986 
RHUDA. By Dr. M. Dbaitdt. 
focula. 
gcometrica. 
decepta. 
tuisa. 
difficilis. 
lorella. 
lobelia. 
minor. 
dissona. 
lesca. 
diffusum. 
procas. 
dimidiata. 
Rh. focula Gr. ( = basifera Wlcr.) (151 g). This and the following 10 species all exhibit the same 
character of marking and colouring: the white forewing partly tinged with pink, with a large trapezoid deep 
olive brown costal-marginal spot, 3 or 4 dentate black transverse lines above the anal angle and a brown 
darkening from the base of the costal margin obliquely to the anal angle, enclosing a more or less silvery white 
streak at the base of the inner margin; hindwing coloured yellow of variable extent, focula is the oldest 
species known, large, without bluish-grey dusting at the base of the inner margin, hindwing of yellowish 
with narrow brown faded margin, hindwing of $ much more darkened. Guiana. 
Rh. geometrica Sells, differs from focula in the pure white area without the intense strewing and 
linear marking; hindwing yellow with a broad black distal mai’gin and distal costal half, fringe yellow. Expanse 
of wings; 62 mm. Brazil (Rio de Janeiro). 
Rh. decepta Sells. (151 g) is exactly like focula on the forewing, while the hindwing is more like that 
of tuisa which, however, is smaller. The under surface is very different and of a complicated colouring. Forewing 
here dark purple grey, the inner margin as far as the anal angle and a broad stripe below the cell and vein 
4 yellow; distal half of costal margin white, with black spots and stripes, subterminally below it a notched 
whitish undulate line with black wedges before it between 6 and the costal margin, and a black sagittate 
streak behind it above vein 7; triangular yellowish marginal spots between 5 and 8. Colombia. 
Rh. tuisa Schs. neither shows a bluish tint in the basal inner-marginal irroration; the distal border 
of the costal spot extends from vein 4, at a distance of 4 mm from the margin, obliquely to the costa, and 
is not rectilinear, but finely dentate; the margin behind the undulate brown marginal line is densely strewn 
with brown. Hindwing yellow, distal margin and border broadly black. Costa Rica. 
Rh. difficilis Schs. (151 g) is larger than the preceding species and differs in the different course 
of the distal border of the costal spot which extends slightly incurved to the apex,'not dentate; the distal margin 
is brown below vein 5, shaded with yellow above it. Hindwing of the $ which is only known hitherto brownish- 
black with yellow inner margin and fringe, and a yellow postmedian spot between the veins 2 and 5. Costa Rica. 
Rh. lorella Dyar (151 h). This and the two next species exhibit the basal inner margin below the 
silvery white longitudinal stripe dusted with bluish, the brown costal spot is long, slightly incurved distally 
as in difficilis, hindwing blackish-brown, the inner margin and a small spot above vein 2 of the hindwing 
yellowish ochre. Forewing broader and more quadrangular than in the other species. Brazil. 
Rh. labella Dyar (151 h) is a large species with long pointed forewings, marked almost exactly like 
the following much smaller species, but with entirely ochreous hindwing with a narrow brownish-black distal 
margin and yellow fringe. Brazil, Novo Friburgo. 
Rh. minor Schs. (= opalistriga Rothsch.) (151 h) resembles labella in the markings of the forewing, 
which differ from those of labella in their being spotted and interrupted above the anal angle, while in labella 
they are proximally accompanied by a distinct fine black line, distally by an angular white line, minor is 
much smaller, the brown tinge of the costal and inner margins distinctly olive green, the hindwing very broad 
dark brown at the costal and distal margins, only the disc and inner margin yellow, mixed with brown. Expanse 
of wings: 43 mm. French Guiana. 
Rh. dissona Schs. (= posttriangulum Rothsch.) (151 h) differs from the preceding species in the 
costal spot terminating distally rounded into the costal margin and not forming a distinct angle in the centre 
of the lower radial branch; the white line on the submedian vein extends almost to its centie, the brown inner- 
marginal ground below it is intermixed with long bluish-white hair-scales. Hindwing yellowish-white, broadly 
brown at the costal margin, with light brown hair at the base and inner margin, and a black spot at the 
somewhat extended anal angle. Expanse of wings: 57 mm. French Guiana. 
Rh. lesca Dyar. The white submedian line extends to behind the centre, the space below it being 
white and light brown, without any grey or bluish tinge; forewing broad and quadrangular. Hind wing exten¬ 
sively blackish-brown, the disc above the lower median branch and the inner margin light yellowish. Brazil 
(Castro, Parana). 
Rh. diffusum Fldr. (151 i). The silvery white submedian line projects here very much upwards. 
Hindwing ochreous, broadly blackish-brown at the costal and distal margins. The purer white forewing lacks 
the pink tinge of the other species, the olive greenish tinge is also absent, it is more reddish brown. Brazil. 
Rh. procas Drc. (151 i) is easily recognizable by its entirely white hindwings exhibiting yellow hair 
at the inner margin and a triangular blackish-brown spot at the anal angle. The white submedian line 
on the forewing is continued to the anal angle. 
Rh. dimidiata Herr.-Schdff. (= endymion Schs.) (151 i) differs entirely from the preceding very 
homogeneous forms. Forewing brown in the costal two thirds, separated by a black line, which is notched 
