LEPIDOPTERA OF THE ISLE OF PURBECK. 77 



E.R.B. in Sept., 1892, but it was too late to 

 find either larvae or pupae. It seems confined 

 to the chalk, as I have frequently searched 

 for it on other soils in Purbeck, but always 

 in vain. 



Elachista, Stn. 

 Elachista gleichenella, F. Corfe ; taken in " Scotland " 

 rough field by E.R.B. in June, 1890. 

 ,, cinereopunctella, Hw. Winspit (near Worth) ; 



taken on June 5, 1889. (E.R.B.) 

 ,, SUBNIGRELLA, Dcj . Corfe ; a few specimens 



taken by E.R.B. 1887-1893. Worth; one 

 taken in 1889 by E.R.B. Its food plant, 

 Bromus erectus, is rare in Purbeck. 



LITHOCOLLETID^. 



* LiTHOCOLLETIS, Z. 



LiTHOCOLLETis SORBI, Frey. Corfe ; bred plentifully from 

 mines in the under side of leaves of Mountain 

 Ash {Sorbus aucujMria) by E.R.B. in 1896. 

 (N.B. — The imago emerges through the upqxr 

 surface of the leaf, as pointed out by 

 Frey.) 

 „ TORMiNELLA, Frr. (mespilella, H.). Corfe ; 



bred from mines on the underside of leaves of 

 Mountain Ash {Sorbus aucwparia) by E.R.B. 

 in 1890. Studland ; bred from quince 

 {Cydonia vulgaris) by Rev. C. R. Digby in 

 1884 and 1885. 



* LiTHOCOLLETIS TRiGUTTELLA, Stn. Corfe. From a careful study 

 of the unique specimen in the Douglas collection, E.R.B. had made a 

 note in the spring of 1892 that it was almost certainly a queer variety 

 of Lith. faginella. Three weeks later he looked through the long 

 series of faginella bred by him April 27 — May 12, 1891, and found a 

 genuine triguttella among them, thus proving that his supposition was 

 correct. Douglas' specimen is a male, the Corfe one a female. 



