30 



FARMERS BULLETIN 804. 

 THE GREEN CURRANT APHIS. 



A species which ma}' be called the green currant aphis has for 

 years been confused with the currant aphis, which it resembles 

 closely. The wingless forms of the present species are green, whereas 

 those of the currant aphis are yellowish. The life history, so far as 

 is known, is very like that of the currant aphis and the two forms 

 often may be found on the same leaf. 



Fig. 



, — The curraut aphis : Injury to currant foliage. (Original.) 



THE VARIABLE CURRANT APHIS.^ 



The variable currant aphis is one of the most injurious species. 

 The stem-mother is purplish green with white honey tubes. The 

 wingless form is dark green, tan, or dark brown, whereas the winged 

 form has a black head and body, with a dark green abdomen marked 

 near the tip and on the sides with black. 



As soon as the stem-mother begins to feed, the young leaf begins 

 curling about her. As young are produced other leaves are attacked 



Myzus dispar Patch. 



Apliifi variann Patch. 



