20 Lloyd's natural history. 



notice of IMcssrs. Bates and Wallace in the immediate neigh- 

 bourhood of Para. The former writes of them as follows, in 

 the first chapter of his "Naturalist on the Amazons : — " One 

 day we made our first acquaintance with two of the most beau- 

 tiful productions of Nature in this department, namely, the 

 Hclicopis ciipido and H. endymion. A little beyond our house 

 one of the narrow green lanes which I have already mentioned 

 diverged from the Monguba avenue, and led, between enclo- 

 sures overrun with a profusion of creeping plants and glorious 

 flowers, down to a moist hollow, where there was a public well 

 in a picturesque nook, buried in a grove of Mukaja palm-trees. 

 On the tree-trunks, walls, and palings, grew a great quantity ot 

 climbing Pothos plants, with large, glossy, heart-shaped leaves. 

 These plants were the resort of these two exquisite species, and 

 we captured a great number of specimens. They are of ex- 

 tremely delicate texture. The wings are cream-coloured ; the 

 hind pair have several tail-like appendages, and are spangled 

 beneath as if with silver. Their flight is very slow and feeble; 

 they seek the protected under surface of the leaves, and in 

 repose close their wings over the back so as to expose the 

 brilliantly spotted under surface." 



THE silver-spot BUTTERFLY. HELICOPIS ACIS. 



{Plate XXXIX. Figs, i, 2.) 



Papilio acis^ Fabricius, Spec. Ins. ii. app. p. 504 (1781). 

 Papilio gjiidus^ Fabricius, Mant. Ins. ii. p. 64, no. 607 (1787). 

 Rusticus arJiiatus g/iidus, Hiibner, Samml. Exot. Schmctt. i. pi. 



loi (1816 ?). 

 Fapilio eiidymion^ Cramer, Pap. Exot. iii. pi. 244, figs. C, F 

 (1779); Stoll, Suppl. Cramer, pi. iv. figs. 5.7, b (1787). 

 This is the largest and darkest species of the genus, and is 



