66 CALIFORNIA STATE COMMISSION OF HORTICULTURE. 



or crenate; the third lobe is quite inconspicuous, projecting but little 

 beyond the body wall, the margin crenate and one large notch in the 

 center of the lobe. 



The plates are long, simple, and tapering. There are two of them in 

 each of the following places: between median lobes; between first and 

 second lobes; between second and third lobes; laterad of third lobe; 

 and about midway between this lobe and the penultimate segment. 



There is an elongated pore between first and second lobes; two 

 laterad of each of the third and fourth pairs of plates; and one laterad 

 of the fifth pair of plates. The penultimate segment bears at least four 

 plates upon each lateral margin. 



The spines upon the dorsal surface are long, and are situated as 

 follows: one at the base of each margin of the first lobe; one dorsad of 

 incision of second lobe; one dorsad of the notch of third lobe; and one 

 about midway between the fourth and fifth pairs of plates. Those of 

 the ventral surface are as follows: cephalad of the bases of the first 

 pair of plates are two small spots which resemble the bases of spines, 

 and are doubtless the homologues of the first pair; the second spine of 

 each side is near the base of the lateral half of the first lobe; third 

 spine laterad of lateral lobule of second lobe, and fourth and fifth 

 spines between the members of the fourth and fifth pairs of plates 

 respectively. 



Eggs — The eggs are white, and are arranged irregularly under the 

 scale. 



Scale of Male. — The scale of the male is usually straight, or nearly 

 so; the same color as that of the female, or in some specimens varying 

 to a very dark brown, almost black, the larval skin light yellow. At 

 about one fourth of length of the scale from the posterior extremity, 

 the scale is thin, forming a hinge, which allows the posterior part of it 

 to be lifted by the male as he emerges. Length, 1.5 mm. 



On orange, lemon, grape-fruit, sago palms. 



This species is well known to many of our citrus-growers, and is 

 commonly known as the purple scale. It was introduced from Florida 

 on orange stock, and is to-day one of the most serious pests we have in 

 the State. By strict quarantine it has been practically confined to 

 certain districts, and with the use of insecticides and fumigation its 

 spread has been checked. At the Insectary we are now working on 

 material from which we hope to get its natural insect enemy, and if 

 successful, our past experience in this line gives us the hope that at last 

 we may be able to successfully control this pest. 



