I02 LLOYDS NATURAL FIISTORY. 



description and figure were taken is now in the Museum of 

 Science and Art in Dublin. It was probably brought from 

 some part of the coast of Tropical (West) Africa; but the 

 exact locality is unknown. 



GENUS ARSENURA. 

 Arsenura, Duncan in Jardine's Nat. Libr., Exot. Moths, p. 125 



(1841). 



In this genus, which is confined to Tropical America, the 

 antennre are shortly but strongly bipectinated in the male 

 (thick and fusiform in the female), the body is moderately 

 stout, and in the female the abdomen is sometimes nearly as 

 long as the hind-wings. The fore-wings are strongly arched 

 before the tip, but the latter is rounded off, and the hind margin 

 is only slightly concave. There are no eye-spots. The hind- 

 wings in the male are nearly square, and the hind margin is 

 deeply concave, making the lower part of the wing sub- 

 caudate (very conspicuously so in some species) ; as it projects 

 outwards in the females, the concavity is scarcely marked in the 

 latter. 



The half-grown larva is provided with four long fleshy 

 filaments towards the head, and two towards the tail, which are 

 lost in the full-grown larva. 



ARSENURA CASSANDRA. 

 [Plate CXX , Fig. i; lat-va, Figs. 2, 3.) 

 Aitaais cassajidra, Cramer, Pap. Exot., iii., pi. 197, fig. B 

 (1780) ; Stoll, Suppl. Cram., pi. 19, figs. 2, 2c, 2D 

 (1790). 

 This species is a native of Surinam and Brazil, and 

 measures five or six inches in expanse, our figure being reduced 

 from 5 J inches (the actual size of the specimen figured) 



