22 THE ENTO.MOLOUIST's KKCOKD. 



suggested that there must be some doubt as to M. Peytoureau's 

 conclusion, as there was a series of these double forms in connection 

 with this genus, and it would be a very extraordinary fact if in one 

 case the second form should be a distinct species, while in other 

 species of the same genus the form corresponding to it should be only 

 a variety. Prof. Poulton exhibited examples of the type labels 

 now in use in the Hope Collection at Oxford, and illustrated their 

 employment by projecting on the screen, by the lantern, a photograph 

 of the Westwood types of Afiucax Eusemli; described in F. Bates" 

 " Matabele Land " (Lond., 1881). He said that such labels, having 

 been once set up in type, could be reproduced in electrotype very 

 cheaply and efficiently. Black ink was considered better than red, on 

 account of its greater permanence. Mr. Verrall said he was of 

 opinion that no species should be described from a single specimen or 

 type, but from many specimens, and he wished every so-called 

 '"type" could be destroyed as soon as a species had been described 

 from it. Mr. lUandford exhibited a series of lantern slides showing 



the USES TO AVUK'H I'UOTOtiUAPHY COULD BE PUT IN ENTOMOLOGICAL ILLUS- 



TUATioN. The photographs shown included various Saturniidae, Yanca- 

 sitlae, species of Maiiustra, Tijnila, Opliiaii, Carabiix, Luccuiiis, Sitoncs, 

 etc., as well as one or two examples of insect injury, and a view in 

 Windsor Park showing oaks defoliated by Tortri.r rir'ulana. Mr. 

 Blandford said that the photographs were taken without any con- 

 siderable practice in photography ; that good and well-set specimens 

 were desirable for reproduction ; the colour-values had to be arrived 

 at by the careful use of orthochromatic methods, and a large lens of 

 good focal length should be used. Careful attention had to be paid 

 to the lighting of the objects, a point in which entomological experi- 

 ence was of great value. Prof. Meldola expressed surprise that 

 photography had hitherto been so little employed in the illustration of 

 works on Entomology. Prof. Poulton read a paper entitled " On 

 THE CouKTSMip OF CERTAIN KuKOPKAN AcuiDiiu.K." The authop Said 

 that these observations upon the courtship of Swiss Acridiulac were 

 made in the exceedingly favourable weather at the end of August 

 and beginning of September last year. He was much indebted to 

 Mr. F. .Jenkinson, of Cambridge, and Mr. V. F. Dickins for many inde- 

 pendent observations and valuable confirmation. The observations 

 were almost all made in the neighbourhood of the Weisshorn Hotel, 

 high above Vissoye, in the Val d'Anniviers. Prof. Poulton stated 

 that Dr. Sharp had been kind enough to name the species referred to 

 in the paper. Prof. Meldola expressed great interest in the paper, 

 and said that the observation of the habits of insects in the field 

 seemed to be much neglected by many entomologists. Dr. Sharp 

 remarked that there was a greater variety in the organs capable of 

 producing sound in the Orthoptera than was generally supposed. 



The North London Natural History Society met on March 

 26th, 1896. The Curator announced a donation from Mr. Bacot of 

 lepidoptera from our " local district," including specimens of Cnlias 

 cdusa, T/ierla Ixiidtif, ( 'assiis lii/iiipcrdd, Zi'Uzcra pi/riua, Picraimra 

 riniila, J h'/ifrn/i/hi ^trdhriiiscida, Churtudes arcuosa, Hj/dniccia iiiititans, 

 Tri]diiis(t (hihitutd, Scafusid r/idiiniata. Exhibits: Mr. Prout, a series 

 OF Caradiuna jiokpheus var. obscura, Tutt, bred from ova from North 

 London. Misses Simmons and Nicholson had both observed bees at 

 WORK. The former lady had noticed that the bee does not curl its 



