668 MR. A. G. BUTLER ON SIX NEW BUTTERFLIES. [Nov. 14, 
very distinct ; we have, however, a variety of 1. irmina that is almost 
identical with it in the colour and markings of the upperside, al- 
though very different beneath. 
Fig. 1. Heterochroa salmoneus. 
2. H. boreas. 
3. H. sicheus. 
2. HeTrrRocHroa BoREAS. (Fig. 2.) 
Upperside—front wings rich brown, crossed beyond the middle 
by a broad oblique dull orange band; the two extremities curved, 
the upper end, which touches the anterior margin, outwardly, the 
lower and smaller end, at the anal angle, inwardly; the outer edge 
produced just before the middle, forming two irregular sinuations ; 
a row of three orange spots between the nervures connecting this 
projection with the anterior margin near the apex, the lowest spots 
very minute ; cell crossed by five oblique black lines, the two central 
ones continued below the median nervure and meeting each other ; 
two indistinct, converging, submarginal black lines along the outer 
margin near the apex. Posterior wings rich brown, crossed by a 
paler brown band just beyond the middle, broad at the anterior mar- 
gin, and gradually tapering towards the anal angle; outer margin 
pale, intersected by two submarginal darker bands. 
Underside—front wings deep reddish brown, paler towards the 
outer margin; central band similar to that of the upperside, but 
roseate white, and interrupted by the nervures, which are red-brown, 
and by a faint brown streak intersecting the band between the upper 
disco-cellular and the second median nervules ; a row of three white 
spots, the two upper ones tinged with roseate, the lower one with 
blue, meeting the projection of the central band, and connecting it 
with the anterior margin near the apex; the second spot divided 
into two, the third into three, by central brown lines; two dark 
