LEPIDOPTERA 



171 



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

 example. When full grown 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 i)('fuliar " jug-handle " sheath, in which the sucking 

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

 of crops are the best remedies. 



Fig. 142. — Metamorphosis of monarch butterfly (Anosia plexippus): 

 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 (Ano'sia plexip'pus) (Fig. 142) 

 is one of our most abundant species. Hundreds or even thousands of 

 these butterflies may sometimes be 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. 



