LEPIDOPTERA 



171 



various trees or plants, the tomato-worm being perhaps the most familiar 

 example. When full ^rown this is sometimes 3 inches long. The pupa, 

 which lies buried in the ground, has a firm, naked, dark brown wall, and is 

 distinguished by the peculiar " jug-handle " sheath, in which the sucking 

 tube is developed. Hand picking of the larvse, fall plowing, and rotation 

 of crops are the best remedies. 



Fig. 142. — Metamorphosis of monarch butterfly {Anosia pkxippus): 

 a, Egg; b, larva; c, pupa; d, imago or adult. (From Jordan and Kellogg, 

 " Animal Life," D. Appleton and Co., Publishers.) 



The monarch or milkweed butterfly (Ann'sia plexip'pus) (Fig. 142) 

 is one of our most abundant sp(>cics. Hundreds or even thousands of 

 these butterflies may sometimes bo seen in a swarm, or '' roosting " together 

 in trees. Their wings are reddish brown, bordered with black, and the 

 veins are edged with black. There are two rows of white spots on the outer 

 margins. 



