:I6 



CAIJFOKNIA STATE COMMISSION OF HORTICULTURE. 



also noticeable in front. Length, from .20 to .27 of an inch; width 

 from .12 to .15 of an inch; height, from .05 to .10 of an inch. Antennae 

 tapering to the point, 7-jointed; joints I and 3 subequal; joint 2 nearly 

 three times as long as joint 1; joint 4 slightly longer than joints 5 and 



6; joint 7 is nearly same as joint .">, and 

 tapers to a point; a few bristles at the 

 tip and upon each joint. 



Eggs. — These are smaller and lighter 

 colored than Sausetia olese. 



Larvse. — Are long, oval, light yellow, 

 darker down the center, and can be dis- 

 tinguished from the larvae of oleiv in not 

 having the four reddish-brown marks 

 upon the dorsum. 



Like other species of Evlrc.aniiim that 

 produce but one generation a year, their 

 development is slow. They generally 

 hatch in June and locate upon the leaves, 

 where they go through their molt, and 

 then move to the young wood. In the 

 spring they grow rapidly and throw off 

 great quantities of excrement, into which 

 the spores of the black smut {Fumago 

 aalicinn) adhere and grow, injuring the 

 health of the tree and the market value 

 of the fruit. 



On apricot, prune, plum, cherry, peach, 

 pear. 



This species is commonly known in this State as the brown apricot 

 scale and is usually associated with E. pruinosum. The parasite Comys 

 fusca has held this scale in subjection for many years, usually accom- 

 plishing the work the second year after a colony has been liberated. 



FIG. 16. Eidecanium armeniacum (Brown 

 Apricot Scale). Showing scales on 

 prune branch; about natural size. 



Eulecanium cerasorum Ckll. 



This pest was first noticed in this State in 1904, a party having 

 brought in a branch of English walnut which was quite thickly infested 

 with the scale. Since then it has been found on pear trees. Dr. Howard 

 kindly verified my identification of the specimen sent at that time as 

 Eulecanium cerosnrnm. In tracing back the introduction of this pest I 

 find it came from Japan on an ornamental plant, which was planted 

 under the walnut tree above mentioned. 



