. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. STRUCTURE, GROWTH AND ECONOMICS OF INSECTS Ephemerida, and Coleoptera; suctorial, present in the Hemiptera, Lepidoptera and Diptera; and mandibulate-suctorial in the Hymen- optera. The mouth-parts with the exception of the labrum are true appendages of the head segments, and in the embryo arise in exactly the same way as the legs and antennae. Mandibidate MoiUh-parts.—The mouth-parts of biting insects consist of: the l
. Class book of economic entomology, with special reference to the economic insects of the northern United States and Canada. Beneficial insects; Insect pests; Insects; Insects. STRUCTURE, GROWTH AND ECONOMICS OF INSECTS Ephemerida, and Coleoptera; suctorial, present in the Hemiptera, Lepidoptera and Diptera; and mandibulate-suctorial in the Hymen- optera. The mouth-parts with the exception of the labrum are true appendages of the head segments, and in the embryo arise in exactly the same way as the legs and antennae. Mandibidate MoiUh-parts.—The mouth-parts of biting insects consist of: the labrum or upper lip attached to the clypeus (Figs. 2 and 4); a pair of mandibles, simple and unjointed, articulated to the gena; a pair of maxillcB, each made up of a basal one-, or two-jointed. 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 Lochhead, William, 1864-1927. Philadelphia : Blakiston
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectinsects, bookyear1919
