sA I ftFarcb 



my opinion on these two species may not be so "manifestly erroneous" 

 as M. Oberthiir supposes. He further states that this matter does 

 not seem to him disputable. I think he is not infallible. 



Superficially the resemblance of the Campiglio Erehia with E. 

 melas is great, principally because of the conspicuous ocelli on the hind- 

 wings which misled M. Oberthiir and others and caused them to take 

 it for melas. After a careful examination of the form of the hind- 

 wings, the antennae, and the coloration of the under-side (particularly 

 of the female), and an exact comparison with the typical E. glacialis 

 and melas, I and my friend Herr Calberla have no doubt it is a local 

 form of glacialis. Herr Calberla observed this Campiglio form flying 

 and captured a large number of specimens last year, and he will give 

 in the "Iris," vol. ix, of this year, the precise, and, as I think, the 

 convincing reasons for his and my opinion on this form. I do not 

 say that the opinion of M. C. Oberthiir and Mr. F. C. Lemann, 

 (page 4) is " so manifestly or curiously erroneous " as they say of 

 mine. It may be that E. glacialis and E. melas are the variable 

 forms of one species (surely they are derived from one species), the 

 first is the form from the European Central Alps, the second from 

 the mountains of Hungary and the Balkan Peninsula. E. Lefehvrei 

 is the form from the Pyrenees, E. Sewitsoni from the Caucasus. 



As a very similar or the same form to that taken at Campiglio 

 was named and figured nearly 100 years ago, the name Nicholli, 

 Oberthiir, sinks to a synonym. 



Blascwitz, Dresden : 



February, 1896. 



AN EXPERIMENT BEARING ON THE NUMBER OF 



LARVAL INSTARS, AND THE DISTINCTNESS OF LARVAL AND 



PUPAL INSTARS IN LEPIDOPTERA. 



BY T. A. CHAPMAN, M.D., F.E.S. 



Some half dozen years ago I ha^ some ova of Agrotis comes, var. 

 Curtisii, and when they reached their last skin, I placed some on a 

 diet of Arbutus unedo, the date being about December, the object 

 being to see whether different diet would produce any effect on 

 coloration. 



In fact, the Arbutus leaves proved very dry, and though the larv» 

 ate them, they did so sparingly, and were in truth starved. So soon 

 as this was unquestionable, or, perhaps, not quite so soon, I restored 



