SCIENTIFIC SOCIETIES. 157 



Mr. F. E. Bediia! (1 read a paper containing the results of his examination 

 of the Chimpanzee " Sally" and the Orang " George," lately living in the 

 Society's Menagerie. The author's remarks referred principally to the 

 external characters and the muscular anatomy of these Anthropoid Apes. 



A communication from Mr. A. G. Butler gave an account of a collection 

 of Lepidoptera from Sandakan, N.E. Borneo. 



Mr. G. A. Boulenger gave an account of a third collection of fishes 

 made by Surgeon-Major A. S. G. Jayakar at Muscat, East Coast of Arabia. 

 Amongst these was a specimen of Histiopterus typus, a fish described in 

 ' Fauna Japonica,' but not since recognised ; and an example of a new 

 species of Box, proposed to be called B. lineatus. 



A communication from Dr. W. B. Benham contained a description of 

 three new species of Earthworms from British Colombia and South Africa. 

 These were proposed to be called Plutellus perrieri, Microclimta papillata, 

 and M. belli. 



Mr. F. E. Beddard read a paper on some new species of Earthworms of 

 the genus Perichceta. 



A communication was read, from Dr. H. Bolau, on the specimens of 

 Haliaetus pelagicus and H. branickii, now living in the Zoological Gardens 

 of Hamburgh. Coloured drawings of these nearly allied Sea Eagles were 

 exhibited. 



March 1. — Dr. A. Gunther, F.R.S., Vice-President, in the chair. 



The Secretary read a report on the additions that had been made to the 

 Society's Menagerie during February, and called attention to two Short- 

 winged Tyrants, Machetornis rixosa, purchased Feb. 15th, being the first 

 examples of this bird that have reached the Society; and to a female 

 Beatrix Antelope, Oryx beatrix, from Arabia, presented by Lieut.-Col. Talbot, 

 Feb. 18th. 



Mr. J. Graham Kerr gave a short account of the expedition up the Rio 

 Pilcomayo in 1890-91, which he had accompanied as naturalist. Mr. Kerr 

 made remarks on the animals met with on the banks of the Pilcomayo, 

 and exhibited, with the aid of the oxy-hydrogen light, a series of photographs 

 illustrating the vegetation of the district and its native inhabitants. 



Mr. G. F. Hampson read a paper on stridulation in certain Lepidoptera, 

 and on the distortion of the hind wings in the males of certain Omma- 

 tophorince. The author attributed the clicking sound described by Darwin 

 as produced by various species of the South American genus of butterflies 

 Angerona, and confirmed by Wallace and other observers, to the presence 

 of a pair of strong corneous hooks on the thorax, which play on a pair of 

 curved hooks with spatulate ends attached to the inner margin of the fore 

 wing close to the base, and surrounded by a membranous sac which acts as 

 a sounding-board. An account was given of a similar sound produced by 



