I 
60 AECTIID^. 
thorax. Primaries below dark brown ; two spots in the cell and an arched series beyond it 
whitish : secondaries as above. Body dark brown ; proximal end of trochanters orange. 
Expanse of wings 1 inch 8 lines. 
Para (Smith). 
Eucereon marmoratum, n. sp. (Plate XVI. fig. 4.) 
General aspect of E. setosa. Primaries whity brown, becoming slightly darker towards 
apex ; veins black-brown ; two central dentate-sinuate lines, opposed to each other and 
diverging towards the costa, partially obscured by a large diffused V-shaped marking across 
the end of the cell ; an interno-median basal streak and a series of discal hastate markings 
black-brown ; two bifid whitish subapical spots, placed obliquely : secondaries hyaline white, 
with a bi'oad black border. Head and thorax pale brown ; frons, antennae, margins of 
thorax, collar and tegulse, and a central line, black -brown ; back of head ochreous ; metathorax 
yellowish behind ; abdomen black-brown, shot with blue, the sides and three subterminal 
segments ochreous. Primaries below brown, a spot near the end of the cell and two subapical, 
as above, white. Body dark bi'own ; pectus with lateral whitish tufts ; collar, trochanters, 
and a large patch at base of venter ochraceous ; proximal end of hind femora and distal end 
of tibije white. Expanse of wings 1 inch 8 lines. 
" Pupunhazinho," Rio Jurua; taken November 8, 1874 (/. W. H. Trail). 
P. marmoratum seems to be a common species. Mr. Trail took it in the following addi- 
tional localities : — Imla, below the Rapids of Porteira, Rio Trombetas, March 1 ; Rio Negro, 
June 14 j at Ayrao, July 3; near Amman, Rio Purus, September 5 ; Guajara, September 6 
and 7 ; Pedroso, September 25 ; Maraiva, September 28 ; Mabidiry, September 30; Mouth 
of Rio Sapo, October 13 ; Curimata, Rio Jurua, October 30 ; Pupunha, November 1 and 5. 
Eucereon complicatum, n. sp. (Plate XVI. fig. 12.) 
Nearly allied to E. marmoratum, but the wings paler, and the central transverse lines of 
primaries approaching each other at both extremities ; nearly the whole of the venter creamy 
ochreous. Expanse of wings 1 inch 9 lines. 
Rio Jurua, October 26, 1874 (/. W. H. Trail). 
Eucereon reticulatum, n. sp. (Plate XVII. fig. 9.) 
Primaries, head, and thorax dark brown, reticulated with pale greyish brown or, more 
strictly speaking, pale greyish brown covered with dark brown spots : costal area of primaries 
pale brown, interrupted at equal distances by blackish spots ; outer border pale brown, with 
a row of submarginal black spots ; a white dot in the cell, two beyond it, one on interno- 
median area, and one (cut by the second median branch) on outer border : secondaries dark 
brown, outer border blackish : abdomen deep rose-red, anal segment black tipped with white. 
Wings below dark brown ; primaries with a small spot in the cell, a bifid spot beyond it, 
another on outer margin, the fringe at apical and external angles, white ; pectus sordid 
