( “xxzvit *) 
‘aberrations owe their diminutive stature to a deficiency of 
‘food, and this would show as strongly in the scales as in 
‘‘other structures. Reference to these small specimens are 
“scattered through many Entomological Magazines, and 
‘« these records extend over many years. We find such in ‘ The 
‘Northumberland and Durham Catalogue,’ by Mr. Wailes ; 
‘‘in Newman’s ‘ British Butterflies;’ in the ‘EK. M. M.,’ 
‘¢ vol. xxv., by Mr. C. G. Barrett, etc. Mr. T. D. A. Cockerell 
*«(¢ Kntom.,’ vol. xxii., p. 176) calls this small form Fuchloé 
‘* cardamines var. minor, a name I presume that will have to 
‘‘sink in favour of turritis, Och. 
‘« Personally, however, I am quite open to conviction and 
“shall be pleased to agree with Mr. Newnham as soon as I 
‘‘am satisfied as to its specific distinctness, even by one 
‘single indubitable character. 
“To exemplify the difference in size which cardamines 
‘“reaches, even in the same locality, I exhibit three specimens 
‘captured in Chattenden. The large female (al. exp. 20625 
‘‘inches) was taken there, May 22nd, 1888. The small 
“‘female (al. exp, 1°25 inches) and the male (al. exp. 1813 
‘‘inches) were both taken on May 28th, 1892. The speci- 
‘men of hesperidis is rather larger than my small female, 
‘‘being 1°313 inches.” 
Mr. Tutt also exhibited specimens of Noctua dahlii, and 
read the following notes : 
‘The study of the variation of our Nocrum.is certainly one 
“of the most interesting pursuits of British Entomologists. 
‘‘The specimens exhibited to-night are those of Noctua dahlii, 
‘a species which shows not only a considerable range of 
‘sexual dimorphism, but also of variation according to 
‘‘geographical distribution. Of those exhibited twenty 
‘“specimens were captured in Delamere Forest by Mr. Geo. 
‘Day of Knutsford. ‘These specimens, as will be observed, 
‘¢ show the usual sexual dimorphism which is so conspicuous 
‘in Great Britain. This dimorphism is well marked in the 
‘‘specimens which I have from Aberdeenshire, Yorkshire, 
‘‘ Hgsex, and other localities, the males being of a bright 
‘‘chestnut colour, the females being of a purplish colour 
‘‘with a wide range extending from red with a purple tinge 
