1 30 Saunders* List of Diurnal Lepidoptera. 



the appearance of two red lines beyond the visible red of the 

 solar spectrum. These new metals have since been found widely 

 distributed but in very small |)roportions. Mr. Grand eau, by the 

 evaporation of several thousand litres of the waters of Vicliy, col- 

 lected about two grammes of the double chloride of platinum and 

 caesium, and a still smaller proportion of the same salt of rubidi- 

 um. A larger amount of both these metals is present in the 

 waters of Bourbonne-les-Bains, and the same chimist has found 

 them in different specimens of lepidolite, in the refubC of salt- 

 petre manufactories, and elsewhere. s. P. R. 



ARTICLE XL — List of Diurnal Lepidoptera collected (unless 

 otherwise specified) in the immediate vicinity of London* 

 C. W. By W. Saunders. 



(Read before the Natural History Society.^ 

 In naming these insects, preference has been given to the family 

 names in the Smithsonian Catalogue, as being the most reliable and 

 easily accessible authority, but where long usage has popularized 

 certain family names they will be found enclosed in brackets. 



Papilio turnusj Linn. — Not uncommon. 



" troilus, Linn. — Common. 



" Philenor, Linn. — From Rev. Chas. J. S. Bethune, Cobourg. This 

 fine insect taken in such numbers at West Flamboro' by 

 Mr. B. in June 1858, See Canadian Naturalist for Au- 

 gust 1858, is not uncommon about Toronto, and has also 

 been taken near Woodstock. 



" Asteriasj Fab. — Common everywhere. 



" Thoas, Linn. — This splendid butterfly, usually considered pecu- 

 liarly southern, has been taken in Canada by the Rev. 

 Dr. Sands, of Chatham, C. W. Several years since he 

 captured three specimens on the Mersey, one of which 

 is now in possession of the Lord Bishop of Huron. The 

 Rev. Dr. states that they are not uncommon in that lo- 

 cality, and that they are found through several townships.* 

 He has repeatedly seen specimens on the wing, since the 

 captures above alluded to were made. Although I have 

 no Canadian specimen of P. Thoas the fact of its un- 

 doubted occurrence in Canada is a matter of too much 

 interest to entomologists to allow it to continue unno- 

 ticed. 



* P. thoas has also been seen on the wing near Port Stanley, by a res- 

 ident collector, but the insect being exceedingly difficult to capture, he 

 has never succeeded in taking one. 



