lOG r October, 



I haye taken this species on the Deal Sandhills for four years 

 (one or two being captured in 1884), along with the common L. 

 marmorea. 



Last winter I was much struck with the variation in my series of 

 sandhill Litce, and the kind offices of friends in naming very similar 

 types as different species, coupled with the fact of a new species 

 (semidecandrella) having just been differentiated, puzzled me to such 

 an extent, that I put my difficulties (in a very crude form, certainly) \ 

 into print (Entom., xx, 28). As a result, I at once got the aid of 

 several of our best entomologists, to whom my insects were in many 

 cases new. Thanks to Messrs. Staiuton, C. Gr. Barrett and Threlfall 

 I have partly extricated myself. My Nos. 1 and 2 (Entom., xx, 29) 

 wdll be referred to llandulella, 3 and 4 to semidecandrella, whilst my 

 black one may be a var. of marmorea. 



May I add, that those who have a series or partial series of 

 Knaggsiella, other than those originally taken by Mr. Barrett, would 

 do well to scrutinize them carefully. From all I can gather these are 

 still unique as British, and the few he captured will not account foi" 

 all I have seen marked on exchange lists, &c. Those who have 

 Knaggsiella from the south coast will probably find them semidecan- 

 drella, with an occasional hlandulella. The species are all distinct 

 enough, when one has had their special characters pointed out to him, 

 and sees them side by side, but one rarely has this chance. 



Eayleigh Villa, Westcombe Park, S.E. : 

 September 1th, 1887. 



ON THE TRUE DISTINCTION BETWEEN LITHOSIA COMPLANA 

 AND L. LURIDEOLA. 



BY ARTHUR G. BUTLER, F.L.S., F.Z.S., &c. 



Whilst re-arranging the Museum collection of LitJiosiidce, in order 

 to incorporate the Zeller and other collections, I have had occasion to 

 look up the original figures and descriptions of all the European 

 species. I have also found it necessary to examine separately every 

 specimen placed by Prof. Zeller under each species, and I must say 

 that I have been not a little surprised at the confusion which existed 

 in the series of specimens associated under the various species by that 

 eminent Lepidopterist. 



