The Shipley Collection of Scientific Papers, Том 1641833 |
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Страница 29
... stage , thus differing from most insects having incomplete metamorphosis , in which this stage is very active , differing from the adults only by the small wing pads . Those species having a quiescent pupal stage are characterized by ...
... stage , thus differing from most insects having incomplete metamorphosis , in which this stage is very active , differing from the adults only by the small wing pads . Those species having a quiescent pupal stage are characterized by ...
Страница 196
... stage , while in the south adult butterflies FIG . 183.- Adult and larva of the imported cabbage worm ( Pontia rapæ Sch . ) . ( U. S. Dept. Agrcl . ) may be seen almost any time of the year . They become very much in evidence early in ...
... stage , while in the south adult butterflies FIG . 183.- Adult and larva of the imported cabbage worm ( Pontia rapæ Sch . ) . ( U. S. Dept. Agrcl . ) may be seen almost any time of the year . They become very much in evidence early in ...
Страница 9
... stage . On focussing through the pustulate envelope the semipupa is seen to present the appearance of Fig . 20 ( Pl ... stage is reached , the insect hatches . The changes from the stage represented in 1907. ] 9 Wheeler , The ...
... stage . On focussing through the pustulate envelope the semipupa is seen to present the appearance of Fig . 20 ( Pl ... stage is reached , the insect hatches . The changes from the stage represented in 1907. ] 9 Wheeler , The ...
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