348 REPORT 1 OP NEW JERSEY STATE MUSEUM. 
G. luteola Miill. The elm-leaf beetle; common throughout the State, and 
usually more or less injurious to city shade trees. There is only a 
single brood in most of the State, and thorough spraying with 
arsenate of lead, 1 lb. in 20 gallons of water, will prevent injury. One 
spraying shohld be made when the beetles first begin to feed, the 
second when the eggs begin to hatch, and the effort should then be 
to hit the underside of the leaves. 
MONOXIA Lee. 
M. puncticoliis Say. On salt meadows, from the Passaic to Cape May 
VI, VII; usually not rare; strictly maritime. 
D!ABROTICA Chev. 
Fig. 140.—Spotted cucumber beetle, Diabrotica 12-punctata: a, egg; b, larva; 
c, hole's drilled in corn stalks; d, pupa; e, adult: all enlarged. 
D. 12-punctata Oliv. Common throughout the State IV-X on a great 
variety of plants and sometimes injuring cucurbs; larva in roots of 
corn and grasses. 
D. vittata Fab. The “striped cucumber beetle”; throughout the State; 
common and often seriously injurious to cucurbs. The beetle eats 
into the stem at the surface, the larva mines in it a little under¬ 
ground. Most of the injury is done by the beetles, which attack the 
plants soon after they are up, and a great variety of methods are 
employed to prevent it. Sometimes carbolized lime or lime and tur¬ 
pentine are applied in the hill, or a dead fish, or freshly ground bone, 
