292 
CATACLYSME; ACODIA; APROSDOCETA. By L. B. Prout. 
leucansis. 
exquisita. 
obliquilinea¬ 
ta. 
■poly gramma. 
conturbata. 
plurilinea- 
ria. 
murina. 
pauper. 
orina. 
Sikkim, 10 000 feet (Elwes). — leucansis form. nov. (29 a) has a white suffusion on the posterior half of the 
median band and extending for a short distance proximally and distally thereto, somewhat recalling some forms 
of inquinata Btlr. Kaponang, Sikkim, 8000 feet, 27 July 1924 (Major R. W. G. Hingston) Everest expedition), 
type in the British Museum. Perhaps a mere aberration. At Yatong the two forms apparently meet. 
M. exquisita Warr. (29 a), from the same source, is generally smaller and lias the hindwing and underside 
dark, the pale markings very light blue, a brighter shade outside the postmedian, chiefly concentrated in a patch 
which touches the central lobe of the median band, and other characteristic features. It has been found also 
at somewhat lower altitudes in Sikkim, at least down to 8000 feet, and at Phallaloong, Nepal frontier, as high 
as 12 600 feet. 
28. Genus; Cataclysme Hbn. 
(See Vol. 4, p. 265.) 
Probably a derivative of Euphyia, from which it scarcely differs except in the subcostal venation of 
the forewing. Here and in a few other genera ( Zenophleps Hulst, Mesotype Hbn., Acodia Rosenstock, Aprosdoceta 
Turn., Ansorgia Warr., Scotocyma Turn.), which are distributed in the fannistic regions with the exception 
of the Neotropical, the distal areole is wanting, sometimes also the proximal, and the 5th subcostal is well separ¬ 
ated from the others, so as to suggest at least superficially, a remarkable exception to the structure of the whole 
family Geometriclae. In the typical section, which is Palaearctic, the $ antenna is nearly simple and Warren’s 
genus Paraplaneta can, if it is desired, be resuscitated for those in which it is pectinate. Type of the genus: 
riguata Hbn. 
A. Antenna of <$ bi pectin ate ( Paraplaneta). 
C. obliquilineata Hmps. (Vol. 4, pi. 13 m). Pectinations shortish-moderate. Forewing above and beneath 
with the lines, from the cell-dot. outward, straight and parallel with the termen. N. W. India and Buxa, British 
Bliotan. 
C. polygramma Hmps. (Suppl.-Vol. 4, pi. 16 d). Pectinations a trifle shorter than in obliquilineata. 
Lines not so straight nor so strictly parallel, forewing with ante- and postmedian both rather strongly dark¬ 
ened, a large black cell-dot, a strong white.subterminal. Altogether the most sharply marked Cataclysme. The 
$ is considerably smaller than the d>. Kashmir, in several localities. 
C. conturbata Walk. (Vol. 4, pi. 13 1). Similar to plurilinearia, but with the $ antenna pectinate though 
only shortly, forewing above with a distinct cell-dot, underside very sharply marked, etc. N. W. India and 
Yunnan; also in a modified form in N. China (subsp. sternecki Prout Suppl.-Vol. 4, p. 171). 
B. Antenna o f strongly dentate. 
C. plurilinearia Leech (Vol. 4, pi. 7 i). Rather large, in its typical form grey mixed with brown and not 
very dark. For the differentiation from conturbata see above, also Vol. 4, p. 265, 266. W. China. — murina 
Prout (Suppl.-Vol. 4, pi. 16e) is a much darker form, hitherto only known to me in a series from Vrianatong, 
Tibet. 
29. Genus: Acodia Rosenstock. 
Distinguished from Cataclysme (Paraplaneta) by its relatively long palpus (over twice diameter of eye), 
long pectinations of the J 1 , continuing almost to the apex of the antenna, and much more rounded wings; b o t h 
areoles are wanting and the 1st subcostal of the forewing is not so strongly stalked with the 1st radial, indeed 
it can arise separately. Only one species known. 
A. pauper Rosenstock (= pelochroa Lower) (29 a). Sufficiently characterized by the structure. The 
type came from “South Australia”, but the range is now known to be rather wide: Tasmania, Victoria, West 
Australia. 
30. Genus: Aprosdoceta Turn. 
Face rough. Palpus moderate, rough; terminal joint short. Antenna in the <$ bipectinate to apex. 
Thorax and abdomen not crested. “Forewing with outer wall of areole not developed, in $ 5 and 6 stalked 
from near upper angle of cell, 7 free, in $ 5 from slightly above [before] middle of cell. 6 and 7 stalked from 
angle, in both 8. 9, 10, 11 stalked.” Hindwing with discocellulars sometimes bent, 2nd radial from before the 
middle. Genotype: chytrodes Turn. I have not seen either species. 
A. orina Turn. <$, 42 mm. Palpus 214 . Pectinations 10. Forewing with apex pointed, termen bowed, 
strongly oblique, longer than hindmargin; whitish, irrorated and marked with fuscous; lines numerous; ante- 
median from l ' i costa to y 3 hindmargin, posterior half dentate; postmedian from % costa to 4 / 5 hindmargin, 
