106 



Life-history of A rgnlus foliaccus, the Parasite of the Stickle- 

 back," and illustrated his remarks with a large number of 

 very fine slides showing the minute structure of this curious 

 form of animal life (page 12). 



OCTOBER 23rd. 1902. 



Mr. F. NoAD Clark, President, in the Chair. 



Mr. Inglis, of Clapham, and Mr. Scollick, F.E.S., of 

 Wimbledon, were elected members. 



Mr. South, on behalf of Mr. Fowler, of Ringwood, 

 Hants, exhibited a series of Lithosia deplana, Esp., repre- 

 senting variation of the female. One of the forms was 

 dark grey in colour, with a yellow stripe on the costa, 

 extending to the yellow fringes agreeing with var. ochreola, 

 Hiibn. (Fig. 96). iVnother form had the fore-wings almost as 

 yellow as in L. sororcnla, and the hind wings only slightly 

 tinged with grey. All the specimens were obtained in the 

 New Forest. 



Mr. Tutt pointed out that when variation occurred in the 

 Lithosiids it generally took one of two directions, either a 

 general darkening, or an intensification of the yellow, even 

 becoming golden in some species, such as L. hitareUa, in the 

 Alps. He also remarked upon the constancy of the golden 

 yellow costa in spite of any otherwise general darkening. 



Mr. Dennis reported that at Earl's Colne, in Essex, he had 

 found a flower of the dais}^ {Bcllis perennis) with leafy bracts 

 forming the involucre of the capitulum. He also said that 

 on October gth there were to be found all stages of Cyaniris 

 argiolus among the ivy at the same place. 



Mr. Turner exhibited a number of specimens oi Hypsipetes 

 fiircaia = sordidata = eliitata, illustrative of local forms, and 

 remarked upon the inconvenience caused by the continual 

 change of the specific names. He quite saw that with 

 increased knowledge it would be frequently necessary to 

 change the generic name, but he trusted that ere long the 

 specific name would reach its final determination. 



Mr. B. W. Adkin exhibited some very fine forms oi Pachy- 

 gastria (Bombyx) trifolii bred from larvae taken in the Isles 

 of Scilly. One female was conspicuously light, and the 

 wedge-shaped markings on the fore-wings of several males 

 were enlarged and very prominent. 



