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Exhibitions. 



An unrecognised Acraea. — Mr. S. A. Neave exhibited a 

 remarkable and unrecognised species of Acraea. The type, 

 which is from Nigeria, is in the Adams Collection in the British 

 Museum, and was described and figured by Lathy, in the 

 Transactions of the Society for 1903, as a Lycaenid, and placed 

 in the genus Telipna. The name for this species will there- 

 fore stand as Acraea actinola, Lathy. 



Mr. Neave pointed out that it is such a very distinct species 

 that it is difficult to assign a place to it among the known 

 African species of Acraea. From the distribution of the spots 

 and the remarkably short and rounded forewings, it is possibly 

 remotely allied to A. disjuncta, Grose-Smith. 



ScYMNUS ARCUATUS. — Mr. DoNiSTHORPE exhibited a series 

 of Scymnus arcuatus Ross., a bit of a leaf of ivy with the 

 pupal skin of the beetle on it, and larvae of the Aleurodes on 

 which it preys, also the Aleurodes and a chalcid {Encarsia 

 sp. ? c? and 9) and a Neuropteron parasitic on the Aleurodes, 

 all taken at Stonor Park, Aug. 6th, 1915, through the kindness 

 of Lord Camoys and the Rev. Fr. Perry. 



Mr. Donisthorpe said that the late Mr. Wollaston had 

 taken the beetle at Shenton Hall in Leicestershire, but that, 

 as he had taken it first in Madeira, some doubt had been cast 

 on his British captures. Mr. Donisthorpe had been to Shenton 

 Hall some time ago, and the ivy on the walls was in similar 

 condition to that at Stonor Park. He also communicated 

 the following paper descriptive of the life-history of the 

 insect, sent to him by Fr. J. F. Perry. 



Notes on Scymnus arcuatus. 



From July 17th to Sept. 5th over a hundred specimens, 

 including five larvae and five pupae, have been taken on the 

 ivy at Stonor House, five and a half miles from Henley-on- 

 Thames. The sexes were in about equal numbers. On July 

 31st I found two larvae and four pupae. The smaller of these 

 larvae attacked the other and bit it in the side. It did not 

 recover and was unable to cast its skin, though it took the 

 characteristic shape of a pupa. On Aug. 3rd the other larva 

 pupated, having doubled its size in rather less than four days. 



