1902.] INSECTS — RELATION TO AGRICULTURE. 2O3 



The scurvy bark louse (Chionaspis fur funis, Fitch). 



This is a very common scale insect. Unlike the oyster 

 shell bark louse, this is seldom found upon large orchard 

 trees, but commonly occurs on young trees in the nursery or 

 upon newly-set trees in the orchard. Apple and pear trees 

 are most commonly infested. The life history of this species 

 is very similar to that of the oyster shell bark louse, except 

 that the eggs hatch a few days earlier, usually hatching the 

 latter part of May. The eggs are oval in shape and purple 

 in color. The armor or shell is broader than that of the 

 oyster shell bark louse, and is of a light gray color and 

 sometimes nearly white. The armoi* of the female is broad 

 and pear shaped, while that of the male is smaller and is nar- 

 rower. On account of the color of this insect they are very 

 conspicuous upon the bark. 



The tomato worm (Protoparce ccleus). 



This is a common insect attacking the tomato and tobacco 

 plants of Connecticut. It is from three to four inches in 

 length when fully grown, and has a curved horn on the pos- 

 terior extremity. It injures the plants by eating the foliage. 

 It is the caterpillar of one of the sphinx moths which fly 

 about at dusk and sip honey from the flowers. The moth has 

 a large body with long narrow wings which are gray in color 

 and marked with black lines. The body has a row of orange 

 spots on each side. 



Hand picking is commonly practiced among the tobacco 

 growers of the State, though in Kentucky the tobacco plants 

 are sprayed with Paris green. Any of the arsenical poisons 

 will preserve the plants from the attacks of this insect. 



The green pea louse (Nectarophora pisi). 



During the season of 1899 the pea crop was severely in- 

 jured throughout the Atlantic states by the depredations of a 

 small plant louse, known as the green pea louse. It had 

 never occurred in destructive numbers before. It was not 

 known to American entomologists, but investigation showed 

 it to be identical with the European species, and it had been 

 introduced into America. It lives through the winter upon 

 the clover plant, either upon the crimson or red clover. It 

 leaves this plant about the first of June and goes on to the pea 

 vines in a garden or field, both the sweet peas and garden 

 varieties being subject to its attacks. In the canning dis- 



