292 CATACLYSME; ACODIA; APROSDOCETA. By L. B. Prout. 



leucansis. Sikkim, 10 000 feet (Elwes). — leucansis form. nov. (2Ö a) haf^ 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 

 oiinquinafa Bflr. Kaponang, Sikkim, 8000 feet, 27 July 1924 (Major R. W. G. Kingston) Everest expedition), 

 type cJ in the British Museum. Perhaps a mere aberration. At Yatong the two forms apparently meet. 



exquisita. M. exquisita Worr. (29 a). from the same source, is generally smaller and has 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 lieen found also 

 at somewhat lower altitudes in Sikkim. at least down to 8000 feet. and at Phallaloong. Xejjal frontier. as high 

 as 12 600 feet. 



28. Genus; Cataclysme Hbn. 



(See Vol. i. 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 Hidst, Mesotype Hbn., Acodia Rosenstock, Aprosdoceta 

 Turn., Ansorgia Warr., Scotocyma ^ Turn.), which are distributed in the faunistic regions with the exception 

 of the Neotropical, the distal areole is wanting, sometimes also the proximal, and the öth subcostal is well .separ- 

 ated from the others, so as to suggest at least suj^erficially, a reniarkable exception to the structure of the whole 

 family Geometridae. In the tyi^ical section. which is Palaearctic. the S antenna is nearly simple and Warren's 

 genus Paraplanefa can, if it is desired, be resuscitated for those in which it is i^ectinate. Type of the genus: 

 riguata Hbn. 



A. Antenna o f o b i j) e c t i n a t e (Paraplanefa). 



obliguilinea- C. obliquilineata Hmps. (Vol. 4, pl. 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 

 Bhotan. 



polygramma. C, polygramma Hmps. (Suppl.-Vol. 4. pl. 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 Catadysme. The 

 $ is considerably smaller than the ^. Kashmir. in several localities. 



conturbata. C. cotiturbata Walk. (Vol. 4. pl. 13 1). Similar to plurilinearia . but with the q 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 oi ^ strongly d e n t a t e. 



plurilinea- C. plurilinearia Leech (Vol. 4, pl. 7 i). Rather large, in its typical form grey mixed with brown and not 



ria. ygj.y dark. For the differentiation from conturbata see above, also Vol. 4. p. 265, 266. W. China. — murina 

 Prout (Supjjl.-Vol. 4. pl. 16 e) is a much darker form, hitherto only known to me in a series from Vrianatong, 

 Tibet. 



29. Genus: Acodia Rosenstock. 



Distinguished from Catadysme (Paraplanefa) by its relatively long paljjus (over twice diameter of eye), 

 long pectinations of the c?, continuing almost to the apex of the antenna, and much more rounded \\'ings: both 

 areoles are wanting and the Ist subcostal of the forewing is not so strongly stalked with the Ist radial, indeed 

 it can arise separately. Only one species known. 



pauper. A. pauper Rosenstock (= pelochroa Lower) (29 a). Sufficiently characterized by the structure. The 



type came from "South Australia". but the ränge is now known to be rather wide: Tasmania. Victoria. West 

 Australia. 



30. Genus : A|>ros<loceta Tum. 



Face rough. Palpus moderate, rough; terminal Joint short. Antenna in the o bipectinate to ajaex. 

 Thorax and abdomen not crested. "Forewing with outer wall of areole not developed, in o 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. (Jenotype: chyfrodes Turn. I have not seen either species. 



orina. A. orina Turn. ,^, 42 mm. Palpus 2^. Pectinations 10. Foi'ewing with apex pointed, tei-men bowed, 



strongly oblique, longer than hindmargin; whitish, irrorated and marked with fuscous; lines numerous: ante- 

 median from i/j Costa to V3 hindmargin. posterior half dentale; postmedian from % costa to ^/j hindmargin, 



miirina. 



