INSECTS INJURIOUS TO CITRUS GROVES. 497 



makes its way to an adjacent fence, tree or log. There it 

 enters the chrysalis stage. First an attachment is made 

 by means of a matted web joining the posterior end to 

 the chosen place. Then a strand of silk is attached to 

 the support, passed around the body, and with head up- 

 wards and the body inclining outward at an angle of 

 about 45 degrees, it spends its period of pupation, last- 

 ing from twelve to seventeen days, depending somewhat 

 upon weather conditions. The chrysalis is inconspicu- 

 ous on account of the strong similarity in color between 

 it and the object to which it is attached. It is brown 

 and gray-spotted and has a number of projections on the 

 anterior end. (Fig. C, Plate 33.) 



From this case, emerges a gorgeous black and yel- 

 low butterfly (Fig. D), about six inches across the tips 

 of the expanded wings. The yellow markings form two 

 bands, the upper one crescent-shaped, the lower almost 

 semicircular. On the projecting tips of the hinder wings 

 are two yellow, oval spots surrounded by a margin of 

 black and at the rear inner edges of the same pair of 

 wings, are two brownish or reddish spots with a small 

 crescent of blue dots above. Each female is capable of 

 depositing from four to five hundred eggs, which are de- 

 posited on the tender shoots and there are usually four 

 broods each season. 



Treatment. Hand-picking of eggs and caterpillars. 

 Paris green at the rate of four ounces to fifty gallons of 

 water may be sprayed on the foliage when the larvae are 

 present. 



Hubbard recommends shooting the butterflies. 



Besides citrus trees, the caterpillar feeds upon Xan- 

 thoxylum, on Ptelea and some other trees. 



