380 



INSECTS INJURIOUS TO THE ORANOE. 



varying shades, and so exactly resembles that of the bark 

 of the orange-tree that it is extremely difficult to detect. In 

 from eight to sixteen days after the chrysalis is formed the 

 butterfly emerges. 



In Florida there are usually four broods of the butterflies 

 in the course of the summer, the last brood wintering in the 

 chrysalis state, from which the butterflies emerge in April. 

 Tiie caterpillar, which is commonly known as "the orange 

 dog" in Florida, devours the foliage of orange-trees, sometimes 

 seriously injuring young trees by stripping them bare. It 

 may easily be subdued by hand-picking, as its large size and 

 singular appearance promptly lead to its discovery. 



Within the past ten years this butterfly has extended ha 

 range very much, and it is now comparatively common 

 throughout the Northern and Western States, and in the 

 warmer parts of Canada. In the North it feeds chiefly on 

 prickly ash, Zanthoxylum Americanum. 



No. 240. — The Orange Basket-worm. 



Platoeceticus Glovcri Packard. 



During the month of February this insect is found upon 

 the orange-trees in different parts of Florida. The larva 

 forms an oblong-oval case of a paper- 

 like substance, interwoven with bits of 

 leaves or bark, as shown in Fig. 392 ; 

 within this it lives. When full grown, 

 it is a little over half an inch long, thick 

 and fleshy, and varies in color from light 

 brown to a much darker shade. The 

 head is marked with dark and light 

 wavy lines, and is protruded from the 

 case, along with the anterior segments, 

 when the larva is feeding or moving 

 from place to place. The case of the 

 female is about one-fourth larger than that of the male. Both 

 of these are shown in the fiirure. 



Fia. 392. 



