ii4 



THE YOUNG NATURALIST. 



[May, 



3-J ins. and females from 3 ins. to nearly 3-I ins. The late autumn 

 emergences are smaller type, about the average size of our English 

 form. It seemed to me desirable to obtain measurements of as many 

 caught imagines as possible, and also from those gentlemen who had 

 bred the insect from Kent, Essex, Lancashire, &c. These data cer- 

 tainly go a long way to prove that the bulk of 1888 imagines were in 

 all probability from a continental immigration. 



Continental D. galii Females, July emergence, measure 3ms. 



to 3fins. 



„ „ Males, „ „ 3 ins. to 3^ins. 



Caught imagines (18) St. Margarets, Females, 3^ins. to 3§ins. 

 „ ,, ,, Males, 31ns., one larger not 



measured. 



,, ,, Kingsdown, Females, 3ms. full. 



,, ,, Dartford, Males, 3ms. full. 



,, ,, Stoney Stratford, Females, 3ms. full. 



,, ,, Aberdeen, Females, 3}ins. 



,, ,, Dublin, Males, 2 T 7 -ins. 



,, ,, Dundee, Males, 2-fins. 



Thus it will be seen that all the measurement I have been able to 

 obtain, with the exception of the two males, one from Dublin and one 

 from Dundee, all measure at least 3ms., and up to 3fins. 



Now, from a large number of specimens bred from English fed 

 larvae, very few indeed reach 3ms. Mr. S. J. Capper very kindly 

 made full enquiries in the Liverpool district, but could not get infor- 

 mation on any caught imagines in 1888, but from himself and friends 

 he has supplied measurements of the bred examples. 

 Bred from English fed larvae by Mr. Capper : — 



Liverpool, one exceptionally large female 3^ins. 



,, average females, 2-fins., smallest 2-|-ins. ; largest 

 males, 2ins. 10 lines, smallest 2ins. 4 lines. Mr. 

 Capper remarked, " very few are 3ms ! " 



Bred from Deal larvae by W. H. Tugwell, one female is 3-J.^ins., very 



few are 3ms., average 2fins. 

 ,, „ males, largest 2-fins., average 2-Jins. 



,, Essex by Mr. J. A. Cooper, females largest 2-fins. 

 „ ,, males, largest 2§ins. 



These figures clearly show the caught imagines average fully f of 

 an inch expanse of wing more, and proportionally robust too, than 

 any bred from English fed larvae. Some may say, " Ah ! but bred 

 insects are often smaller." To this I will reply, That quite a large 



