56 CALIFORNIA STATE COMMISSION OF HORTICULTURE. 



al)out one third the distance from this spine to the penultimate seg- 

 ments. In each case the spine on the ventral surface is a little laterad 

 of the one on the dorsal surface. 



Eggs. — Very light yellow in color. 



Scale of Male. — The scale of the male is slightly elongated, with the 

 larval skin nearly central; it is snowy white, with the larval skin light 

 yellow. Longest diameter, 1 mm. 



Male. — Yellow, mottled with reddish brown; central part of thoracic 

 band reddish. 



On oleander, magnolia, ivy, palms, etc.; also on lemons. 



This is another of the common species of the State, having quite a 

 range of host plants. It does not confine its attack to plants in the 

 greenhouses, but is met with in many places in the open. It also 

 attacks the lemon, usually infesting the fruit only; in such cases all the 

 fruit on the tree is removed, either fumigated or destroyed, and the pest 

 usually controlled. 



Aspidiotus jug-lans-regciae Comst. 

 (English Walnut Scale.) 



Srale of F, male. — Circular, flat, with the exuviae laterad of the center; 

 it is of a pale grayish brown color; the exuviae are covered with secre- 

 tion; the position of the first skin is indicated by a prominence which 

 is pink or reddish brown. The ventral scale is a mere film which 

 adheres to the bark. Diameter of scale, 3 mm. 



Female. — The color of the female when fully grown is pale yellow, 

 with irregular orange-colored spots; oral seta? and last segment dark 

 yellow. This segment presents the following characters: There are 

 either four or five groups of spinnerets; the anterior group is wanting 

 or consists of from 1 to 4 spinnerets; the anterior laterals consist of 

 from 7 to 16, and the posterior laterals of from 4 to 8. 



There are two or three pairs of lobes. The median lobes are well 

 developed, but vary in outline; the second lobe of each side is less than 

 one half as large as the median lobes, elongated, and with one or two 

 notches on the lateral margin; the third lobe is still smaller and 

 pointed, or is obsolete. 



There are two pairs of incisions of the margin, one between the first 

 and second lobes of each side, and one between the second and third 

 lobes. They are small, but are rendered conspicuous by the thicken- 

 ings of the body wall bounding them. 



The plates are simple, inconspicuous, and resemble the spines in 

 form. The larger ones are situated one caudad of each incision. 



