Col. C. Swinhoe on new Geometers. 151 
it should have been sanguinaria, Moore, with the same refer- 
ence; the description of the genus and the woodcut were both 
taken from the latter species. 
Genus Ipma, Treit. 
Idea peralba. 
3 2. White glistening ; a black dot at end of cell in all 
the wings, black dots on the outer margins. Wings covered 
with very minute grey irrorations ; costa of fore wings grey, 
five transverse grey bands, first before the middle and out- 
wardly curved, second medial and sinuous, third, fourth, and 
fifth close together, the fifth being marginal, and all sinuous. 
Hind wings with four bands, the first before the middle in 
continuation of the second band of the fore wings, second, 
third, and fourth at even distances corresponding to the third, 
fourth, and fifth of fore wings ; fringe long, pure white. 
E:xpanse of wings 1 inch. 
Type: Fort Stedman, Shan States. In B.M. 
Genus DEFoA, nov. 
3d. Fore wings with the costa slightly arched before the 
apex, outer margin rounded, inner margin straight, four fifths 
the length of the costa. Allied to the genus Somatina (type 
anthophilata, Guen.). Hind wing with vein 7 emitted at end 
of cell, instead of before it, as in that genus; mid tibiz 
with two spurs; hind tibia greatly incrassated, a tuft of long 
hairs from the upper end; hind tarsi obsolete, there being 
merely a small point at the end of the tibia. 
Defoa ustata. 
3. Dark olive-grey, patched and suffused with chestnut- 
brown. Fore wings with a white lunular mark at the end of 
the cell, margined with brown, a large chestnut-brown patch 
covering nearly the whole discal space, extending from inner 
margin nearly to the costa, where it is rounded and margined 
with dark brown. Hind wings with a similar-coloured but 
much paler patch, which extends nearly evenly from the 
abdominal margin to the costa, is striated with black, covers 
more than half the wing-space, and has a sinuous outer margin 
near the outer margin of the wing; a small white cell-dot 
with a brown margin, and marginal lunules to both wings 
brown. Underside of a uniform pale brownish grey, with 
black suffusion on lower half of fore wing and costal space of 
