. Elementary lessons on insects. Insects. 114 ELEMENTARY LESSONS ON INSECTS 7. Spiracles at the front margin of each segment of the synthorax and of the first seven segments of the abdo- men. 8. The absence of wings externally. 9. The prolegs underneath the abdomen, their number and position, and the circlet of crochets on the end of each. 10. The vestiture of bristles on the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
. Elementary lessons on insects. Insects. 114 ELEMENTARY LESSONS ON INSECTS 7. Spiracles at the front margin of each segment of the synthorax and of the first seven segments of the abdo- men. 8. The absence of wings externally. 9. The prolegs underneath the abdomen, their number and position, and the circlet of crochets on the end of each. 10. The vestiture of bristles on the Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Needham, James G. (James George), 1868-1956. Springfield, Ill. , Baltimore, Maryland, C. C. Thomas
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Keywords: ., bookcentury1900, bookcollecti, bookdecade1920, booksubjectinsects
