Sj ffigtyetti Yorkshire fopi'dop/cra in iqoo. 



aristocrats from the vulgar mob :i by no moans easy task, and 

 the ubiquitous Agrotis exclamation is, Xy/op/iasia poiyodon, Tri- 

 pfucnii pronuba, Noctua xawthogvapha, ( 'ostniu I rapczina , and 

 other very common fry were uninvited, troublesome, and unwel- 

 come visitors to our sweets, while now, oven thev refuse to be 

 attracted by the alluring bait. 



The Sallows were not generally productive, and main of the 

 usual attendants were conspicuous by their absence or rarity. 

 I regret to note that our friend Mr. J. Sumner, to whom 



we were so much indebted tor material used in the compilation 



of the 1897 list, has since left Yorkshire, and in the present list 



only occurs as sponsor for the var. olivacea of Polia chu 



Light Traps do not seem to have been resorted to by the 



three entomologists possessing them, or, if so, with very bad 



results, as I have no records of captures; let us hope for better 

 things in iyoi and future years of the new century, as light, in 

 my opinion, is the means by which additions to our county list 

 will be made. 



In addition to the 1 2 questions on w hich I solicited information 

 in my 1897 list, pp. 160, 161, and 162, I would add another, viz., 

 dates of hibernation, where possible, of either larva; or images 

 of those species which live through the winter and place of 

 hibernation, and, with reference to the larvae, the age at which 

 they hibernate, whether ///, on, or away from the food-plant. 



On behalf of the Evolution Committee of the Royal Society, 

 I venture to make a special appeal to all Yorkshire entomologist s 

 for information respecting the progressive melanism of any 

 species of moths, but more particularly of the following: 

 Acidalia aversata, AnipJiidasys be hilar ia, Boarmia repandala, 

 Camptogramma bilinea/a, Gnop/ios obseura/a, Hemerophila 

 abruptaria, Hybcrnia progemmaria, Phigalia pilosaria, Acronycla 

 psi, Agrotis corh'cea, Aplecta nebulosa, Polia chi, Ve?iusia cambrica, 

 and Xylophasia poiyodon. The information required is as follows: 



Genus and Species. 



1. Which forms of the above species are now found in the 



district ? 



2. Which is considered the prevailing form ? In about what 



proportions are the different forms now found ? 



3. At what date do you believe the melanic forms began to 



appear in the district? 



4. When melanism first appeared in the district: 



(a) W r ere the darkest forms then found ? 



Naturalist, 



