BULLETIN 90, U. S. DEPARTMENT OF AGRICULTURE. 
DISTRIBUTION. 
The rose aphis is distributed over the entire United States, having 
been recorded from Massachusetts, New Jerse} , Illinois, Iowa, Minne- 
sota, Colorado, and California. It also occurs in Europe, from which 
country it was first described. 
The writer has collected it in southern California on all the 
commoner varieties of roses growing outdoors and has also taken it, 
in 1913, in Connecticut, Maryland, the District of Columbia, and 
Virginia. 
Fig. 2.— The small green rose aphis ( Myzus rosarum): a, Winged viviparous female; b, wingless viviparous 
female; 1, 2, antennal articles of winged female; 3, cornicle of same; 4, style of same; 5, third antennal 
article of same; 6, st yle of wingless female; 7, 9, front and antenna of same; 10, cornicle of same; S, process 
of sixth antennal article of same. Greatly enlarged. (After Essig.) 
CHARACTER OF INJURY. 
This insect, like all aphides or plant-lice, obtains its food by suction. 
The slender beak with which it is furnished is inserted into the plant 
attacked, and through tins the plant juices are taken up. The rose 
aphis in feeding chooses the tender and growing shoots and flower 
buds or the young unfolding leaves, and by feeding in large numbers 
checks the growth, the leaves and flowers being curled or distorted 
and prevented from attaining their perfect form. (Pis. I, II.) 
