50 



Agriades coridon occurring at Shere, Surrey, vh.: — (1) A dwarf 

 form found at the top of the downs ; (2) a somewhat larger one at 

 the foot; and (3) a still larger one, which does not appear until the 

 two smaller forms are about over, and then is found over the entire 

 hillside. He also showed a series from Royston, Herts, for com- 

 parison. 



On the 12th of July, 1917, and on the 15th of the same month 

 in 1918, this species was very abundant at Shere, a large number 

 being worn. As most species of insects appeared to be as forward 

 in 1919 as they were in the two previous years, he fully expected to 

 find A. coridon when he visited the locality on July 9th last. But 

 not a single specimen was observed, although it was a cloudless day. 

 However, on visiting the spot on August 2nd, the species was found 

 to be out, though not in any great numbers. About two dozen 

 specimens only of the dwarf form were observed, but, with the 

 exception of two, all were in poor condition. The larger form was 

 fresh, but scarce as compared with the two previous years. Two 

 specimens only of the largest form were seen. 



On the 19th of August, when the downs were again visited, the 

 males of the larger form were found to be few in number, and 

 mostly in poor condition. The females were plentiful but not in 

 much better condition than the males. No dwarf was observed, 

 neither was a specimen of the largest form seen. 



Messrs. Blair and Main exhibited living aquatic larvse of 

 Coretlira sp., MochlonijA' sp., Cchlerohatus neiiiorosus, and Ano])heles 

 bifitrcatns. He ?aid that the Coretlira were eating each other in 

 default of Entomostraca, their usual food ; and the Mocldonyx 

 swallowed the Ochlerobatus larvae whole, tail first, subsequently 

 casting up the skin and other undigested matter. 



Mr. B. S. Williams exhibited a bred series of the melanic form 

 of Dysstroiiia triincata from Finchley ; although of the second brood, 

 they equalled the first brood specimens in size. 



MARCH 25th, 1920. 



Mr. A. A. W. Buckstone exhibited short series of Brephos par- 

 thenias from Wimbledon, Oxshott, Darenth Wood, and West Wick- 

 ham, and stated that the Wimbledon examples were, speaking 

 generally, larger and darker than those from the other districts. 

 One of the former series has greasy-looking forewings, due to an 



