. A text-book of agricultural zoology. Zoology, Economic. 122 INSECTA OE HBXAPODA. legs, attached, to the thoracic region on its ventral surface. This feature will at once separate them from aU other Arthropods. Eespiration is tracheal, the openings or spiracles being slit-like apertures along the sides of the abdomen, in addition to two pairs on the thorax. The typical mouth of an insect is described in chapter viL This is a biting mouth, a type of oral structure we find in many injurious insects. Others are provided with a piercing mouth, and live upon plant sap and animal blood, often causi
. A text-book of agricultural zoology. Zoology, Economic. 122 INSECTA OE HBXAPODA. legs, attached, to the thoracic region on its ventral surface. This feature will at once separate them from aU other Arthropods. Eespiration is tracheal, the openings or spiracles being slit-like apertures along the sides of the abdomen, in addition to two pairs on the thorax. The typical mouth of an insect is described in chapter viL This is a biting mouth, a type of oral structure we find in many injurious insects. Others are provided with a piercing mouth, and live upon plant sap and animal blood, often causing serious loss to the farmer and stockbreeder. The third form of mouth, the sucking month, mf w. 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 Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
