180 PESTS OF GARDEN AND FIELD CROPS 
down the center of the back, bordered with lighter, narrow lines and a 
similar light line oneachside of the body. When crawling, the caterpillar 
raises the body slightly in 
the middle. There are two 
broods annually, the first 
Fic. 212.— Larva of the Hop Fic. 213.— The Hop Snout-moth. Slightly 
Snout-moth. Original. enlarged. Original. 
in spring and the second in midsummer. The species hibernates as 
an adult moth. Spraying with arsenicals will readily control the pest. 
Sawflies on Wheat 
Rarely the larve of 
two or three species of 
sawflies are found feed- 
ing on wheat, eating 
the leaves, gnawing into 
the stems, or cutting 
off the heads. In the 
species Dolerus collaris 
Say and Dolerus arven- 
sis Say, the larve are 
dark gray, cylindrical, 
and have 22 legs. In 
the species Pachyne- 
matus extensicornis 
Nort., the larva is 
greenish, with a yellow 
Fic. 214.— Work of Endelomyia rose. Original. head, and has 20 legs. 
