RHYACIA. By Dr. A. Coeti and Dr. M. Deaudt. 
79 
Rh. stentzi Led. (Vol. 3, p. 42, pi. 9f). The illustrations in the Main Volume were very good and etenLzi. 
suffice to identify this nice species. It is widely distributed in Asia. — punjabeiisis Strd. has greyer forewings punjaben- 
ancl a definite central line and more distinctly black claviform stigma. Kashmir, Punjab. 
Rh. ulricl Gorti ined. (12 a). There is no doubt that besides stentzi there is a second species that closely ulrici. 
resembles same. In the first instance it has narrower, more elongate wings and it is of somewhat larger size. 
The colouration is approximately the same, but the postmedian area contrasts by its paler grey from the 
general reddish brown ground colour. The pale subterminal line beyond same is very regularly dentate. The 
claviform stigma is longer. Alexander Mountains; Kuku-nor. 
Rh. dulcis Alph. (Vol. 3, p. 42). 
Rh. refulgens Warr. (Vol. 3, p. 43, pi. 9f). 
Rh. musivula Stgr. (Vol. 3, p. 43, pi. 9g). 
Rh. obliqua Gorti ined. (12 a). This is related to the stentzi group. It is a small species; collar deep obliqua. 
velvety black. Forewings purplish black, paler brownish towards the margin. Costa widely pale grey, with 
faint violet suffusion like the stigmata. A deep black triangle basally below the cell. A wide bluish grey 
oblicpie band outwardly extends over the wing just beyond the deep black claviform stigma. Both the other 
stigmata shaped as in stentzi. The postmedian line is simple, undulate and dentate. Marginal area is narrowly 
darker than the paler brownish plain postmedian area. No distinct subterminal line. Small black triangles 
on margin. Hindwings uniformly bistre with more whitish fringes. Ta-tsien-lu. Szechuan. Type in the col¬ 
lection of Coeti. 
Rh. c-nigrum L. (Vol. 3, p. 43, pi. 9g). Various denominations of the darker aberration have been c-nigrum. 
made of this very variable species. Actually these are all superfluous. The oldest name for same is probably: 
— Uinbrata Schultz (= nigrescens Bur esc h , maerens Dhl.). They are unicolourous dark violet-black specimens, umbrata. 
Only the triangular orbicular stigma that is paler towards costa, a black dot at base of wings and the costal 
mark are visible. — rosea Tutt are paler, somewhat reddish suffused specimens forming a transition to degenerata rosea. 
Stgr. — depravata A. B.-H. has duller blackish forewings with a slightly coppery sheen. Orbicular stigma and depravata. 
the central costal paler mark are absent. Hindwings as in type form. Described from Yarkend. — degenerata degenerata. 
Stgr. (Vol. 3, p. 43, pi. 9 g). According to Coeti’s researches, this is no separate species, as the genitalia are 
exactly as in c-nigrum. It is merely the paler and generally slightly smaller central asiatic form, which is 
also found in Spain. 
Rh. stupenda Btlr. (Vol. 3, p. 43, pi. 9 h). 
Rh. mandarina Leech (Vol. 3, p. 43, pi. 9 h). 
Rh. vidua Stgr. (Vol. 3, p. 43, pi. 9 h). 
Rh. subpurpurea Leech (Vol. 3, p. 44). 
Rh. consanguinea Moore (Vol. 3, p. 44, pi. 9 h). 
Rh. triangulum Hufn. (Vol. 3, p. 44, pi. 9i). — avellana Hirschke are very pale reddish brown speci- avellana. 
mens. — obseurior Sdlzl are the counterpart, being very dusky. obscurior. 
Rh. ditrapezium Bkh. (Vol. 3, p. 44, pi. 9 i). The illustration was not very satisfactory. We are giving ditrapezium. 
a better illustration here (12 a). As in the former species, especially pale specimens are named: pallida Hoffm. pallida. 
These are described from Styria, but occur everywhere. — orientalis Strd. Described from W. China and Japan, orientalis. 
They have darker bodies and forewings, the colour is a deep purplish. Hindwings as in type but with ochreous 
fringes. 
Rh. plecta L. (Vol. 3, p. 44, pi. 9 k). Many aberrations of this common species are described. — mucidata muddata. 
Dhl. The stigmata are extinct. The pale costal streak is enwidened covering the entire area of the stigmata 
and diffusing gradually outwards. — rubricosta Fuchs with costal streak darker reddish, forming a transition rubricosta. 
to — fuscicosta Hirschke with costal streak still darker, so that it no longer contrasts with the red ground colour. — fuscicosta. 
strigata Hirschke denotes very pale specimens with more distinct transverse lines and dark triangular spot strigata. 
on costa before the subterminal line. A distinct basal streak. — fasciolata Heinrich has veins at margin of fasciolata. 
hindwings dusted with black to an extent of 2—3 mm, creating the impression of a subterminal marginal 
band. — plectella Strd. has a purplish costal area like rubricosta, but at the same time the subcostalis andmediana pleciella. 
have white streaks. 
Rh. leucogaster Frr. (Vol. 3, p. 44, pi. 10 a). 
Rh. sigma Schiff. (Vol. 3, p. 45, pi. 10 a). — ab. terminalis Strd. On forewings the costal and marginal terminalis. 
areas, excepting near the anal angle are paler rose-red. In all probability this is the same as nubila Esp. 
