, and crossed beyond the middle from the costal nearly 
to the outer margin, but not reaching it and here curved sharply inwards to the inner margin, by a 
