collected by W. J. Burchell in Brazil. 185 



On 683 he had written " Angcrona Arete Bdv. Lucas. Are- 

 thusa Gram. 77 nee Arethusa Hb. Sarnml." 



Opposite Burchell's species of Peridromia and Ageronia 

 Westwood has accidentally written for the latter name that 

 of the Geometrid genus Angerona. 



Peridromia amphinome, Linn. 



Bz. 351. J. [15. 10. 25]. =690. Minas Geraes. "At the 



Discoberto do Antonio Velho." " P[apilio']. This 



species and the following \_Peridromia feronia, Linn.] 



settle on the smooth sunny bark of the, trunks of large 



trees, and when in their flight they meet another of 



the same species they appear to fight, and at the same 



time produce with their wings an extraordinary and loud 



and quickly repeated crackling noise." 



The same fact was observed seven years later by Charles 



Darwin, and recorded in his 'Journal of Researches &c.,' 



London, 1876, pp. 33, 31 (Rio de Janeiro, 1832) : — 



" I was much surprised at the habits of Papilio feronia. 

 This butterfly is not uncommon, and generally frequents the 

 orange-groves. Although a high flier, yet it very frequently 

 alights on the trunks of trees. On these occasions its head is 

 invariably placed downwards ; and its wings are expanded in 

 a horizontal plane, instead of being folded vertically, as is 

 commonly the case. This is the only butterfly which I have 

 ever seen, that uses its legs for running. Not being aware of 

 this fact, the insect, more than once, as I cautiously approached 

 with my forceps, shuffled on one side just as the instrument 

 was on the point of closing, and thus escaped. But a far 

 more singular fact is the power which this species possesses 

 of making a noise. Several times when a pair, probably 

 male and female, were chasing each other in an irregular 

 course, they passed within a few yards of me ; and I distinctly 

 heard a clicking noise, similar to that produced by a toothed 

 wheel passing under a spring catch. The noise was con- 

 tinued at short intervals, and could be distinguished at about 

 twenty yards' distance : I am certain there is no error in 

 the observation." 



See also Lepidoptera Rhopalocera of the ' Biologia Centra] i- 

 Americana,' F. D. Godman, F.R.S., and O. Salvin, F.R.S., 

 vol. i. pp. 267, 268. 



12. 3. 26. = 691. Rio de Janeiro. " Aqueduct." 

 Bz. 20. 3. 26. 2 = 692, 693. Rio de Janeiro. " Along the 



Carioca Aqueduct." 

 Ann. & Mag. N. Hist. Ser. 8. Vol. ii. 13 



