X DECIDUOUS FEUIT INSECTS AND INSECTICIDES. 



Page. 

 Plate XVIII. The grape scale. Fig. 1. — Showing how the young scales set- 

 tle, more or less, in longitudinal rows. Fig. 2. — Full-grown 

 male and female scales; also many parasitized individuals. 

 Fig. 3.— Pygidium of adult female, showing circumgenital 



glands and orifice, lobes, and spines 116 



XIX. The grape scale. Fig. 1. — Adult winged male. Fig. 2. — Geni- 

 talia of male. Fig. 3. — Antenna of male. Fig. 4. — Serrations 

 on costal vein. Fig. 5. — Tarsus and claw of male 118 



TEXT FIGURES. 



Fig. 1. The grape leafhopper (Typhlocyba comes var. coloradensis) : Adult 1 



2. The grape leafhopper: Nymph of the first molt 3 



3. The grape leafhopper: Fully developed nymph of the fifth molt 3 



4. Grape leaf in early stages of attack by the grape leafhopper, showing 



the characteristic mottling of the upper surface 4 



5. Grape leaf showing final result of attack by the grape leafhopper; leaf 



withered and brown before the fruit is mature 5 



6. Weekly emergence of codling moths from overwintered material at 



San Jose, Cal., 1909 18 



7. Codling-moth larvae collected from banded pear trees at Walnut Creek, 



Cal., 1909 27 



8. Codling-moth larvae collected from banded apple trees at Walnut 



Creek, Cal., 1909 27 



9. Weekly emergence of codling moths from material collected from 



banded apple and pear trees at Walnut Creek, Cal., 1909 28 



10. Band records from 11 apple trees at W T alnut Creek, Cal., 1910 29 



11. Band records from 15 Bartlett pear trees at Suisun, Cal., 1910 30 



12. Weekly emergence of moths from material collected under bands on 11 



apple trees at Walnut Creek, Cal., 1910 31 



13. Weekly emergence of moths from material collected under bands on 15 



pear trees af Suisun, Cal., 1910 32 



14. Band records of the codling moth from apple trees at San Jose, Cal., 



1909 32 



15. Weekly emergence of codling moths from larvae collected from banded 



apple trees at San Jose, Cal., 1909 33 



16. Condition of grape blossom-buds at the time the rose-chafter (Macro- 



dactylus subspinosus) first appears, and when the first poison spray 

 should be applied 54 



17. Injury by the rose-chafer to grape blossom-buds 54 



18. The rose-chafer ( Macrodactylus subspinosus): Adult, larva and details, 



pupa, work 55 



19. Injury by the rose-chafer to berries of grape 56 



20. Grape cluster showing almost total destruction of berries through 



feeding of the rose-chafer 57 



21. Grape clusters from which berries injured by the rose-chafer have fallen 58 



22. The California peach borer: Adult, larva, pupa, and details 70 



23. Cage used in rearing the peach and plum slug 93 



24. Developmental stages of peach and plum slug (Caliroa [Eriocam- 



poides] amygdalina) : Adult, egg, larva, and pupa 59 



25. Hyperallus calirox, a parasite of the peach and plum slug 101 



26. The grape scale, Aspidiotus (Diaspidiotus) uvau: Newley hatched larva 



and details 117 



27. Cage used in rearing parasites of the grape scale 119 



