Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . al single cell. />. /. shows the germ just form-ing out of the nucleus (a) ; and /). The bodyof the germ is bent upon 652 D shows the embryo muchfurther advanced with the two pairsof lobes (md, rudimentary mandi-bles, d. rudimentary pad-like or-gans, seen in a more advanced stagein E) and the bilobate tail (nf).Fig. 653 shoAvs the first larval stageafter leaving the egg (m, mouth ; at,rudimentary antenna- : md, mandibles ;

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Guide to the study of insects, and a treatise on those injurious and beneficial to crops: for the use of colleges, farm-schools, and agriculturists . al single cell. />. /. shows the germ just form-ing out of the nucleus (a) ; and /). The bodyof the germ is bent upon 652 D shows the embryo muchfurther advanced with the two pairsof lobes (md, rudimentary mandi-bles, d. rudimentary pad-like or-gans, seen in a more advanced stagein E) and the bilobate tail (nf).Fig. 653 shoAvs the first larval stageafter leaving the egg (m, mouth ; at,rudimentary antenna- : md, mandibles ; d, tongue-like appen-dages ; st., anal stylets ; the subject of this figure belongs to adistinct species from Fig. 652 E). This strange form wouldscarcely be thought an insect, were not its origin and furtherdevelopment known, but rather a parasitic Copepodous Cms-acean. whence lie calls this the Cyclopx-like xtagc. In thiscondition it clings to the inside of its host by means of its. First larva of Platygaster. APPENDIX. temporary hook-like jaws (md), moving about like a Cestodesembryo with its well known six hooks. The tail moves up anddown, but is scarcely used in J locomotion. The nervous andvascular systems and trachea1 J Fig. b5 ce Fit;-, i;.V,.

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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects