Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . FIG. 33.—Primitive band orgerm of a Sphinx moth,with the segments indi-cated, and their rudiment-ary appendages, c, upperlip; at, antennae; md, man-dibles; mx, mx, first andsecond maxillae; I, I, I,legs; al, abdominal legs. -/—-a FIG. 34.—Embryo of a Water-beetle (Hydro-philus). E, egg; K, head; ol, upper lip; m,mouth; an, antennae; fcj, mandibles; fc2, fc3,maxillae; B, thorax; 6,, 62, b3, legs; /^-/IK,.ten pairs of rudimentary abdominal legs, ofwhich all except kl disappear before the in-sect hatches
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . FIG. 33.—Primitive band orgerm of a Sphinx moth,with the segments indi-cated, and their rudiment-ary appendages, c, upperlip; at, antennae; md, man-dibles; mx, mx, first andsecond maxillae; I, I, I,legs; al, abdominal legs. -/—-a FIG. 34.—Embryo of a Water-beetle (Hydro-philus). E, egg; K, head; ol, upper lip; m,mouth; an, antennae; fcj, mandibles; fc2, fc3,maxillae; B, thorax; 6,, 62, b3, legs; /^-/IK,.ten pairs of rudimentary abdominal legs, ofwhich all except kl disappear before the in-sect hatches; a, anus.—After Kowalevsky. skin thus thrown off is called the serous membrane; thesecond germ-layer (ectoderm) then arises, and a secondmembrane (called amnion, but not homologous with that ofvertebrates) peels off from the primitive band just as theappendages are budding out, so that the body and appen-dages of the embryo insect are encased in the amnion as thehand and fingers are encased by a glove. As seen in the GROWTH AND METAMORPHOSIS OF INSECTS. 37 accompanying Figs. 31-3
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
