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given by means of diagrams on the board, and the superiority of 

 the combination for illuminating purposes was practically 

 demonstrated. 



The thanks of the meeting were given to Mr. Nelson for his 

 communication. 



Mr. R. T. Lewis read a " Note on a Stridulating Organ in a 

 South African Ant," illustrating the subject by drawings and 

 by a specimen exhibited under the microscope. 



Mr. E. T. Newton said this appeared to be a new form of 

 stridulating organ to be added to the number already known, 

 and it was very curious to notice how many different forms 

 there were, not only in different orders of insects, but sometimes 

 also in the same family, for producing a like effect. 



Mr. Karop suggested that an organ of this kind for producing 

 special sounds seemed to imply also the existence of an 

 auditory organ for the perception of the sounds. These were 

 very highly developed in some of the grasshopper tribe, but 

 he was not aware that much was known about them in the 

 Hymenoptera. It seemed a point of interest worth looking 

 up. 



The thanks of the meeting were voted to Mr. Lewis for his 

 paper. 



Mr. Karop regretted that the omission of the last gossip 

 night in consequence of Easter had prevented him from meeting 

 with members on that occasion and obtaining any further papers 

 for the present meeting; and there being nothing further upon the 

 agenda, 



Announcements of meetings and excursions for the ensuing 

 month were made, and the proceedings terminated with the 

 usual conversazione, at which the following objects were 

 exhibited : — 

 Asplanchna priodouta ... ... ... Mr. J. M. Allen. 



Acineta, sp. ? ... ... ... ... Mr. W. Burton. 



Head of Lace-wing Fly ... ... ... Mr. W. Goodwin. 



Stridulating band on abdomen of an Ant Mr. R. Lewis. 

 Gorethra plumicomis (mounted)... ... Mr. R. T. Nevins. 



