The Shipley Collection of Scientific Papers, Volum 1641833 |
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Side 29
... species . Several species have been known to be attacked by internal hymenopterous parasites , but the exact amount of this para- sitism for the various species is not well known . THE BEAN THRIPS . Heliothrips fasciatus Pergande ...
... species . Several species have been known to be attacked by internal hymenopterous parasites , but the exact amount of this para- sitism for the various species is not well known . THE BEAN THRIPS . Heliothrips fasciatus Pergande ...
Side 78
... species of Solenop- sis , etc. ) . 5. The worker form disappears completely , leaving only the males and females to represent the species , which thus returns to the condition of sex- ual dimorphism seen in the great majority of insects ...
... species of Solenop- sis , etc. ) . 5. The worker form disappears completely , leaving only the males and females to represent the species , which thus returns to the condition of sex- ual dimorphism seen in the great majority of insects ...
Side 87
... species of Formica ( F. fusca ) , the workers of which are willing to perform the same function as those of her own species in rearing her brood . In F. rufa and exsectoides there is nothing in the stature or struc- ture of the queen to ...
... species of Formica ( F. fusca ) , the workers of which are willing to perform the same function as those of her own species in rearing her brood . In F. rufa and exsectoides there is nothing in the stature or struc- ture of the queen to ...
Vanlige uttrykk og setninger
abdomen abdominal segment abundant 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 dark brown deposited destructive Distribution dorsal early eggs Entomologist erichsonii Family feed femora flies foliage Food Plants Formica fruit fumigation gallons genus green hatch head hibernate History horticultural host inch long infested injurious 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 queen Raupen sawfly scale insects southern species specimens spiracles spray spring stage summer surface thorax thrips trees usually ventral winged female winter workers yellow young