41 
injure beets only when the former plant is exhausted or unavailable. 
Occasionally it occurs in some numbers, as has happened in several 
localities in the past three years, and then may attack various other 
useful plants, among which turnip, watermelon, Imckwheat,, grape, 
and the leaves of apple have been recorded. During 1900 Mr. Edward 
C. Post reported injury to sugar beets at Dundee, Mich., and Mr. T. 
Lytle, Manzanola, Colo., reported damage to tomatoes and to apple 
and prune trees. 
Fig. 
-Deilephila lineata: a, moth; Z>, pale larva; c, dark form of larva; d, pupa— all natural size 
(original, Division of Entomology) . 
The resemblance of the adult (hg. 38, a) to a humming bird is 
marked particularly when the insect is in flight. It will be noted that 
there are two forms of the caterpillar, a light one (b) and a dark one 
{c). The insect belongs to the same group as the more familiar 
tomato and tobacco worms, and its life habits are somewhat similar. 
Remedies. — On account of the large size of this insect it is not 
difficult to control it by picking the young caterpillars from the 
plants and destroying them. They also succumb to the arsenicals. 
