. Zoology. Zoology. lOOLOGlCAL lABORAIORY, McGRAW HAU THE TET8AN0PTEBA. 121 Order 7. Thysanoptera.— Thrips and its allies were re- ferred by Haliday to a distinct order. The mouth-parts form a sort of beak; the mandibles are bristle- like ; the maxillje flat, triangular, bearing two- to three-jointed palpi; the labial palpi are very short, two- to three-jointed. The wings are small, long and narrow, fringed; both pairs of equal size, usually without veins. The antenna3 are five- to nine-jointed. Order 8. llemiptera.—The bugs (Fig. 150) have a long beak bent on the breast. They suck the juices
. Zoology. Zoology. lOOLOGlCAL lABORAIORY, McGRAW HAU THE TET8AN0PTEBA. 121 Order 7. Thysanoptera.— Thrips and its allies were re- ferred by Haliday to a distinct order. The mouth-parts form a sort of beak; the mandibles are bristle- like ; the maxillje flat, triangular, bearing two- to three-jointed palpi; the labial palpi are very short, two- to three-jointed. The wings are small, long and narrow, fringed; both pairs of equal size, usually without veins. The antenna3 are five- to nine-jointed. Order 8. llemiptera.—The bugs (Fig. 150) have a long beak bent on the breast. They suck the juices of plants and blood of insects. The chinch- bug (Fig. 151) is fearfully destructive in certain years to corn and wheat; collecting under the base of the leaves in great num- bers, it sucks the sap and kills the plant. While most insects live but one and some live two years, the seventeen-year Cicada (Fig. 152) lives over sixteen years as a larva, becoming a pupa and finally acquiring wings in the seventeenth year. Sq'uSh-bugrNatural The Aphis or plant-louse (Fig. 153) is'*'^'='- provided with two tubes on the end of the body from which n 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 Packard, A. S. (Alpheus Spring), 1839-1905. N. Y. , Holt
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1897
