Manchester Memoirs, Vol. lix. ( 1 9 1 5 ), No. 9. 9 



I have not yet had an opportunity of investigating the 

 spring generations of our species (77. tullgreni), and it 

 may possibly have a slightly different life history to the 

 closely allied one with which Borner deals. But unless 

 there is a third summer generation, to correspond with 

 the young larvae found in June last and the mature 

 females taken at the end of August, it appears to me that 



^oA.^v^y 



Text -fig. 4. — Hamamelistes tullgreni. 



Hiemalis, x 48. 



With portion of margin further enlarged. 



the aestivales I, and the sexuparae must be the progeny of 

 the hiemalis and therefore parallel races, as in analogous 

 cases of Chermes. The larvae and mature ? s found by 

 me were certainly not parallel to the winged generation, 

 as, according to Borner, they should have been in H. betu- 

 linus. I hope to be able to get further light on the subject 

 of the spring and summer generations during the course 

 of the year, as I have hiemales under observation. 



