RIFARGIA. By Dr. M. Draudt. 
1005 
R. nebulosa Schs. (153 cl) is a rather variable species very closely allied to the preceding ones; forewing 
greyish-white, the disc lighter and scantily strewn with brown, with the same lines as in felderi, and brown dusting 
behind the postmedian line especially towards the costal margin. Hindwing white with a grey inner margin and 
distal margin. The $ is greyer with a brown costal spot at the base and grey hindwings. Mexico, Costa Rica. 
— f. medioclara Schs. which may be a distinct species has almost black forewings with a white area at the cell- 
end and a blackish shadowy stripe behind it in the cell-end. Hindwing white with narrow black veins and margins. 
Costa Rica. 
R. lineata Drc. (153 e) is probably one of the most common Notodontidae of a very vast range; it looks 
rather much like felderi , but it is much larger and especially the median area is more mixed with brownish, 
the posterior transverse line quite red-brown, close behind it follows an almost straight black line behind which 
there is a black notched shadow, a large white spot below it and reddish-brown strewing above the anal angle. 
Hindwing yellowish-white with a broad grey marginal band. Florida and Mexico to Brazil. 
R. distinguenda Wkr. (= dubia Moschlr.) (153 e) is likewise very common and widely distributed, 
similar to the preceding species; forewing greyish-white, quite similarly marked, but more intensely strewn, 
the double transverse lines finer, often hardly noticeable, the basal area more or less brownish, with fine black 
internerval streaks subterminally. Mexico to Brazil. 
R. dissepta Schs. is very closely allied to distinguenda and may be a form of it; forewing white, densely 
strewn with light brown, the anterior transverse line is absent, the posterior one only single, a brown median 
shadow before it; subterminal line whitish, dentate, some black streaks behind it in the upper half and above 
the anal angle. Hindwing white with a broad black margin. The median area below the cell and a shadow at 
the cell-end are blackish-brown in the $. Expanse of wings: 45—47 mm. Costa Rica. 
R. guianensis Schs. Forewing silvery white strewn with dark brown and similar markings; one small 
triangular spot each at the bases of the costal margin and inner margin, traversed by an oblique dentate line, 
5 costal-marginal spots between the centre and the apex; the centre is crossed by a fine partly double line before 
and behind which the strewing is denser; a velvety brown postmedian line is dentate only in the lower half 
dark streaks behind it towards the costal margin, and a fine undulate line behind them. Hindwing white, broadly 
dark brown at the inner margin, narrowly at the distal margin. Guiana. 
R. bianca Schs. (153 e). Forewing white, scantily strewn with brown, broadly light brown at the 
apex, a similar small spot also at the inner angle, the median and distal transverse lines very indistinct, 2 fine 
dark lines at the cell-end; 2 parallel black lines from the base of the costal margin to the first quarter of 
the inner margin, an almost straight thick black line is before the margin with small black internerval spots 
behind it. Hindwing white with blackish veins. Brazil. 
R. apella Schs. (153 e). Forewing light brown with a large white irregular triangular area in the centre, 
enclosing a black ring at the cell-end; transverse lines black, the submarginal line being most distinct. Hindwing 
brownish-white, dark brown at the distal margin. Brazil, Colombia. 
R. cinga Schs. is very similar to apella ; forewing silvery white strewn with grey and fine double black 
transverse lines and reniform macula ; a broad reddish-brown oblique shadow traverses the median area from 
near the base of the costal margin to the inner margin at the posterior transverse line which extends down almost 
straightly and only shows 2 outward bends above the inner margin; marginal area iridescent reddish-brown 
dusted with white and with a black subterminal line the dents of which in the lower half extend to the margin. 
Hindwing reddish-brown. Expanse of wings: 54 mm. British Guiana. 
R. causia Schs. (= titus Koehler) (153 e). Forewing white in the basal half and in an area near the 
distal margin, the rest light brown, strewn with grey here and there and separated from the white by a black 
line; 2 short black parallel streaks behind the cell, and a very angular submarginal line, the veins of the marginal 
area black. Hindwing white with a brown anal streak. Brazil. 
R. tethys Schs. Forewing dark grey with brownish transverse shadows and black transverse lines, 
the interior one double, the distal one single; a yellow spot bordered with black is at the cell-end, and black 
internerval spots edged with yellow inside are before the margin, a white crescentiform apical spot at the 
costal margin, yellow vein-dots on the base of the fringe. Hindwing brown, yellow at the base. Expanse of 
wings: 45 mm. Brazil (Rio de Janeiro). 
R. brurmea Msclilr. Forewing red-brown, dusted with a lighter reddish-yellow along the costal margin 
and below the median vein and from there between the veins 5 and 6 to the margin; both the transverse lines 
fine black, the anterior one forms 3 bows to the inner margin, the posterior one is double, dentate, removed 
considerably inwards between the veins 3 and 2; the veins behind it are black strewn with white; a large whitish 
reniform macula at the cell-end, its centre filled with reddish-brown, and finely surrounded with black, a thick 
black longitudinal streak extends from it outwards; undulate line light, dark brown shading before it. Black 
nebulosa. 
medioclara. 
lineata. 
distin- 
fjuenda. 
dissepta. 
guianensis. 
bianca. 
apella. 
cinga. 
causia. 
tethys. 
brunnea. 
