Manchester Memoirs, Vol. lix. (191 5), No. 9. 



5 



during the winter 1 and they (or possibly their descendants) 

 would have produced the generation found by Tullgren in 

 June. The following scheme may make the life cycle of 

 this species clearer : — 



Poplar. 



Stem-mother 



forms gall 



1 



I 



Winged migrants 



(in Summer) 25.V11. 13. 



1 



1 >'_. 



6.ix. 14. — 

 io.x.14. 



Sexuales 



Ranunculus. 



' "l 



Apterous? 1 5-vii. 14. 



Sexupara Apterous exile I. 

 <_ _ J 9-X.I4- 



Exile II. (hiemalis). 

 larvae 

 9.X.14. 



Winged ? 

 (? Exsul alata). 



(ii.) Hamamelistes Inllgreni, Meijere. 



This species was described by Tullgren' 2 as H. belulae, 

 Mordw., but it has been pointed out by Meijere (6) that 

 there are certain points of difference between Tullgren's 

 figures and description and those of Mordwilko (8). He 



1 Since the paper was read Mr. Coward lias sent me adult specimens 

 from Ranunculus. (26.iii.15.) 

 '-' See Reference (5), p. 51. 



