10 SCALE-INSECTS 



parent so that it appears yellowish when covering a living female; 

 prominence covering exuviae is dark brown or black, usually with a 

 central dot and concentric ring which are white. Ventral scale snowy 

 white, usually entire. Diameter 1.5 mm. (0.06 inch). 



Female. Body nearly circular in outline, bright yellow in 

 color with more or less translucent blotches. The last segment 

 presents the following characters: Groups of spinnerets wanting. 

 Only one pair of well-developed lobes, the median, present. These 

 are prominent, and each one is furnished with a notch on each side. 

 Second and third pairs of lobes represented by minute pointed pro- 

 jections of margin of body. 



Egg. The eggs and newly hatched larvae are yellow. (From 

 Comstock's description.) 



Food-plants. This scale attacks a great number of plants, 

 trees and shrubs. In California it has been found on olive, moun- 

 tain laurel ( Umbellularia californica), almond, quince, fig, willow, 

 eucalyptus, acacia, apple, pear, and others. In Florida, on Euony- 

 mus japonicus. It has been found here on apple, pear, and peach. 

 Like the preceding scale, it affects not only the bark of the trunk 

 and limbs but the leaves and fruit as well. 



This species is also known as the greedy scale. It sometimes 

 occurs in a locality in great numbers, when it becomes very destruct- 

 ive, but as a rule it does not spread rapidly and is not to be com- 

 pared with the San Jose scale. If, however, it is allowed to gain 

 a good foothold, it will be troublesome to exterminate it, owing 

 to the large number of plants upon which it subsists. 



Parasites. Aphelinus fuscipennis Howard, mentioned under 

 San Jose scale, is suspected by Mr. E. M. Ehrhorn of being a 

 parasite of this species also. (See Insect Life, vol. iii, p. 487.) 



NO. in. THE CONVEX SCALE (Aspidiotus coiii'cxus Comstock). 



Plate I, fig. 3. 



This species very closely resembles A. rapcur. in the shape and 

 color of its scale. It is only by a careful study and comparison of 

 the two forms that it can be distinguished. A careful examination 



