ILLUSTRATIONS. 
PLATES. 
Page. 
Plate I. The San Jose scale and its work: Fig. 1. — Peach tree with top killed 
by the scale. Fig. 2. — Peach twig, moderately infested, showing 
male and female scale. Fig. 3. — Peach limb badly infested with 
scale 8 
II. Map of China and Japan, to illustrate geographical position in relation 
to native home and distribution of San Jose scale 12 
III. Fig. 1. — Japanese apple orchard, showing trellis method of training. 
Fig. 2. — Old native pear orchard of Japan, showing method of 
training 12 
IV. Fig. 1. — Pony fruit cart in which products of the hill country are 
brought into Pekin, China. Fig. 2. — Portion of street devoted to 
sale of fruits in Pekin, China 14 
V. Life zones of the United States 3-4 
VI. Fig. 1. — Large apple trees with lower limbs killed by the San Jose 
scale, Youngstown, N. Y. Fig. 2. — Apple infested with San Jose 
scale 34 
VII. Pupating larvae of Chilocorus similis on the terminals of twigs in 
Department orchard 66 
VIII. Cages used in breeding Asiatic ladybird ( Chilocorus similis) .66 
IX. Steam plants for cooking lime-sulfur wash 74 
TEXT FIGURES. 
Fig. 1. Map of the United States, showing localities known to have been 
infested with the San Jose scale up to 1896 19 
2. Aspidiotus pemiciosus: appearance of scale on bark 35 
3. Aspidiotus pemiciosus: young larva and developing scale . 44 
4. Aspidiotus pemiciosus: development of male insect 46 
5. Aspidiotus pemiciosus: adult male 47 
6. Aspidiotus pemiciosus: adult female - 48 
7. Aspidiotiphagus dtrinus 60 
8. Prospalta auraniii 61 
9. Ablerus clisiocampx: female 61 
10. Microweisea (Pentilia) misella: adults, larvae, pupie 63 
11. Chilocorus similis: oviposition and early larval stages 65 
12. Chilocorus similis: later larval stages, pupa, adult 66 
