180 



PESTS OF GARDEN AND FIELD CROPS 



down the center of the back, bordered with hghter, narrow hnes and a 

 similar light hne on each side of the body. When crawling, the caterpillar 

 raises the bod}' sHghtly in 

 the middle. There are two 

 broods annually, the first 



Fig. 212. — Larva of the Hop 

 Snout-moth. Original. 



Fig. 213. — The Hop Snout-moth. Shghtly 

 enlarged. Original. 



in spring and the second in midsummer. The species hibernates as 

 an adult moth. Spraying with arsenicals will readily control the pest. 



Fig. 214. — Work of Endelomyia rosce. Original. 



Sawflies on Wheat 



Rarely the larvae 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 larvae are 

 dark gray, cylindrical, 

 and have 22 legs. In 

 the species Pachyne- 

 matus extensicornis 

 Nort., the larva is 

 greenish, with a yellow 

 head, a,nd has 20 legs. 



