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 . m c. Fig. 66. Fig. 67. the larva, though a little more produced anteriorly than inits natural form. In another stage (Fig. 65) of the semi-pupa, the larval skinis entirely sloughed off, the two pairs of wing-pads lying paral-lel, and very equal in size, like the wings of Nenroptera. Thethoraco-abdominal ring, or propodeum (c), is distinguished byits oblong spiracle (H), essentially differing from those onthe abdomen. At this point the body contra
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 . m c. Fig. 66. Fig. 67. the larva, though a little more produced anteriorly than inits natural form. In another stage (Fig. 65) of the semi-pupa, the larval skinis entirely sloughed off, the two pairs of wing-pads lying paral-lel, and very equal in size, like the wings of Nenroptera. Thethoraco-abdominal ring, or propodeum (c), is distinguished byits oblong spiracle (H), essentially differing from those onthe abdomen. At this point the body contracts, but the head TRANSFORMATIONS OF THE INSECT. 67 and thorax together are yet, as still more in the previousstage, much smaller than in the pupa, and there is still a con-tinuous curve from the tip of the abdomen to the head. (0,antenna; //, lingua, maxillae, and palpi; ?, fore-legs; j, mid-dle legs; A-, meso-scutum; ?, ineso-scutellum; ?i, spiracle ofthe propodeum.) In a succeeding stage (Fig. 66) of the semi-pupa, the headand thorax together nearly equal in size the abdomen, and thepropodeum (c) has become entirely transferred to the
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishe, booksubjectinsects
