( Ixxxi ) 



yellowish, the continental much darkei-. This is a species of 

 which I have had large numbers, both in England and 

 Germany. In Berlin it is one of our commonest Hadenas, 

 and I have seen many hundreds on a single night. Although 

 this was one of the first insects in which I observed the 

 difference between the English and continental form, and I 

 have been constantly on the look out for light forms, the 

 fifth specimen in the continental row is the lightest observed. 

 As will be seen it is a good deal dai'ker than the darkest 

 English form. During the last five years I have certainly 

 seen many hundreds of this species on sugar here. 



" Iladena lithoxylea. — The English form is very pale with 

 very indistinct markings, the continental have a greyer tinge, 

 owing to a general diffusion of the wings with whitish-grey 

 scales ; the markings are also large and more distinct, the 

 hind-wings much more suffused. This is also a common 

 insect both in England and Germany. 



" Hadena basilinea. — The English form is almost unicolorous 

 pale fawn ; the continental mvich more richly marked and 

 altogether a handsomer insect. I have never taken this 

 species commonly although it seems to occur everywhere. 



" Miselia oxyacanthse. — Here we are confronted with a 

 double problem. Of the typical form, the continental tends to 

 be somewhat darker than the English, the paler markings 

 being more distinct, but curiously enough the dark English 

 variety cajnicina does not occur on the continent as far as 

 my experience goes. Further testimony to this effect is 

 afforded by the fact that all German entomologists when 

 looking over my collection have always called attention to it 

 as something new to them. 



'■'• Bryohota pi'otea. — Continental specimens are much darker 

 and dingier than English. The pretty English forms with 

 white and rosy patches are quite unknown. 



" Pachnohia rubricosa. — The English form of this insect is 

 so distinct that it is known as var. rufa on the continent. 

 I have taken large numbers of this insect both in England 

 and Germany, and have bred both forms on two occasions. 

 Althou.gh I have had occasional dai-k specimens in England, 

 I have never seen a red form on the continent. The result 



PROC. ENT. SOC. LOND., IV. 1906. F 



