316 Mr. H. W. Bates on the Nymphalinz 
genera have one or more of the nervures similarly swollen. The 
enlarged apical joint of the palpi in the males and the simple style 
of coloration are the distinguishing characters of the genus. I think 
its true place is in the neighbourhood of Ageronia. 
83. Didonis Biblis, Fab. 
Papilio Biblis, Faby. Syst. Ent. p. 505, n. 261. 
Hyperia, Cramer, 236 £, F. 
This species offers slight variations according to locality; but the 
form which I met with abundantly on the Upper Amazons, at Ega, 
agrees with the type found at Surinam, as figured by Cramer in the 
place quoted. The insect flies about waste grounds on the borders of 
the forest, hovering moderately slowly over bushes. 
Genus Otra (Dbldy.), Westw. in D. & H. Gen. p. 407. 
This genus was placed by Westwood, with the preceding, in the 
family Eurytelide. Its true position, notwithstanding the elongated 
wings and the wholly different style of coloration, is next to Didons, 
with which it agrees in neuration and shape of antenne. The 
species fly low, and hover about over the herbage with expanded 
wings, in the manner of most Nymphalide. They live habitually in 
the forest. I think there can be no doubt of the near relationship of 
this and the following genus to Pyrrhogyra, Victorina, and Eubagis. 
84. Olina Mariana, n. sp. 
do. Expanse 2” 8’, Similar in size and shape to O. Azeca (Doubld. & 
Hewits. Gen. pl. 31. f. 3). Above, black: fore wing with a short basal 
ereyish-white streak, a broad, much broken, white belt across the middle, 
a narrow macular white belt towards the apex, a grey streak nearer the 
apex, and two grey spots close to the hind angle; the central white belt 
begins at the subcostal nervure and ends a considerable distance from the 
outer border, its upper part is detached from the rest and forms a large 
spot within the end of the cell. The hind wing has a short submarginal 
row of greyish-white spots, and a continuous fine line, of the same hue, 
nearer the outer border; the outer margin is dentate, the projections being 
very obtuse, and the sinuses edged with white. Beneath, brownish black, 
the fore wing having the same spots as above, but larger: the hind wing 
has an orange-tawny streak, commencing at the base, running, near to the 
costal nervure, round the apex, and terminating in a large patch at the 
anal angle; the disk has a bluish streak surrounded with brown, the outer 
margin has two rows of elongated spots, the inner one being bluish and 
the outer ashy white. Body, above, black; thorax with two transverse 
erey streaks, collar spotted with grey. Antenne black; palpi underneath 
and breast whitish. 
