70 



background, with the red spots run into splashes ; a specimen of Z. 

 trifolii ab. minoides, from Swinley Woods ; and a cocoon of Z. 

 meliloti from the New Forest. 



Mr. H. Moore exhibited a beetle, Monoluninnus tittilator, taken in 

 Eotherhithe, probably an immigrant from a ship in the Surrey 

 Docks. 



Mr. Hy. J. Turner exhibited a short series of the Nymphalid 

 Dione vanillm var. maculom, the larva of which feeds upon various 

 species of Passiflora in the Neotropical Eegion ; the species ranges 

 from the Southern States to Argentina ; also the " skipper," Cal- 

 podes etJdiits, a robust species occurring commonly over the same 

 area ; the larva feeds upon (Janna : a pair of the large and beauti- 

 ful moth, Badlona imjierialis, whose caterpillar is one of the 

 " horned devils." All three species were taken in the neighbour- 

 hood of Cordoba, Argentina. 



The President read a Paper he had received from Mr. F. W. 

 Frohawk, " The Migration of Birds." (See page 10.) 



OCTOBER 23rd, 1919. 



The President introduced the discussion on the " Variation shown 

 in Ai/lais urtictc," stating that in Seitz' " Gross-schm. " at least 24 

 names of various forms are used, and that its area of distribution 

 is very extensive, reaching Japan, where a most remarkable form 

 known as connexa occurs, and India, where it is met with up to an 

 elevation of 14,000 ft. He pointed out that Hiibner, " Yerz.," 

 placed it in the genus Kiir/onia, but that, as pointed out by Scudder, 

 " Sys. Eevision Gen. of Am. Butt.," Dalman, " Vet. Ac. Hand.," 

 xxxvii., 56, 64, had previously, 1818, established the genus Ai/lais 

 for this species alone. 



Mr. Hy. J. Turner then read the following: — 



Notes on the " Variation in Aglais urtic^." 



Placing an ordinary specimen of A(/lai>t urtuuc before us, what are 

 the elementary features which are available for circumstances to 

 work upon ? and what are the lines which the variation takes ? 

 These appear to me to be (1) the ground colour, which may become 

 darker or lighter; (2) the development of melanism, either by a 

 general darkening of all the component colours of the coloration, or 

 by an extension of the area of the darker markings ; (3) joining up 



