THE COCCIDAE OF CALIFORNIA. 



41 



corners, and are furnished with two long hairs upon the disk and three 

 much shorter ones at the tip. 



On orange, lemon, grape-fruit, oleander, pepper, ferns, sago palms, etc. 



The parasite Scutellista cytaea also attacks this species, and where it 

 is found in the open holds it in subjection. 



Saissetia oleae Bern. 

 (Black Scale.) 



Adult Female. — Densely chitinous; dark brown, almost black in 

 color, surface roughened and minutely specked w'ith small grayish 

 waxy granules. 

 Form highly con- 

 vex; length, 4 to 

 5 mm.; height, 

 3 mm. Dorsum 

 with a median lon- 

 gitudinal carina, 

 and two trans- 

 verse caringe, the 

 latter dividing the 

 body into three 

 subequal portions; 

 frequently the lon- 

 gitudinal ridge is 

 more prominent 

 between the trans- 

 verse ridges than 

 elsewhere, thus 

 forming with them 

 a raised surface of 

 the form of a cap- 

 ital H. Eyes incon- 

 spicuous. Scales 

 of anal operculum 

 pointed at extremities; outer edge rounded; base straight or slightly 

 concaved; outer edge twice length of base. Marginal hairs rather long: 

 extremity dilated and often deeply divided. Submarginal tubercles 

 six on each side. No stigmatic cleft. Stigmatic spines three, promi- 

 nent and sharply pointed, the median spine nearly four times the 

 length of the others. Antenna? with eight joints, of which the third is 

 always the longest. Legs rather slender; tarsus about three fourths 

 length of tibia; digitules of claw rather long. Dermal cells large, irreg- 

 ular polygonal, with rounded angles; the margin of each cell distinctly 

 4-c 



FIG. 19. Sahmia oicx (Black Scale). On olive branch, showing tlie 

 larvic of the ladybird Bkizobiiis ventral /■■^ at work destroying the 

 scales. 



