A NEW MOTH. 121 



thin, and cylindrical, dull reddish-purple, with the spaces between 

 most of the segments shewing paler, and of a pinkish hue, but 

 greenish-white between the first 4 segments : no dorsal or sub- 

 dorsal lines or spots, but there is one paler pinkish stripe along 

 each side in the region of the spiracles. Anal segment with a 

 rather small, horny, polished, brownish-black plate : ventral surface, 

 and pro-legs, reddish-pink ; anterior legs black, and highly 

 polished. 



The larvae live on the surface of, and below, the sand in very 

 long silken tubes coated with sand, and attached to half-buried 

 stems of Thymus serpyllum and Lotus corniculatiis, upon which 

 they feed. 



I was unable to discover the position of the pupa, but it seems 

 probable that it is enclosed in a rather long cocoon just below the 

 surface of the sand, as in the case of B. variella. 



The perfect insects emerged from July 3rd to 12th, 1887. 



In order to obtain some larvae of B. variella for the purpose of 

 comparison with the above, I visited the locality for the species on 

 May 16th, 1887, and secured a good supply of them. These larvae 

 were first discovered by the Rev. C. R. Digby at Studland in 

 April, 1883, living on the surface of, and below, the sand in very 

 long silken tubes coated with sand, and attached to half-buried 

 twigs of Calluna vulgaris and Erica cinerea, upon which they feed ; 

 and, as no notes on them have yet been published, with Mr. 

 Digby's permission I append a description taken on May 17th, 

 from which I hope that the chief points in which they differ from 

 the larvse of B. siccella will be clearly shewn : 



Length, 5 6 lines. The narrow, pointed, and much flattened head 

 is black, horny, and highly polished ; it is retractile into the 2nd 

 segment, which is much broader, and covered by a horny, polished, 

 dark brown plate. Body very long, thin, and cylindrical, dull 

 purplish-brown, with no dorsal or subdorsal lines or spots, and not 

 showing paler between the segments there is a single stripe, 

 rather lighter in colour than the body, along each side in the region 

 of the spiracles. Anal segment shining dirty yellowish-brown, 



