128 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
to Arkansas and Florida on the south. There are several generations 
annually, depending on the locality. All forms feed on the twigs 
and small branches of the hosts and, when abundant, may cause se- 
rious injury or death of the affected parts. 
This species includes both wingless and winged viviparous females. 
The entire body is covered with a bluish-white bloom. In the winged 
female the head and thorax are dull black; the abdomen bears the same 
markings as that of the wingless form. Its general color is ash gray. 
The egg-laying female is wingless and lays several egos (fig. 24). 
The male is winged, 
Figure 24.—Females of Longistigma caryae laying eggs on an oak twig. 
The white pine aphid (Cinara strob2) is from 3 to 5 mm. long and is 
found from New England west to Illinois and south to the Carolinas. 
It feeds on the twigs and branches of eastern white pine, and small 
trees, when heavily attacked, may be seriously injured or killed. 
While feeding, the aphids pr oduce quantities of honeydew in which a 
sooty mold ‘develops, giving the attacked portions a blackened 
appearance. 
Females of this species are viviparous and include both winged and 
wingless forms. The female deposits her eggs in lines of five or six 
on the needles in the fall. When first laid, ‘they are yellow but soon 
turn jet black. They hatch about the middle of May in Maine and 
earlier southward. Infestations on ofnamentals may be controlled 
easily by washing the aphids off the trees with a direct stream of water 
from a garden hose, or by spraying as suggested on page 36. 
TrinE CALLIPTERINI 
Numerous species in this tribe are found on forest and shade trees 
in the eastern half of the United States. Few, however, appear to be 
