AT CANNES AND MENTONE IN 1867. 227 



second segment with a black subcutaneous plate ; anal segment with 

 a small blackish plate. Legs 16 ; anterior legs blackish. 



A larger larva was more distinctly mottled with pale grey, and 

 had a whitish spiracular line. 



It mines the leaves of Cistus monspeliensis, making an elongate 

 blotch, which is slightly puckered. The upper end of the mine is 

 free from excrement, which seems all collected at the lower end. The 

 larva moves from leaf to leaf ; and when full-fed it quits the mine, 

 and, attaching itself to the edge of a leaf, changes there to a naked 

 pupa, which is only attached by the tail ; the head-end and the 

 middle are entirely free from the leaf, not even fastened by a silken 

 girth, thus reminding us of the pupae of some of the Pterojphoridce. 



When I saw the singular pupa, I regretted that I' had not collected 

 more of these larvae. I was fortunate, however, in rearing four 

 specimens of the imago, three of which appeared April 7th (only 

 two days after I had returned home), and the fourth on the 9th 

 April. 



I should not be at all surprised if this should prove to be the 

 insect described by Staudinger as Elachista piperatella (see ante, 

 p. 161) ; and possibly his name may eventually have to be adopted 

 for it ; but as it certainly forms the type of a new genus, I will in 

 the meantime give it the specific name of dsticolella. The generic 

 characters of the imago consist in the rough head, the short palpi, 

 and the form of the anterior wings, which are more elliptical, and 

 have not the posteriorly expanded appearance of an Elachista. The 

 neuration I have not yet investigated. 



The species may be thus briefly described : 



Exp. al. 4 lin. Head sparingly clothed with erect pale grey hairs, 

 face smooth, dark grey. Palpi dark grey, very short. Antennae 

 dark grey, with paler annulations, nearly as long as the anterior 

 wings. 



Anterior wings rather dark grey, with no markings, but with 



Q2 



