258 MR. A. G. BUTLER ON NEW [ Mar. 16, 
A third variety is golden yellow, with the tubercles and lateral 
stripes paler yellow ; the segments, excepting the anterior ones, with 
lateral pectinated subtriangular crimson-lake patches, bounded in- 
ternally by the lateral oblique lines, and a reddish diffused spot in 
front of the tubercles: this is the most beautiful variety. 
Mr. Lewis found the species feeding upon plum and cherry. 
Subfamily SpHinGinz. 
Genus Isocnatuus, Felder. 
50. IsoGNATHUS FUMOSA, N. Sp. 
Dark brownish grey ; primaries marked, much as in the preceding 
species, with brown lines and dots, a long oblique blackish streak 
beginning within cell and running into second median interspace ; 
secondaries orange-yellow, with a broad chocolate-brown outer border 
(10 millimetres wide), deeply excavated on abdominal margin, and 
streaked with three whitish lituree at anal angle: body brownish 
grey, thorax indistinctly varied with darker brown ; abdomen fasciated 
with dark-brown bars, interrupted in the middle: below smoky 
brown, disk of wings crossed by a darker streak, blackish on the 
nervures ; secondaries with the costal area greyish, a large subtri- 
angular orange patch from abdominal margin to centre of discoidal 
cell and corresponding disk. Expanse of wings 3 inches 11 lines. 
Brazil (Stevens). Type, B.M. 
Possibly the female of Sphinx leachii, but with a much wider 
black border to secondaries. 
51. IsogNATHUS METASCYRON, N. sp. 
Allied to D. scyron; pinkish brown above, irregularly clouded 
and spotted with black, the nervures on disk spotted with alternate 
black and clay-coloured strigule and dots, internal half of wing 
dusky ; secondaries orange-yellow, with a rather broad black border 
(4 millimetres) to outer margin, not reaching abdominal margin : 
body uniformly pinkish brown; collar, a streak on pterygodes, a 
lateral abdominal series of bars, and two central longitudinal lines 
dark brown; wings below nearly as in preceding species, but the 
orange patch of secondaries much larger and crossed above middle 
of wing by blackish nervures. Expanse of wings 4 inches. 
Villa Nova (Bates). Type, B.M. 
I found this species mixed up with I. fasciata. It seems chiefly 
to differ from JI. scyron in its greater size and the much narrower 
black border of secondaries, and from J. swainsonii in the latter 
character. 
Genus DitorpHonota, Burmeister. 
52. DILOPHONOTA DOMINGONIS, h. sp. 
é. Exceedingly like D. obscura 3, but broader in wing; the 
primaries much whiter, with the streaks and spots showing dark 
upon them ; the discocellular area quite white, enclosing a black dot ; 
secondaries redder ; thorax darker; abdomen rather greyer, central 
