2^^ [November, 1887. 



Occurs along the South Coast in Dorset and the Isle of "Wight, 

 also in Arundel Park, Sussex. The first specimens captured in England 

 were taken in October, 1866, at Ventnor, by Mr. C. W. Dale (vide 

 Ent. Ann., 1873, p. 49). 



4. insecurellus, Stn., I. B., 23 i, Man., 2, 397 ; Hein., 410 ; = Illigerellus, Stn., 

 Zool., 1848, p. 2035 ; = dentosellus, H.-S., 967, v, p. 208. 

 Fore-wing short and stumpy, the costa decidedly shouldered at one- third from 

 the base ; pale whitish-grey, dusted with darker, especially at the base of the costa. 

 A greyish-yellow fascia rises on the inner margin before the middle, and runs widen- 

 ing nearly perpendicular to the costa ; from the anal angle another yellowish-grey 

 fascia runs obliquely inwards, and sometimes unites with the first near the costa ; 

 beyond it towards the apex are two other indistinctly margined yellowish-grey 

 blotches ; two small black dots, one beyond and in a line with the other, lie in the 

 centre of the wing. The apical two-thirds often much obscured by a dark grey 

 cloud ; head pale grey ; teeth of scales black, the first the larger, at the base of the 

 first fascia, the second halfway between it and the anal angle ; the dividing lines of 

 the fringes unbroken below the apex, not divergent, and continued quite to the anal 

 angle. Y e, VI b, and VII e, VIII. 



Larva sluggish, glossy, yellowish, with distinct brown spots ; head 

 black ; plate on 2nd segment dingy, posteriorly with a sharply-defined 

 black point next the dorsal line ; dorsal line narrow, brown ; sub-dorsal 

 light brown, irregular, especially on the upper edge ; anal flap with 

 blackish plate ; legs black externally. On Thesium humifusuon, at first 

 mining out the small leaves and feeding down inside the stalk, after- 

 wards attacking the leaves externally ; the larvse of the summer brood 

 also feeding on the flowers and green seeds. Pupa among the matted 

 roots of the food-plant, or in moss growing round it. The spring 

 brood feeds up in April and May, the second in July. 



Until ]884, the only known British specimens were those taken 

 in 1847 by Mr. Stainton and others at Stoat's Nest, beyond Croydon. 

 In 1884, however, Mr. Fletcher captured a specimen on the chalk 

 downs of the Isle of Wight, and I found another near B-iddlesdown 

 in Surrey, Mr. Stainton's notice (Ent. Mo. Mag., xxi, p. 255) indi- 

 cating Thesium humifusum as the probable English food-plant, led the 

 next year to the discovery of the larvae in both localities, and they 

 have since been taken in plenty on the Dorset Downs by the Rev. C. 

 R. Digby and Mr. Bankes, and Mr. Fletcher has observed them in 

 Sussex, in Arundel Park, and near Eastbourne. 



Mr. Stainton in the Manual mentions three tufts of scales on the 

 inner margin, a peculiarity which characterizes a continental species, 

 iniquellus, Wo., only. 



The second genus, OcJiromolojpis, of which the only known species 



