The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 60
... spiracles open ( fig . 6 , c ) , has three pairs of con- spicuous conical processes beset with bristles . Besides the large tail - spiracles , there is a pair of very small air - holes situated laterally on the prothorax . These larvæ ...
... spiracles open ( fig . 6 , c ) , has three pairs of con- spicuous conical processes beset with bristles . Besides the large tail - spiracles , there is a pair of very small air - holes situated laterally on the prothorax . These larvæ ...
Страница 71
... spiracles open at a stout medium cylindrical prominence on the tail - segment , which bears also a pair of short spiny processes ( fig . 12 ) . There are small paired spiracles on the prothorax . The cuticle of the larva is covered with ...
... spiracles open at a stout medium cylindrical prominence on the tail - segment , which bears also a pair of short spiny processes ( fig . 12 ) . There are small paired spiracles on the prothorax . The cuticle of the larva is covered with ...
Страница 107
... spiracles . In order to attempt an explanation of these muscles it is necessary to briefly consider first the structure of this skeleton . From the posterior region of this segment of the body a median spiracular lobe , as it may be ...
... spiracles . In order to attempt an explanation of these muscles it is necessary to briefly consider first the structure of this skeleton . From the posterior region of this segment of the body a median spiracular lobe , as it may be ...
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abdomen abdominal segment adult antennæ ants aphid Aphis Appearance apple arsenic attacked body breeding brood buds California caterpillars cells cent citrus cocoons colonies color Commissioner cornicles cyanide damage deposited destructive Distribution dorsal early eggs Entomologist erichsonii Essig Family feed femora flies foliage Food Plants fruit fumigation gallons genus green hatch head hibernate History horticultural host inch long infested instabilis ladybird beetle larch Larch Sawfly large numbers larva larvæ lateral leaves legs Linn louse maggots male mealy bug mermithergates mites mosquitoes moth muscles Natural Enemies nest numbers observations Orasema orchards ovipositor P. C. Jr parasites Paris green pest Pheidole plant lice Plate Polyederkrankheit pound pseudogynes pupa pupæ pupal pupate quarantine Raupen sawfly scale insects southern species specimens spiracles spray spring stage summer surface thorax thrips Throughout the entire trees usually ventral winged female winter workers yellow young