( Ixxiv ) 



years old. The third specimen belongs to Mr. South, and is 

 labelled ' Bohemia.' 



"A series of undoubted L. testacea, mostly labelled from 

 about the same (Lancashire) district, is followed by four speci- 

 mens of the unidentified insects, and these again by several 

 specimens undoubtedly of L. testacea, of the palest form, taken 

 by myself, mostly at liainham, named more for convenience 

 than from conviction, L. gueneei. 



" It will be noticed at once that the form of the fore-wings 

 in the Lancashire insect is much narrower than in either 

 L. testacea or (reputed) L. nickerlii. 



" With respect to the possible connection of these Lancashire 

 specimens, with L. gueneei, I have consulted what I believe to 

 be Henry Doubleday's original description in the ' Entomolo- 

 gists' Annual/ for 1864, p. 123. He says of L. gueneei, 'It 

 differs from L. testacea in the thorax and abdomen being 

 slenderer, in the peculiar mottled appearance of the upper 

 wings, and in the absence of the three ro%mid white dots on the 

 costa near the apex, which are so distinct in L. testacea and 

 L. nickerlii. The posterior wings in both sexes are of a much 

 purer white than in L. testacea.' 



" For myself, I would only remark that I am not acquainted 

 with the three round ichite dots, in our common species, and do 

 not see them in the (reputed) L. nickerlii. 



" The second box contains a further supply of L. testacea, and 

 pale forms thereof from Rainham." 



Discussion of the affinities of Agriades thetis 

 (bellargus) and a. coridon. 



In the absence of Mr. J. W. Tutt, who was indisposed, 

 Dr. T. A. Chapman opened a discussion on the affinities of 

 Agriades thetis {bellargus) and A. coridon, and exhibited a 

 number of photographs upon the screen to illustrate his views, 

 being details of species included in the Plebeiid group. 

 These included slides of the ova of thetis and coridon by Mr. F. 

 Noad Clark and Mr. A. E. Tonge, and of the first instar of the 

 larvae of Pleheius argus, L., P. argyrognomon, Bergs., A. 

 coridon, and A. thetis ; a photograph of the larva of thetis by 

 Mr. Hugh Main, also showing the "fan" structures remark- 



