6o MAINE AGRICUIvTURAL EXPERIMENT STATION. I914. 



Macrosiphum sp. 



Fig. 28. 



A distinct species of aphid was collected with (20-12) on 

 currant leaf. A single winged viviparous female was preserved 

 and as this may have been an accidental specimen resting on 

 currant, no pains is taken to describe it here. The antenna, 

 which is shown in Fig. 28 differs from lactiiccc in having V 

 with a row^ of sensoria. and IV thickly studded instead of with 

 single row as in lactiiccu. (203.-12). 



Schisoneura ulmi (fodiens). 



Collections of a woolly aphid curling the leaves of English 

 elm, Ulmus campestris, were made in Maine during the sum- 

 mer of 1913. The life history of this species as worked out by 

 European entomologists has been found to include a migration 

 to currant and gooseberry bushes upon the roots of which the 

 summer generations feed. Fall migrants are produced which 

 return to the elm and the insect over winters on this tree in 

 the egg stage. Fig. 32 shows the work of this aphid on elm. 

 We have as yet no record of this insect as occurring upon 

 gooseberry or currant in America, but the summer stages will 

 no doubt be found to infest these plants here as in other coun- 

 tries. 



A further discussion of this species is to be found in Bulletin 

 220 of this Station. 



Note. All figures of anlennae and cornicles, except 12 and 13, are 

 drawn to the same scale. 



