RHYACIA. By Dr. A. Corti and Dr. M. Draudt. 
63 
the Majella, in August. — obscurata (M. Bartel i. 1.) Sohn-Eethel in contrast thereto is deep blackish with obscurata. 
crimson-brown suffusion; from the Alexander Mountains and Kuku-Nor. 
21. Genus: Rliyacia Him. 
As no notes are available for the subdivision of further Genera, which after all only have the value 
of subgenera, I must group the remaining species under this Genus, as it would be impossible to re-classify 
same without immense, painstaking researches, which are not feasible at this juncture. 
Rh. subrosea Steph. (Vol. 3, p. 36, pi. 7 i). On plate 8 i we are giving an illustration of a british $ to subrosea. 
the $ figured in Main Volume. The species has recently been subject to careful revision by Warnecke. 
According to this, the separation of the Island form with reddish tinge ( subrosea ) from the mainland bluish 
grey form (subcaerulea) (8 i) can no longer be maintained. The reddish form also occurs on the mainland. 
Transitions are denominated — Kieferi Rbl. a form that was first discovered at Admont (Styria), but which kieferi. 
also occurs elsewhere in Europe. To subdivide the species further according to shades of colouration seems 
idle, as otherwise there would be no end to such a procedure. The following aberrations are described: — ab. 
latefasciata Huene with darker median area between the transverse stripes.—ab. decipiens Warn. (8i) a mela- latefasciata. 
nic form with monotonous dark brown forewings so that stigmata and bands are only faintly discernible. decl P' iens - 
Also hindwings are very dusky. From the neighbourhood of Hamburg. To the localities already enumerated 
besides Siberia (Minussinsk) we have to add Denmark, Sweden and Norway; since 1908 in Pommerania, 
1923 in Lower Elbe territory, already since 1888 at Hanover; besides Bohemia (around the Hirschberg in 
B.), Styria (Upper Enns Valley) and France (Nantes). The latter is however open to doubt. 
Rh. velata Stgr. (Vol. 3, p. 36, pi. 7 k) almost looks like a form of decipiens of the previous species, velata. 
The illustration in Main Volume was not as good as it should be and we are giving a better illustration here 
(11c). 
Rh. spania Pglr. (Vol. 3, p. 43). Corti classifies this next to velata, as same are very alike. Wing spania. 
contour is narrower, colouration still darker, grey-black without the violet-reddish hue of the preceding 
species. Black basal streak, much less distinct transverse lines, wider reniform stigma and less reddish under¬ 
side. The type is illustrated in the “Iris” Plate 6, Fig. 9. 
Rh. plana Leech (Vol. 3, p. 38, pi. 8 c). 
Rh. subcorticea Stgr. (Vol. 3, p. 38, pi. 8 c). As the illustration in Main Volume does not give the subcorticea. 
right impression of this insignificant species, we are figuring it again here (8 i). 
Rh. cissigma Men. (Vol. 3, p. 38, pi. 8 d). Also this species is being illustrated afresh. The ground cissigma. 
colour is often more reddish than is shown in our illustration and reminds one thereby of brunnea. 
Rh. clariveraa Pglr. (Vol. 3, p. 39, pi. 12 d). As the old illustration was a bad copy we are giving a clarivena. 
good picture here (8 g). 
Rh. musiva Hbn. (Vol. 3, p. 39, pi. 8f). The illustration is good. 
Rh. ellapsa Corti. This closely resembles musiva and clarivena but differs in the first instance by the ellapsa. 
high dorsal brush of hairs on thorax, the scales and hairs of which are strikingly white. Ground colour of 
forewings inclined to brick-red. Instead of the oval claviform stigma there is a velvety black triangle. 
In place of the 2-archecl inner transverse line there is an oblique stripe extending towards the base. It is 
white on top and reddish below. The outer transverse line is simple and faintly dentate. Hindwings brown 
with distinct discal lunule. From Szechuen. 
Rh. triangularis Moore (Vol. 3, p. 43, pi. 9f). Illustration and description of this wide-winged species triangularis. 
should suffice. Hampson classified triangularis with stentzi, but this does not appear justifiable. 
Rh. exoleta Leech (Vol. 3, p. 39, pi. 8e). — infuscata Draes. (11c) denotes much darker fuscous speci- infuscaia. 
mens from Sungpanting (Szechuen). 
Rh. costaestriga Stgr. (Vol. 3, p. 44, pi. 9 h). As the illustration is not good, we are improving and costaestriga. 
repeating it here (8g). 
Rh. albipennis Btlr. (Vol. 3, p. 45, pi. 10 b). We are giving a better illustration here (8g) as in the albipennis. 
illustration in Main Volume the dark median band was extended right to the inner margin, which was in¬ 
correct. 
Rh. glareosa Esp. (Vol. 3, p. 39, pi. 8 f). The illustration is too much mottled with grey, otherwise giarcosa. 
it is good; typical specimens are a nice clear bluish grey or earthen grey. This species seems only to occur 
separately or rarely. — edda Stgr. A good illustration of this form is given (8 h), also of the nice form — edda. 
rosea Tutt (8 h). In regard to the form limbata mentioned in the Main Volume, the ground is tinted with bluish rosea. 
grey and not bluish green. 
