166 MONTANA EXPERIMENT STATION. 



PUTNAM'S SCALE INSECT, i. 



Putnam's scale insect is widely distributed and feeds on all or- 

 chard trees. It is similar to the San Jose scale in general appear- 

 ance but it may be easily distinguished from that species by the 

 orange colored spot (the exeuvia) on the scale of this species and 

 the less circular outline. 



This insect is single brooded. It passes the winter in a nearly 

 full grown condition. The young begin to hatch in July and con- 

 tinue during the month. 



Putnam's scale has been taken by the writer near Missoula in an 

 old orchard and on an old neglected tree in the cit}' of Missoula. 



THE GREEDY SCALE INSECT. 2. 



Smith cider and other varieties of apples coming into the Montana 

 market from California occasionally bear specimens of this scale 

 insect. We have seen apples with many specimens of this species 

 crowded in at the blossom and stem ends. It is not a species that 

 could survive our climate and need not be feared as a pest on apples 

 in Montana. It is common in greenhouses where it reproduces in 

 great numbers. 



The scale is gray in color but somewhat transparent so that when 

 covering the yellow body of the living female the scale has a yel- 

 lowish tinge. When removed from the bark or fruit a white scar 

 is left. 



The adult female scale is very convex and among scale insects is 

 conspicious for this characteristic. 



It is widely distributed in the United States and is without much 

 doubt an introduced species. 



1. Aspidiotus ancylus Putn. 



2. Aspidiotus camelliae Boisd. 



