THE FORMATION, ETC., OF A COLLECTION OF INSECTS. 297 



3. 



Types. 



a. Aberrations. 



h. Hermaphrodites. 



Seasonal Varieties of Type. 



a. Aberrations. ' ■ . 



h. Hermaphrodites. 



Geographical Varieties of Type. 



a. Aberrations. 



h. Hermaphrodites. 

 4. Seasonal Varieties of Geographical Varieties. 



a. Aberrations. 



h. Hermaphrodites. 

 Then follow — 5, Mimetic Varieties of Type; 6, Seasonal Varieties 

 of Mimetic Varieties of Type ; 7, Geographical Varieties of 

 Mimetic Varieties of Type, with their respective Aberrations and 

 Hermaphrodites ; and, lastly, 8, Hybrids. 



Each of the above is again subject to subdivision, such as 

 Melanistic, Xanthochroic, &c. 



The following are three specimens of the labels which I em- 

 ploy for the purpose of illustrating the degrees of variation : — 



la 



Ab. taras. 



2a 

 Ab. nelo. 



Var. alpina. 



The numbers and letters correspond with the list given, and 

 represent respectively Syrichthus malvce ab. taras {la), Pieris 

 rapce var. metra ab. nelo {2a), Hesj^eria comma var. alpina (mihi), 

 (3). I may here remark that I do not repeat the name of the 

 species in each sublabel. 



In a great many cases varieties and aberrations in one dis- 

 trict may be represented in another by a variety or aberration of 

 different value. As an instance we have the form lutescens 

 (mihi) of Vanessa c-alhum occurring on the Continent as a variety 

 (a seasonal variety), but in this country only as an aberration of 

 the first brood. In this relation I may remark that I follow the 

 practice of Dr. Staudinger in discriminating between varieties 

 and aberrations. In order to show the connection in this case 

 between the aberration and the variety, of the form from this 

 country, I prepare the label as below : — 



la=2. 

 Ab. lutescens. 



The sign la— 2 signifies that the form la is represented in 

 another district by a form of superior value (2). The series of 



