PUNCTURING THE TWIGS 253 
Injured twigs may be removed in early spring 
or in the course of winter pruning. 
The Buffalo Tree-hopper (Ceresa bubalus Fab.) 
The twigs and smaller limbs of orchard trees 
sometimes show regular rows of oval scars, due 
to the egg-laying 
punctures of a 
curious little in- 
sect, the buffalo 
tree-hopper. The 
scars do not heal, 
and, if numerous, 
weaken the twigs. 
The insect that 
makes the pune- Fic. 342.— The Buffalo Tree- 
hopper. Enlarged and natu- 
ral size. Original. 
tures is triangular in shape, 
light green in color, three 
eighths of an inch long, and 
has a two-horned enlarge- | 
ment at the front of its body. fie Bie = eae ce 
The young that hatch from Buffalo Tree-hop- 
the eggs do not feed in or on per. Original. 
the twig, but on various weeds. 
In control, weeds should be kept down in the 
orchard, and twigs that show many of the egg-lay- 
ing slits may be pruned in winter. 
The Periodical Cicada (Tibicen septendectm Linn.) 
Occasional injury to twigs of fruit trees is re- 
; corded due to egg-laying punctures of the periodi- 
Fic. 344. — Work 
of the Periodical . ra i : i 
Cicada. Original. ‘‘ dog-day cicada,” or “locust,” which is heard 
eal cicada. This insect is closely related to the 
