DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
Piate XVIII. The grape scale. Fig. 1—Showing how the young scales set- 
i SE od 
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.5-.. +2) ..2--.- 222.222 
XIX. The grape scale. Fig. 1—Adult winged male. Fig. 2.—Geni- 
taliaof male. Fig. 3.—Antennaof male. Fig. 4.—Serrations 
on costal vein. Fig. 5.—Tarsus and claw of male........... 
TEXT FIGURES. 
. The grape leafhopper ( Typhlocyba comes var. coloradensis): Adult... - 
. The grape leafhopper: Nymph of the first molt...............------- 
. The grape leafhopper: Fully developed nymph of the fifth molt... .- 
. Grape leaf in early stages of attack by the grape leafhopper, showing 
the characteristic mottling of the upper surface. -........----.-.-- 
. Grape leaf showing final result of attack by the grape leafhopper; leaf 
withered and brown before the fruit is mature... ...........------ 
. Weekly emergence of codling moths from overwintered material at 
SanPJose si Call "MOOS eek eee ee wee eee NC cyt st Sie, SE, ge tere be a rete 
. Codling-moth larvee collected from banded pear trees at Walnut Creek, 
Gall: WQOG sss) 2 os see GB Ne ie eer eee es ee oe 
. Codling-moth larvee collected from banded apple trees at Walnut 
Greeks Cals G09. S p47 ee ORR ek TS See, ie ae ad fe a a ee 
. Weekly emergence of codling moths from material collected from 
banded apple and pear trees at Walnut Creek, Cal., 1909..........- 
. Band records from 11 apple trees at Walnut Creek, Cal., 1910....-..-- 
. Band records from 15 Bartlett pear trees at Suisun, Cal., 1910.......- 
. Weekly emergence of moths from material collected under bands on 11 
apple trees at Walnut Creek, Cal., 1910.22.24 2223.0 See eee 
. Weekly emergence of moths from material collected under bands on 15 
pear trees iat; Suisun, “Call. 1 910 ae ce con st fe yee eee ee eee 
. Band records of the codling moth from apple trees at San Jose, Cal., 
. Weekly emergence of codling moths from larvee collected from banded 
appleitneesatisandose) (Cal sIQ09 Sea ee yae== = eens ae eee 
. 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.. 3 ee tee DeGige alles settee ee oe eee ere 
. Injury by the rose-chafer to grape blossom-buds..........----------- 
. The rose-chafer ( Macrodactylus suwbspinosus): Adult, larva and details, 
Pup, Work Pek ss Se ae eee ae iets 2 eee aero 
. Injury by the rose-chafer toiberries of erapes----2- 3222-52. ---=- === 
. Grape cluster showing almost total destruction of berries through 
féeding of the rose-chafer®. 5 5 27¢m eet) s 2c 26 tne eee 
1. Grape clusters from which berries injured by the rose-chafer have fallen 
2. The California peach borer: Adult, larva, pupa, and details. ...---- : 
. Cage used in rearing the peach and plum slug............-..--------- 
. Developmental stages of peach and plum slug (Caliroa [Eriocam- 
poides| amygdalina): Adult, egg, larva, and pupa.......-.--------- 
. Hyperallus calirox, a parasite of the peach and plum slug.....------- 
}. The grape scale, Aspidiotus (Diaspidiotus) uva: Newley hatched larva 
and rdetarlare ssa fo ke oi OR eee ae re Beare ne ere 
. Cage used in rearing parasites of the grape scale.......-.------------ 
Page. 
116 
118 
59 
101 
Waly 
119 
