THE COCCIDAE OF CALIFORNIA. 



61 



Chrysomphalus aonidum Linn. 



(Florida Red Scale.) 



Scale of Female. Circular, moderately convex, smooth; dark oliva- 

 ceous brown or reddish brown, paler at margin. Pellicles reddish 

 yellow, always partially obscured by a layer of secretion, which is 

 reddish brown above the first, and pale olivaceous above the second 

 pellicle. In the center of circular raised disk is usually exposed, the 

 secretionary covering being here worn off. In young specimens the 

 center is covered by a raised patch of opaque white secretion. The 

 first pellicle convex above; the second often slightly concave; the form 



FIG. 29. Chrysomphalus aonidum (Florida Red Scale). On orange twig, 

 a, female, greatly enlarged. 



may best be observed from the inside of the scale, where the exuviae are 

 more fully exposed. Ventral scale obsolete. Diameter, 1 to 2 mm. 



The male puparium is dark brown, with pale gray margins. Pellicle 

 reddish fulvous. Length, .8 mm. 



Adult Female. Yellow, or white mottled with yellow. Body broadly 

 rounded in front, tapering suddenly to a point behind. On the margin 

 of the mesal thorax is a small thickened patch bearing a stout thorn- 

 like spine. Pygidium with six prominent lobes subequal in size, each 

 notched on the lateral edge. At a short distance beyond the lobes the 

 lateral margin is thickened and projecting, with minute serrations and 

 two deep indentations. Plates deeply fringed; two in the mesal and 

 first spaces, three in the second space, and three beyond the third lobe, 

 these last being bifurcate and fringed on their lateral edges. Circum- 

 enital glands in four groups; lower laterals with 2 to 4, upper laterals 



