THE INSECT WORLD. 



253 



bright yellow in color, with transverse black bands. Towards 

 the South and West, occurring rarely, however, as tar north as 

 Canada, we have a form of the female which is black, but maybe 

 distinguished by its large size from our normally black species. 

 The caterpillar is green, and distinguished by having two black, 

 eye-like spots on the anterior segments. It feeds on a number 

 of different plants, but does not become economically important. 

 In Florida, P. crcsphontcs is abundant, and its caterpillar is 

 known as the ' ' orange dog, ' ' from its peculiar appearance and 



Fig. 271. 



The orange dog, caterpillar of Papilio cresphontes, with osmateria, or scent-organs, 

 extended ; the detached figure shows the anterior segments normally retracted. 



habit of feeding upon orange-leaves. The butterfly is even larger 

 than the turn us, and is black, with a broad diagonal band of 

 contiguous yellow spots extending from the tip of the fore-wings 

 towards the base, reaching the inner margin very near to the base 

 of the hind wings. There is also a band of yellow spots near the 

 outer margin, which are especially prominent on the hind wings, 

 and a yellow spot occupies the centre of the broad, lobed tail. 

 The caterpillars are prominent, as already stated, and orange- 

 growers consider them among the greatest troubles of the young 

 trees, especially in the nurseries, where a single specimen may 

 defoliate a shoot in a little time. Hand-picking on small trees is 

 a feasible and satisfactory remedy, and another is to capture the 



