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 . Embryo of louse. oping the embryo. 708 APPENDIX. Fig. 658. Fi. G^ Fig. 659.

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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects