EXPLANATION TO PLATES. 



PLATE I. 



YOUNG ORANGE TEEE, HEALTHY AND DISEASED. 



(From photographs.) 

 FIG. 1. Young Orange tree in healthy condition. | FIG. 2. Young Orange tree in diseased condition. 



PLATE II. 



DIE-BACK OP THE ORANGE. 



(Original.) 



FIG. 1. Die-back of the Orange, natural size and 



slightly enlarged. 



FIG. 2. Bark fungus on twigs of Orange infested 

 with Long Scale, natural size and slightly 



enlarged. 

 PLATE III. 



COMMON ARMORED SCALES OF THE ORANGE. 



(From Comstock's Report for 1880.) 



FIG. 1. Hytilispis citricola (Pack.) : 1, scales on 

 Orange, natural size ; la, scale of female, 

 dorsal view; 1&, scale of female with 

 ventral scale and eggs ; Ic, scale of male, 

 enlarged. 



FIG. 2. Mytilaspis gloverii (Pack.): 2, scales on 

 Orange, natural size ; 2a, scale of female, 

 dorsal view; 2&, scale of male; 2c, scale 

 of female with ventral scale and eggs, 

 enlarged. 



FIG. 3. Parlatoria pergandii Comst. : 3a, scale of 

 female; 3&, scale of male, enlarged. 



PLATE IV. 



TWIGS OF ORANGE INFESTED WITH LONG SCALE. 



(Original.) 

 FIG. 1. Larger branch sparsely covered. | FIG. 2. Twig thickly covered.' 



PLATE V. 



CHAFF SCALE OF THE ORANGE. 



(Original.) 

 PLATE VI. 



ENEMIES OF BARK-LICE. 



FIG. 1. Aphelinus mytilaspidis: a, the parasite; 

 6, antenna; c, larva, enlarged. (After 

 Riley.) 



FIG. 2. Hyperaspidius coceidivomg : a, larva, en- 

 larged ; 6, head of larva, much enlarged ; 

 c, side of head, showing eyes and an- 

 tenna, still more enlarged; d, beetle. 



(Original.) 



FIG. 3. Dakruma coccidivora : a, egg; &, larva; c, 

 pupa ; d, moth, enlarged ; e, moth at rest 

 upon a bark-louse, natural size. (After 

 Com stock.) 



FIG. 4. Leptocorisa tipuloides, slightly enlarged. 

 (Original.) 



FIG. 5. Roseate Orange Mite, greatly enlarged. 



(Original.) 



PLATE VII. 



APPARATUS FOR SPRAYING ORANGE TREES. 



(From a photograph.) 



(219) 



