The Shipley Collection of Scientific Papers, Том 1641833 |
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... legs . In the same phylum are to be found the following classes : 1. Crustacea . - Water - breathing animals , with many legs and hard exoskeleton ; head and thorax united . Examples : crabs , lobsters , crayfish and sowbugs . FIG . 1 ...
... legs . In the same phylum are to be found the following classes : 1. Crustacea . - Water - breathing animals , with many legs and hard exoskeleton ; head and thorax united . Examples : crabs , lobsters , crayfish and sowbugs . FIG . 1 ...
Страница 88
... legs , enabling them to move about freely . In many species the legs are retained throughout the entire life cycle , enabling the adults to move as freely as the young , but in the scale - bearing species the legs disappear in the ...
... legs , enabling them to move about freely . In many species the legs are retained throughout the entire life cycle , enabling the adults to move as freely as the young , but in the scale - bearing species the legs disappear in the ...
Страница 272
... legs spread out at the sides and the antennæ flattened out in front , not unlike two long front legs . It was possible to obtain a large number of these internal parasites from small breeding cages filled with adult mealy bugs and their ...
... legs spread out at the sides and the antennæ flattened out in front , not unlike two long front legs . It was possible to obtain a large number of these internal parasites from small breeding cages filled with adult mealy bugs and their ...
Чести термини и фразе
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