74 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



the two extending across the discal space; in one 9 there are eight circlets, one small one 

 beyond the discal ones and one inside of it in the discal cell and one in each of the next cells 

 behind. Extradiscal line broad, diffuse, curved at nearly a right angle before reaching the 

 costa. Hind wings concolorous with the fore wings, with four or five round spots, larger and 

 more distinct, and with a darker circle than those on the fore wings. There is one in the discal 

 cell, two beyond, and two near the inner edge. Fringe silky, pale yellow ochre on the wings 

 of both pairs. A faint straight extradiscal line. 



The tails are very long and narrow, almost linear, from three to five times as long as the 

 wing itself, and widening on the outer third or fourth, and twisted. End of 9 abdomen very 

 full, rounded, and dark buff brown. 



Expanse of fore wings, <? 54 mm.; 9 54 mm. 



Length of fore wing, <? 30 mm. ; 9 29 mm. 



Breadth of fore wing, <? 17 mm.; 9 15 mm. 



Length of hind wing, <? 120 mm.; less the tail 19 mm.; in 9 70 mm. 



Breadth of hind wing, <3 18 mm.; 9 16 mm. 



Width of tail in middle, 1.5 mm.; greatest width near the end, 3 mm. 



It differs from E. argiphontes in its pale salmon color. The number of ocelli is exposed to 

 very considerable variation; in one S there are three ocelli on the fore whig and three on the 

 hind wing, those on the hind wing being situated in a row nearly parallel with the inner edge 

 of the wing. 



" E. brachyura (Drury) at Sierra Leone is very constant, of a buffy rose tint, and about 

 3 inches to 3£ inches across the fore wings. Round Cape Coast Castle, on the other hand, the 

 males very seldom expand more than 2^ inches, have very long tails, and vary in tint from 

 ashy gray to bright yellow and salmon rose. This race may prove distinct enough to be named, 

 but of my five specimens no two are alike, so I prefer not to describe it at present. I must 

 add that, although taken from the type specimen, all three figures of E. argiphontes Kirby are 

 very different, and all unlike the insect." (Rothschild, Nov. Zool., p. 47.) 



Geographical distribution. — "Sierre Leone" (Mr. Smeathman) ; Island of Banana (Smeath- 

 man, fide Westwood and Stoll), Ashanti (Brit. Museum, Walker). Duplicates received from 

 the British Museum and compared with the specimens in that collection. 



The single larva loaned me by the American Museum of Natural History from the shape 

 of its spines and its size had evidently not attained its final stage; and it is fortunate that this 

 is so, as it gives us an idea of its life histoiy and affinities. 



Larva. — Stage before the last: Head large, roundish, about as wide as the prothorax; with 

 groups of microscopic granulations; in color deep reddish amber or honey-yellow, as is the 

 prothoracic collar. Body cylindrical, very densely armed with long, stout spinulated spines, 

 arranged hi eight thoracic and six abdominal rows (eighth segment with only five), as in E. 

 argiphontes; but the tubercles are longer, higher, and sharper than in the final stage of E. argi- 

 phontes. Prothoracic plate large, somewhat crescentiform, armed on the front edge above 

 with four stout pale spines, the two inner ones small, not so long as the others, but simple, 

 ending hi a single stout sharp, spike-like spine, with four or five small setiferous spinules along 

 the base; the two others nearly twice as thick and ending in three diverging spikes; below are 

 eight or nine smaller setiferous spines. 



The second and third thoracic and the abdominal spines are very large, erect, long, and 

 stoutly spiked, those of the second and third thoracic segments ending in four to five spines, 

 two or three of which are terminal and no larger than those of the supraspiracular lateral row; 

 those of the infraspiracular row nearly as large; those of the lowest lateral row situated directly 

 over the legs are quite large, spiny, and end in two stout spikes. 



The tubercles of the abdominal segments are of the same height or length as the thoracic 

 ones, the differentiation which takes place at the last molt not yet having been effected so 

 that the abdominal dorsal spines are of the same size and appearance as the thoracic ones, 

 though the former (abdominal) have a terminal spike less, only two in all. 



