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, Dg. 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. 



LITHOCOLLETIIXE. 



* LlTHOCOLLETIS, Z. 



LITHOCOLLETIS SORBI, Frey. Corfe ; bred plentifully from 

 mines in the under side of leaves of Mountain 

 Ash (Sorbus aucuparia) by E.R.B. in 1896. 

 (N.B. The imago emerges through the upper 

 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 aucuparia) 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 

 genii ine triguttetta among them, thus proving that his supposition was 

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



