PCECILOSOMA LUTEOLUM. 209 



itself as lias been done by Costa), regarded as a Pcccilo- 

 soma, although it differs considerably from the other 

 species of that genus, not only in coloration, but also 

 in form. From Selandria it differs in the structure 

 of the antenna3, of the lanceolate cellule, and in the 

 neuration of the hind wings. 



The larva feeds on LysimacJda vulgar is, and, accord- 

 ing to Kaltenbach, on Anagallis arvensis, during 

 August and September. It is cylindrical, glabrous, 

 save a very short white down on the head. The head 

 is pale yellow, with a large black mark on the vertex, 

 narrow before and behind, and extending from the 

 back of the head till it reaches the level of the eyes, 

 which are black. Mouth piceous ; mandibles darker. 

 Body dark green to the spiracles ; below these the 

 colour is white. Legs white ; on the femur is a pale 

 fuscous line ; and there is also a fuscous line over the 

 ventral legs. The skin is in folds, the folds being darker 

 at the junction of the segments. 



At the last moult the head loses the black mark ; 

 the colour of the body becomes paler, and assumes a 

 yellowish tinge, besides becoming more shining. 



The larva when not eating remains curled up in a 

 ring on the lower side of the leaf. It does not spin a 

 cocoon. 



Kaltenbach says that he found the larva also at 

 the beginning of July, and hence suspects that there 

 are two generations in the year. 



I believe luteolum will prove to be a common species 

 in the south. There are specimens in Stephens' s 

 collection, and it has been taken by Mr. Dale at 

 Glanvilles' Wootton, by Mr. Bridgman at Norwich, and 

 by Mr. Fletcher at Worcester. 



It has a 'tolerably wide European distribution, being 

 found in Sweden, Germany, Holland, Italy and 

 Syria. 



VOL. i. 14 



