180 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xn, 



Length of forewing, 94 mm.; breadth across the discal spot (ocellus), 54 mm. 

 Length of hind wing, 165 mm.; to base of tail, 62 mm.; tail, 103 mm.; width of tail at nar- 

 rowest point, 9 mm. 



Geograpldcal distribution. — Silhet . 



[Rothschild and Jordan (1901) have described a form as A. moenas latona.] 



ARGEMA LETO Doubleday [=male of A. maenas]. 



Plate XLIII, fig. 2; XCVI, fig. a. 



Satumia leto Doubleday, Proc. Ent. Soc. London, V, p. li., PI. 15, 1848. 



Tropaea leto Walker, Cat. Lep. Het. Br. Mud., VI, p. 1263, No. 6, 1855. 



Actios leto Maassen, Beitrage Sehmett., 1, fig. 10, 1S69. 



Actios diana Maassen, Wetmer and Weyding, Beitrage Sehmett., 11, fig. 12, 1872. 



Actios leto Maassen, Weymer and Weyding, Beitrage Sehmett., V, figs. 106, 107, 1855. 



Actios leto Preiss, Abbild, Nachtachmett., p. 5, 6, fig. 1, 1S88. 



Actios leto Kirby, Syn. Cat. Lep. Het., p. 767, 1892. 



Imago. — One o" . Head as in A. mimosse, in front as wide as and much as in A. mimosse, 

 forewings, costa rather more curved, the hind edge of the wing straight, not so full and convex 

 as in A. mimosse, the outer edge less convex, straight. The costal band is limited to the costal 

 edge, not spreading backward over vein II. Ocellus crescentic or sickle-shaped, one horn 

 resting directly on the costal band; it is about three times as long as broad, the convexity 

 facing inward, dull orange red-brown edged externally with darker red-brown, then a blue 

 semicircle inclosed in a dark tan-brown semicircle; no clear space. Wings lemon yellow; fore- 

 wings yellow at the base, beyond is a very broad, dull "brown-pink" band reaching to the 

 grizzly brown costal band and inclosing a triangular post-costal yellow spot. Extradiscal line 

 brown-pink, rather sharply zigzag, coarse, and heavy, succeeded beyond by a broad zigzag 

 concolorous band, which is very wide on the costal edge, and reaches to the apex, becoming 

 very wide on the hinder angle of the wing, reaching to the outer edge from vein IV backward. 

 There is no vein TH\. The discal veins are nearly straight and very slender. Hind wings with a 

 remarkably long tail, twice as long as the rest of the wing, very narrow in the middle, and 

 spreading out in a spatulate way at the end; basal three-fourths brown. Outer margin of the 

 wing lilac pink-brown; and the base pink-brown, extending back to the base of the tail. Ocel- 

 lus round, small, with a dark outer semicircle in front. 



Beneath are three lines, one within and the two others beyond the ocellus; they are nar- 

 rower than above. Base of wings of both pairs lemon-yellow, as well as the rest of the wings. 



Expanse of forewings, 160 mm. 



Length of forewings, 73 mm. ; breadth, 40 mm. 



Length of hind wings, 140 mm; to base of tail, 50 mm. 



Length of tail, 90 mm. 



Breadth of hind wing, 32 mm. 



Width of tail at narrowest part, 3 mm. 



Ocellus of forewing above, 10 by 4h mm.; beneath, 4 by 2£ mm. 



Ocellus of hind wing above, 5 by 5$ mm.; beneath, 4 by 3 J mm. 

 Geographical distribution. — Restricted to the oriental region. Eastern India (Swinhoe) 

 Silhet (Doubleday); Java (Maassen). Specimens from Java do not appear to present impor- 

 tant differences from the Indian ones, the lines only varying in distinctness and width. 



ARGEMA [EUANDREA] DUBERNARDI ^Obertoiir). 



[Tropaea dubernardi Oberthur, Bull. Soc. Ent. France, 1897, pp. 131, 174.] 

 Tropaea dubernardi Joannis, Bull. Soc. Ent. France, 1898, p. 326. 



This is allied to but very different from A. ignescens Moore, the Javanese form or race of 

 A. leto. It differs very much from A. msenas. The ocellus of the forewing is connected with 



