A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . Fio. 157.—Hackberry Butterfly.—[After Riley] Fipr. i5S.—Tbecl,i [After Scudder.] paratively short in the majority of cases; which, in addition to their above-ground habits, also adds to the ease with which they can be studied. Afew of the forms are to be considered of commercial value; as for exam-ple, the silk-worms. A very few also destroy scale in
A preliminary introduction to the study of entomologyTogether with a chapter on remedies, or methods that can be used in fighting injurious insects; insect enemies of the apple tree and its fruit, and the insect enemies of small grains . Fio. 157.—Hackberry Butterfly.—[After Riley] Fipr. i5S.—Tbecl,i [After Scudder.] paratively short in the majority of cases; which, in addition to their above-ground habits, also adds to the ease with which they can be studied. Afew of the forms are to be considered of commercial value; as for exam-ple, the silk-worms. A very few also destroy scale insects and plant-lice,and for this reason must be admitted among beneficial insects. Asidefrom these few exceptions we are compelled to look upon the Lepidopteraas enemies, notwithstanding their beautiful colors and graceful forms asimagoes. The order is readily separable into two well-defined groups know as. -PierlB rapae: a, larva;-[Riley]. b, chrysalis.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1894
