278 SCHOOL ENTOMOLOGY 



149. Tomato Worms. The most common caterpillars 

 injurious to tomatoes are the large Horn-worms, which also 

 affect tobacco (10). Two species * are common, one being 

 more abundant in the North and the other in the South, but 

 they are very similar both in appearance and habits. The 

 full-grown larvae are about three inches long, of a dark green 



FIG. 200. Northern tobacco-worm, or "hornworm" (Phlegethontius 

 quinquemaculata). (After Howard, U. S. Dept. Agr.) 

 a, adult moth; b, full-grown larva; c, pupa slightly reduced. 



color with white stripes on the side of the body, those on the 

 northern species being a V-shape, while the Southern species 

 has simple oblique bands. At the tip of the abdomen is a 

 stout horn which gives them the name " horn-worms." 

 The larvae become grown in about three weeks, when they 



* Phlegethontius quinquemaculata Haworth (Northern), famil}- 

 Sphingidce, see page 89 and P. sexta Johansenn (Southern). 



