1892.] 



THE BRITISH NATURALIST. 



254 



green laterally ; dorsal line whitish, finely bordered with dark grey ; 

 wing-cases yellowish-green ; antennae and legs showing up darker ; 

 a pinkish tinge just above the wing-cases. July" (" Entomologist," 

 Vol. XV., p. 104). 



Larva — The larvae of this species may be readily found in May 

 and June on the leaves of Inula dyseutevica, or as it is sometimes called 

 Conyza squarrosa. The larva was first described by Mr. Gregson who 

 writes : — " The larva feeds in May and June on the leaves of Conyza 

 squavvosa, sometimes quite defoliating and thus destroying the plant ; 

 it is somewhat onisciform, of a light whitish-green colour and hairy ; 

 whan full fed it is about six or seven lines in length, with a broad 

 pmkish dorsal stripe ; the head is obtuse, and the anal segment 

 narrow" ("Entomologist," Vol. 111., p. 201). The larva was then 

 described in detail by Mr. Porritt as follows: — "The larva from 

 which I took down my notes was received, amongst some of those of 

 Ehulea cvocealis feeding on InuLa dysenterica, from Mr. W. H Grigg, 

 of Bristol, June 15th, 1875. It was full-grown, five-eights of an inch 

 in length, and of average bulk in proportion. Head globular and 

 polished, smaller than the second segment, into which it can be 

 partially withdrawn. Body of nearly uniform width throughout, but 

 tapering slightly towards the posterior extremity ; it was clothed 

 rather thickly with short hairs. Ground colour bright yellowish-green, 

 head pale-green, the mandibles brown ; throughout the entire length 

 of the dorsal erea is a broad pink stripe, edged on each side with a 

 narrower purplish one, w^hich is again edged with a fine whitish line. 

 Ventral surface uniforiuly pale green. The hairs on the dorsal area 

 are dark-brown, those on the sides whitish " (" Entomologist's 

 Monthly Magazine," Vol. XIII., p. 236). It was again described by 

 Mr. South and figured on its food-plant (" Entomologist," XV., 

 p. 104"). Stainton says of the larva :—" Larva on Inula dysenterica 

 and Conyza squarrosa in June and July " (" Manual," II., p. 443) ; 

 whilst Dr. Jordan writes : — " The only Swedish, and the only British 

 species of this genus is 0. litliodactylns. In Sweden, the larva feeds 

 on Inula salicifolia ; in England, on the well-know^n Inula conyza (or 

 as it is sometimes termed, Conyza squarrosa and /. dyseutevica " 

 (" Ent. Mo. Mag.," Vol. VI., p. 125). 



Mollusca . — N o t e s . 



(Conti)iucd from Page 211.) 



Among other causes infiuencing variation in a greater or less degree, 

 may be mentioned Massing, Mr. W. Jeffery mentions taking the var. 

 favcscens of Spli. corncuiu in a small stream, under water njoss, and 

 other vegetation, "literally in masses, and may be taken up by tlie 



