Publ. 5. VII. 1915. EREBOMORPHA; MEDASINA. By L. B. Prout. 361 



A. diffusaria Leech (= gigantaria Stgr.) (19 i). Brown with characteristic grey shading proxim ally di//M8aria. 

 to the subterminal line. Underside almost unicolorous. Ussiiri district and Central China. 



119. Genus: Erebomorpha Walk. 



Palpus moderate, rough-scaled. Antenna in ^ bipectinate. Thorax and abdomen hairy beneath. 

 Hindtibia in ^ long, dilated, with a ridge of hair. Forewing with a small fovea; di.stal margin smooth; 1st — 2nd 

 subcostal stalked. Hindwing with distal margin toothed at some of the veins. The genus contains only very 

 few species, but these are among the largest of the Geometridae. It belongs properly to N. India. The typical 

 section, with $ antenna simple, is not represented in the Palearctic Region. 



B. Antenna in ^binectinata {Mesastrafe Wan. = Stygomorpha Th.-Mieg). 



E. censors Btlr. (24 a). Totally distinct from all other Palearctic species. Probably a local form consors. 

 of the Indian fulguraria Walk., but with the white markings broader and some other slight differences. 

 Japan to W. China; Korea; Ussuri district. 



120. Genus: Meclasina Mooi-e. 



Differs from Erebomorpha in neuration, the 1st subcostal vein of the forewing arising from the costal, 

 rarely anastomosing with the 2nd subcostal. Variable in shape and some other characters, the hindwing never 

 with the prominent tails of Erebomorpha. Size moderate to large. Range chiefly Indo- Australian. 



M. scotosiaria Warr. (24 b) is a very glossy, dark fuscous species with the lines pale, somewhat sinuous, scoiosiaria. 

 the postmedian the most characteristic, placed rather near the distal margin, projecting teeth basewards on 

 the veins and somewhat broken basewards at the 3rd radial; the veins in the distal area are also finely pale; 

 sometimes the entire area distally to the subterminal is pale on the forewing. Variable in size, moderate to 

 rather large. Antennal pectinations very long and curved, rather strongly ciliated (forming the type of Warrens 

 genus Deinotrichia). Distal margin of hindwing regularly crenulate. AV. China: Pu-tsu-fang. Described from 

 Sikkim. 



M. albidaria Walk. (= indentata Warr.) is another Indian species which reaches China. Dirty white, albidaria. 

 the lines weakly expressed except as 3 costal spots on the forewing (often also a fourth proximally to the 

 origin of the white subterminal), the postmedian line, however, marked by distinct vein-dashes, especially 

 on the hindwing, on the forewing with a dark M-shaped mark from the 3rd radial to the 1st median, usually 

 accompanied distally by a second dark mark. Forewing relatively long. Hindwing crenulate, slightly pro- 

 minent in the middle. Chang Yang; Omei-shan; Dharmsala. 



M. nikkonis Btlr. (20 a) differs in its more greyish tone, smaller but blacker costal spots, stronger nikkonis. 

 black dashes on the postmedian line, the M-mark not specially developed, hindwing longer and narrower, the 

 distal margin less prominent in the middle. Japan: Nikko. 



M. subpicaria sp. nov. (20 a). Also white with large costal spots, but larger, broader- winged, the subpicaria. 

 lines (except postmedian dots) wanting, the submarginal shades characteristic. Underside white, with large 

 black cell-spots (which show through faintly above), both wings with black costal spots, the apical and mar- 

 ginal (on hindwing subapical and submarginal) patches blacker and better defined than above. Omei-shan 

 (type (J and $) and Chang Yang, in coll. Brit. Mus. Perhaps a large form of ohliteratd Moore. 



M. subdecorata Warr. (20 a). Smaller, much more densely strigulated with fuscous, lines present, mhiecorata. 

 cell-spots present, on hindwing large, strikingly black, underside with the black markings more concise. Omei- 

 shan, only one (a cj) known. Scarcely a form of the preceding, as the wings appear narrower. 



M. corticaria Leech (20 a). Very distinct, easily known by its large size, and characteristic distal cort'waria. 

 area with strong dark cloudings and irregularly developed subterminal line — thickest between the 3rd radial 

 and the fold of the forewing. Central China: Ichang and Chang Yang. 



M. stolidaria Leech (23 a). Again very distinct, recognizable by the fuscous transverse striation on stoKdaria, 

 the light brown ground-colour and the large costal spots ; otherwise the markings are, rather indefinite. Cen- 

 tral China: Chang Yang; W. China: Ni-tou. 



M. differens Warr. (20 a) is quite like a Boarmia except in the neui'ation. It may be compared differens. 

 with B. invenustaria (21 e), but has the lines thicker, more conspicuous brown shades accompanying them, the 

 discal mark of the hindwing is larger, somewhat triangular, obhquely (or almost vertically) placed in relation 

 to the po.stmedian line instead of parallel to it. W. China: Omei-shan. 



IV 46 



