50 



CALIFORNIA STATE COMMISSION OF HORTICULTURE. 



Aulacaspis rosse Bouche. 

 (Rose Scale.) 



Scale of Female. Circular or irregular, snowy white, sometimes with 

 yellowish tinge; 2.3 mm. in diameter; exuviae sublateral; first larval 

 skin naked, showing the segmentation; second covered. 



Scale of Male. 1.25 to 1.5 mm. in length; white and tricarinated. 



Female. Body elongated; the antepenultimate segment prominently 

 lobed and bearing 8 to 10 gland-spines. Median lobes large, approxi- 

 mated at base, serrulate, diverging, attached to body for entire length. 



FIG. 25. 



Aulacaspis rosae (Rose Scale). Branch showing scales on rose, a, male scale; 

 b, female; both greatly enlarged. 



Inner lobules of second, third, and fourth lobes rounder and larger than 

 the other lobule. Fourth lobe nearly obsolete." There is a gland-spine 

 laterad of each of the four lobes, and 2 to 4 near penultimate segment, 

 enlarging as they are farther removed from the meson. On the dorsal 

 surface the spines are situated as follows: one very small one on the 

 median lobe, and one slightly larger on the outer lobe of the second, 

 third and fourth lobes respectively, and one about three fourths of dis- 

 tance to penultimate segment. The spines on the ventral surface are 

 slightly mesad of the corresponding dorsal ones. Dorsal spines in three 

 rows; second row represented by anterior group of 2-3; third row, 



