504 



CITRUS FRUITS AND THEIR CULTURE. 



is flat or very slightly con- 

 vex and the more recently 

 shed skins are toward the 

 narrow end. The male 

 scales are smaller, white 

 and marked with three par- 

 allel ridges. When clus- 

 tered on the twigs or leaves 

 of the citrus plants, the 

 males are very conspicuous 

 (Fig. 114). 



This scale is rarely 

 found in Florida, but is 

 abundant in Louisiana, 

 Bermuda and Cuba. 



Remedies: Same as for 

 Purple Scale, formula (9), 

 (8) or (7). 



III. UNARMORED SCALES. 



The Turtle-back Scale (Le- 

 canium hesperidum Linn. ) 

 The Turtle-back scale, with 

 others described in the fol- 

 lowing pages, belongs to a 

 sub-family of naked or 

 waxy scales, known as Le- 

 caninse; and are not covered 

 with a true scale. The genus of Lecaniums is unprotected 

 by any covering, except their skins, which becomes tough- 

 ened with age so as to resemble parchment. 



The full grown insect is from 0.12 to 0.16 of an inch 

 (3 to 4 mm.) long, broadly oval, more or less swollen 

 and convex upon the disk, surrounded by a thin, flat 



Fig. 114. The orange snow scale (CM- 

 onaspis citri Comstock), on under 

 side of orange leaf. 



