( « ) 



Exhibitions. 



The President exhibited a specimen of Colias, edusa var. 

 3, with the margins of the wings entirely dark as in the 

 male ; also a variety of Carterocephalus palaemon, with the hind 

 wings dark save for one conspicuous orange spot. 



Dr. T. A. Chapman exhibited a large series of Endrosx col- 

 lected during the last few years in the Western and Central 

 Alps, by himself, Mr. A. H. Jones, and especially by Mr. Tutt ; 

 E. roscida, which is a very distinct dwarf form, and from 

 frequenting marshy flats, must live on lichens growing in such 

 localities and not on stones as the others do ; E. irrorella, which 

 should be the rarest species in the Alps judging by the com- 

 paratively few specimens met with ; E. aurita, in very great 

 variety, including a good many specimens that are called 

 kuhlweni, var. alpestris, none however reaching the type of 

 kuhlweni, but sufficient to bring very nearly to a certainty the 

 question whether kuhlweni is simply an extreme form of aurita. 

 — E. aurita and E. irrorella, said Dr. Chapman, are very near 

 together, no point in their anatomy being absolutely distinc- 

 tive, while the genitalia are practically identical ; E. irrorella 

 always looks much slighter, being lighter scaled and the hairs 

 short and smooth. It always has a yellow patch on the 

 mesothorax. The venation is also distinctive, yet individuals 

 of each species approach each other completely in each of the 

 distinctive items of the venation, but never in all of them, 

 so far as examination of a number of specimens goes. 



The specimens exhibited consisted of 24 roscida from two 

 localities, 22 irrorella from eight localities, and 204 aurita 

 from 23 localities. Except irrorella from England, Finmark, 

 and the Tyrol, and a few aurita from the Tyrol, all were from 

 the Western Alps of Switzerland, Italy, and France. Examples 

 from each locality when sufficiently numerous usually have a 

 special facies. Some, as all those from Arolla, radiate \ those 

 from Bourg St. Maurice are without radiate forms, a ad so on. 

 Some are more yellow ; others deeper orange ; some more 

 mixed. Elevation tends to produce radiation, but no other 

 general conclusion as to the effect of height, latitude, or 

 longitude seems fully justified by the specimens. 



