Mr. J. Wood-Mason on two neio Species o/Papilio. 103 



82. Zacorus carus, sp. n. (11). 



Primaries and thorax above shining silvery white ; secon- 

 daries and abdomen shining lilacine grey. Under surface 

 shining greyish brown, with silvery whitish fringes. Ex- 

 panse of wings 27 millim. 



One example. 



This is a very pleasing little moth, which at first sight 

 might almost be mistaken for Sciapliila Gouana ; it is, how- 

 ever, allied to the preceding genera and to (Ecophora. 



XIII. — Descriptions of two new Species o/' Papilloyro??i North- 

 eastern India^ loith a Preliminary Indication of an appa- 

 rently new and remarhahle Case of Mimicry between the two 

 distinct Groups xoliich they represent. By J. WoOD- 

 Mason, Deputy Superintendent, Indian Museum, Calcutta, 

 on Special Duty with the Government of India. 



1, Papilio silchimensisj n. sp. 



^ . Anterior wings oval, with the outer margin regularly 

 rounded, and not in the least degree scalloped ; above greenish 

 black, with the base, the costal margin, cellular streaks, the 

 folds of the membranous interspaces between the veins, and 

 the veins narrowly bordered on both sides by intense velvety 

 black, with the wing-membrane between the streaks and 

 between the veins and black folds peppered regularly and 

 rather sparsely with minute elongated whity-brown scales, 

 and with the short cilia pure white, broadly but almost im- 

 perceptibly intersected by black.. 



Posterior wings elongated and narrow, each with a well- 

 developed spatuliform " tail " in the usual position ; above 

 ■with the basal half green-black, the rest of the organs being 

 intense velvety black, with a conspicuous cretaceous-white 

 patch situated immediately beyond the end of the cell, and 

 dividad by the black- bordered veins into three parts or spots — 

 one, large and subfusiform, between the second and third 

 median veinlets, another between the third median veinlet and 

 the discoidal vein, still larger and tilling the basal half of the 

 space, and a third, more or less than one third the size of the 

 first, between the discoidal vein and the second subcostal 

 branch, just before the middle of the s])ace and of the second 

 spot ; each of these spots irroratcd at the edges with red 

 scales, especially externally and below, Avith a marginal and 

 wavy submarginal series __^of four rich deep violascent red 



