RHYACIA. By Dr. A. Corti and Dr. M. Drattdt. 
75 
Rh. subochracea Corti ined. (He). This is an especially narrow winged species with pale markings, subochracea 
Costal area more yellowish than the purplish black suffused inner marginal and marginal areas. Otherwise 
it is very like dahlii, but the more vertical transverse markings, which are never so oblique as in dahlii, in¬ 
dicate that same is a distinct species. Stigmata are smaller, the reniform stigma yellowish in upper half, 
in the lower half it is densely filled with blackish. From Ta-tsien-lu. Type in the collection of Corti. 
Rh. fannyi Corti ined. (11 e). This species is again one with wider wings. Ground colour inclined to jannyi. 
violet black, only the reniform stigma being somewhat paler and more yellowish than the ground. The space 
before same and behind the orbicular stigma is filled with deep violet black. The dot at end of claviform 
stigma is only very small. Discal and subterminal bands are only indicated by very faint lines and in fact 
all the transverse markings are only very faint and delicate. Hindwings uniformly bistre with slightly paler 
fringes. From 1 $ from Kuku-nor (Thibet). Type in the collection of Corti. 
Rh. hentici Corti ined. (Ilf). This is another species of sleek build, wing contour being like that of henrici. 
subochracea. It is pale reddish brown with darker markings, generally similar in colouration to Leucania evidens. 
The stigmata are not paler than the ground colour, the claviform stigma is very wide, the dark dot in same 
is not black, but brown and only faint. The space between the stigmata and the central shade is deeper brown. 
Thibet. Type in the collection of Corti. 
Rh. subcanescens Corti ined. (Ilf). The general impression reminds one of dahlii, but it is much subcanes- 
paler brownish and without the reddish yellow tone. The transverse line markings are very delicately cens 
drawn and only faintly darker brown. The double anterior transverse line is also situate nearer the centre 
of inner margin. Central shade and subterminal band are faintly darker brown, the dot in the claviform 
stigma exceedingly minute. Orbicular stigma is not paler than the ground colour whilst the reniform stigma 
on the other hand is dotted with black in centre and filled with blackish at lower end. The fine somewhat 
paler subterminal line is shaded with dark on outer edge. On margin there is a fine slightly darker line. Hind- 
wings uniformly dark grey-brown with pale yellowish fringes. Japan. Type in the collection of Corti. 
Rh. ochracea Wkr. (Ilf). This species was omitted from the Main Volume. Outwardly it looks ex- ocliracea. 
actly like the preceding subochracea, but is immediately distinguishable by the pectinated antennae of the 
which in subochracea are only faintly fascicular ciliate. Generally the wings are slightly wider, otherwise 
the markings and colouration are identical. The costal area is perhaps a shade more yellowish than reddish 
brown, the inner marginal and marginal areas slightly more dusted with grey. The transverse markings 
are slightly more oblique. Hindwings darker grey-brown with reddish yellow fringes. Thibet; W. China; Japan. 
Rh. dannehli Corti ined. (11 f). This remarkable species, established from a single caught <$ looks like dannehli. 
an enormous, very wide winged dahlii of pure ochreous yellow colour and with very striking grey-black central 
band. The other markings are only faint, but the dot in the claviform stigma is distinct. Hindwings pale 
blackish with yellowish fringes and blackish marginal streaks. From Gran Sasso. Type in the collection 
of Corti. 
Rh. takanmkui Mats. This should probably be placed in this group and it resembles the subsequent takamukui. 
interca. Forewings greyish brown with indistinct darker markings and double transverse lines. At base of 
cell there is a black-brown spot. Orbicular stigma is large with brown circumscription, open on top and below. 
Reniform stigma yellow-grey, claviform stigma small and black-brown. The fine pale subterminal line is 
shaded outwardly with brownish black and there is a dark triangle on costa. Hindwings somewhat paler, 
dusky towards margin and with dark central spot. Wing expanse: 49 mm. Japan (Honshu). 
Rh. interca Mats. Forewings red-brown, markings like those of deparca, with large stigmata, orbicular interca. 
round, paler than ground colour, reniform yellowish, extended inwardly at lower edge and edged outwardly 
with brown. Transverse lines extinct, central line oblique, marginal veins peppered with grey; the posterior 
transverse line double, both collaterals widely separate. Hindwings grey-brown, paler at base with bistre 
fringes and extinct central spot. Wing expanse: 36mm. Japan (Honshu). 
Rh. deparca Btlr. (Vol. 13, p. 37, pi. 8 a). Looks very like ochracea but is much more reddish brown, deparca. 
The illustration is good. 
Rh. stictica Pouj. (Vol. 3, p. 37, pi. 8 a) and — semipleta (pi. 8 b) are satisfactorily illustrated in 
Main Volume. 
Rh. olivascens Hmps. (Vol. 3, p. 37, pi. 8 b). 
Rh. torva Corii ined. (Ilf). This is a narrow winged species, the colour is a brownish grey and markings torva. 
are much bolder and clearer than in the preceding species. All the transverse lines, also the subbasal are double 
and boldly dentate. The stigmata as in dahlii, also the spot in claviform stigma is present. Subterminal line 
distinct, pale with dark brown shade on both sides. Between same and the postmedian there are double 
black spots on veins with whitish between. Hindwings pale bistre with paler yellowish fringes. From Siao-lu. 
Type in the collection of Corti. 
