12 
THE COLORADO EXPERIMENT STATION 
Fig. 3.—Rocky Mountain Locust, laying eggs in the 
ground; a, a, females with their abdomens in the 
ground; 6, an egg-pod broken open; c, scattered 
eggs; d, egg-packet in the ground. fAfter Riley.) 
Grasshoppers that 
injure orchards usually 
come from adjoining 
alfalfa or grass fields. In 
such cases the free use 
of the hopper pan (34) 
in the alfalfa or grass 
field is the best remedy. 
One of the hopper-pans 
is shown at Fig. 2. *At 
Fig. 3 female grasshop¬ 
pers are shown in the 
act of depositing eggs 
in the ground. 
ATTACKING TRUNK AND BRANCHES. 
APPLE TWIG-BORER (Amphicerus bicaudatus) 
A cylindrical, mahogany-colored beetle, about one-third of an 
inch long, boring holes in twigs of apple, pear, cherry and other 
trees and grapevines. See Fig. 4. 
Fig 4.—Apple Twig-borer; a, beetle dorsal view; a beetle side view; b, pupa from 
beneath; c, grub, side view; d, apple twig showing burrow; e, burrow in 
tamerisk with pupa at bottom; /, stem of grape showing burrow. All enlarged 
except stems showing burrows. (Marlatt, Farmer’s Bulletin 70, Div. Ent., U. 8. 
Dept, of Agr.) 
Remedy .—Cat out the infested stems and destr oy the borers. _ 
*A very successful hopper pan made and used by Mr. P. K. Blinn at 
Rocky Ford is described and illustrated in bulletin 112 of this station. 
