82 THE entomologist's recokd. 



apart. Roughly speaking, it may be said that if the distance between 

 the points is more than one third of the width of the abdomen, the 

 specimen is 0. dilxtata : if less than one third, 0. christiji. In the 

 sketch below, fig. 1 shows the terminal segments with hairs undisturbed; 

 figs. 2 and 3 show the terminal segments with hairs brushed back 

 exposing the points, far asunder in fig. 2, (>. dilutafa, near together in 

 fig. 3, 0. cliriatyi. 



Some further Notes on the Life=History of Lycaena arion. 



By The HON. N. CHARLES ROTHSCHILD, M.A., F.L.S., F.E.S. 

 Since the appearance of our first note on this species in this 

 year's Entoviolof/ist's liecord, Mr. Herbert Ashby has forwarded some 

 remarks which seem to demand further investigation on the lines he 

 indicates. Mr. Herbert Ashby has pointed out that it is possible that 

 the young larvae of L. arion, after their third moult, feed on the 

 nodules which are formed on the roots of furze, and other Ler/taninnsae. 

 If this be so, the absence of furze in many localities where this insect 

 occurs would be immaterial, as other leguminous plants grow there. 

 The idea would naturally suggest itself to investigators, that the young 

 larvae might possibly burrow in the dehisced seeds of furze or some 

 other leguminous plant, but this is apparently not the case, as minute 

 search has so far failed to detect them, it is, however, just possible 

 that they may have been overlooked. 



Lepidopterology/' 



We have in English no single word to express the study of the 

 Lepidoptera, and the sooner we adopt the word " Lepidopterology " 

 the better. The word is as good English as French, and since its 

 adoption some years ago by M. Oberthiir, it must have become quite 

 an ordinary French word. We place it, therefore, at the head of this 

 communication. 



The Entomoloffist's liecord assumes as an alternative title, the 

 " Journal of Variation," but an examination of its contents hardly 

 justifies its claim to do so.f If we turn, however, to M. Oberthiir's 

 Etudes de Lepidopterolof/ie Cotnparee, we find a magnificent work, 



* Etudes de Lepidopterologie Comparee, par Charles Oberthiir, Fasc. iv., p. 

 691, pi. 30, and Fasc. iv. bis, p. 47. 



t We most strongly dissent from the statement made by our worthy colleague. 

 Even a casual investigation of the contents of the previous twenty-two volumes of 

 the Record will prove the contrary. — H.J.T. and G.W. 



