80 THE ENTOMOLOGIST. 



A CONTEIBUTION TO THE LIFE-HISTORY OF 

 BRENTHIS FRIGGA. 



By W. G. Sheldon, F.E.S. 



I'hoto H. Main 

 Egg-shell of Brcnthis frigga, magnified 20 diameters. 



So far as I am aware, the only particulars that are known of 

 the earlier stages of this species are that a lepidopterist named 

 Schilde in 1871 obtained ova from captured females, and found 

 that the resultant larvre would feed upon Rubus chamcBmorus, 

 and that they would also eat birch. These larvae were not 

 reared. 



On July 12th last I obtained several worn females at Laxelv, 

 in the Porsanger Fjord, which, when confined in the sun under 

 gauze, deposited ova thereon freely, in preference to laying 

 them on the various plants growing in the locality in which the 

 females were captured, and which including Ruhus chamamorus , 

 Vaccinhun of three species, sallow, birch, and Empytrum nigrum, 

 I had placed under the gauze. Of these ova I kept the major 

 portion, but forwarded some to Mr. H. Main, to whom I gave a 

 list of all the plants, found where the females were captured, that 

 I knew the names of. 



The first of my larvae emerged on July 28th, and the 

 remainder on the following two days. I was then journeying 

 home, but had a supply of R, chamaniorus with me, and 

 supplied the larvae with leaves of this plant, together with those 

 of raspberry, which I found growing wild at Trondhjem, some- 

 what to my surprise and greatly to my concern, the larvae — 

 although one or two slightly nibbled the leaves of both these 

 plants — would not eat them at all freely, and by the time I got 

 home on August 4th they were all dead, or nearly so. Fortu- 



