INJURIOUS AND BENEFICIAL INSECTS OP CALIFORNIA. 



137 



The body proper is black and about the size of a garden pea, with a 

 prominent posterior tubercle or pygidium. The waxy covering is very 

 thick, making the diameter of the scale 

 from I to f inch. 



Life History. — The life history is 

 practically the same as that of Cero- 

 plastes floridensis Comst. 



Nature of Work.— The young first 

 settle upon the leaves and branches, but 

 later those on the former move to the 

 branches, which may be entirely covered. 



Distribution. — This scale occurs in 

 very limited numbers throughout the 

 State in greenhouses, and is often taken 

 in quarantine from Japan, Mexico, 

 India, Australia, Ceylon, Hawaiian 

 Islands and South America. 



Food Plants. — Camellia, Gardenia, 

 Hibiscus, mango, Myrica cerifera, orange 

 and tea are attacked. 



Control. — Control measures are the 

 same as for Ceroplastes floridensis 

 Comst. 



THE BARNACLE SCALE 



Ceroplastes cirripediformis Comstock 



Description.-This scale greatly re- jJ*^^ J %Sg2£,™£: 

 sembles the Florida wax scale in shape, if cms Anderson, on muscus. 



rm. v. j • j 1 i i j A. Enlarged twice. (Original) 



The body is dark red or brown, and the 



white waxy covering is mottled with shades of gray. There is a short 

 spine-like projection at the posterior end of the body, which is hidden 

 by the wax. The length is A inch, width £ inch, and the height the 

 same as the width. This species is larger and much more convex than 

 the Florida wax scale. 



Life History. — The eggs are reddish brown and darker than those 

 of the Ceroplastes floridensis. The young are dark brown. The devel- 

 opment and work are practically the same as that of Ceroplastes flori- 

 densis. 



Nature of Work.— The young and adults work upon the leaves and 

 smaller branches of the hosts. 



Distribution. — This scale has been occasionally taken upon imported 

 plants and in greenhouses, nurseries and private gardens. It has been 

 rarely found out of doors only in the central and southern parts of 

 the State. 



Food Plants. — China-ball tree, citron, Eupatorium, grapefruit, 

 lemon, Lignum ritce, myrtle, orange, persimmon, quince and Solatium 

 sp. are attacked. 



Control. — Control measures are the same as for C. floridensis. 



