14 



THE APPLE LEAF HOPPER 



m 



'¥\ 



oMii 



Fig. 4. Kkk blisters of is'. hkiU. much 

 enlargetl. OiiginaL 



first found in abundance September 

 23rd upon the smaller branches of 

 apple trees in an orchard eight 

 vears old. located next to an alfalfa 

 field, which was very heavily in- 

 fested with E. inali during the sum- 

 mer. Each pocket or blister con- 

 tained a single egg, apparently 

 fresh. At that date the hoppers 

 were less abundant in this alfalfa 

 field than they had been, and had 

 l)een growing markedly less 

 throughout the latter half of Sep- 

 tember. This field was swept with 

 a collecting net as late as Xovem- 

 l)er 4th. and at no time was E. mail 

 found in abundance, only a few specimens being taken at a sweeping. 

 This is to be regarded as evidence that it does not winter in the adult 

 or any other but the egg stage, since 

 none w'ere found November 4th. 



The al:)Ove mentioned blisters, 

 containing fall laid eggs, were found 

 throughout the orchard referred to. 

 but were apparently most numerous 

 on the side adjoining the alfalfa field. 

 They were most plentiful on the sec- 

 ond and third year's growth from the 

 present, according to Dr. Franklin's re- 

 port, though he foinid them occasion- 

 ally on the growth next to the present 

 year's growth and they were often 

 found to be rather numerous on the fifth year's growth from the pres- 

 ent. Only one egg blister which ap])eared to be that of E. mali was 

 found on last season's growth. 



On November IS a considerable amount of three-year-old nursery 

 stock was carefully examined and measured and the winter egg blisters 

 found upon it. It was impossible to distinguish these blisters from 

 those found on the a])])lc trees in the orchard by the alfalfa field, pre- 

 viously described in detail. ( )n this nursery stock, however, these 

 blisters were considerably more numerous on next to the present year's 



Fig. 5. Egg of E. mali. di.s.socted 

 from blister, much enlarged. Origi- 

 nal. 



