454 



INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



cases of serious infestation so many of these tips are killed that the 

 tree appears brown and very unhealthy. 



Distribution. — The cypress moth occurs in the central and southern 

 parts of the State. 



Food Plant. — The Monterey cypress is the only host so far reported 

 of this pest. 



Control. — Thorough and regular pruning will usually suffice to 

 control this pest in hedges. Where trees are grown for windbreaks or 

 other than for hedges liberal applications of lead arsenate when the 

 eggs are hatching in the fall or spring are advised. 



THE CALIFORNIA PARSLEY CATERPILLAR 20 



Papilio zolicaon Boisduval (Family Papilionidse) 



{Papilio zelicayn Lucas) 



(Papilio califomica Menetries) 



(Fig. 465) 



Description. — The butterfly is one of the smaller swallow-tails 

 having a wing expanse from 2 to 34 inches. The color is black and 

 orange-yellow, each being about equal in extent, the yellow being 

 distributed along the edges and in the middle of the wings. The 

 caterpillars are yellowish-green with continuous and broken black 



Fig. 465. — Larva and pupa of the California parsley caterpillar, 

 Papilio zolicaon Boisd. Enlarged one and one half times. (Author's 

 illustration, Mo. Bui. Cal. Hort. Com.) 



bands around the body and having an orange-yellow forked scent 

 organ just back of the head which is thrown out when disturbed. 

 When full grown they are about 2 inches long. The chrysalids vary 

 from green to dull gray, somewhat mottled and about 1 inch long. 

 The eggs are small, rounded, reddish-brown and about T V inch long. 

 Life History.— The eggs are laid singly upon the plants in the spring 

 and after hatching the caterpillars at once begin to feed upon the foliage 



: -"Tliis is the common celery and parsley caterpillar found in California. Papilio 

 polyxenes Fah., listed as such in the first edition, is reported as being very rare in 

 this State. The above species (P. zolicaon Boisd.) was a'so listed as the California 

 orange dog in the first edition. 



