Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 KEY TO THE OKDKl.'S 287 AA.—Wings rudimentary or wanting. B.— Mouth prolonged into a beak. BB.— Mouth not prolonged iuto a beak. C.— Tarsi five-jointed. Panorpidae. (Certain Scorpion-Flics.) CC.— Tarsi four-jointed. Phri/gancidar. (Certain Caddis-Flies.) Tcrmitiditc. (Certain White Ants.) CCC.— Tarsi two- or three-jointed. D.—Wings absent; or two rudimentary, leathery. Psocidae. (Certain Book-Lice.) DD.— Four rudimentary wings, veins visible. Perlidae. (Certain Stone-Flies.) CCCC.—Tarsi one-
Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 KEY TO THE OKDKl.'S 287 AA.—Wings rudimentary or wanting. B.— Mouth prolonged into a beak. BB.— Mouth not prolonged iuto a beak. C.— Tarsi five-jointed. Panorpidae. (Certain Scorpion-Flics.) CC.— Tarsi four-jointed. Phri/gancidar. (Certain Caddis-Flies.) Tcrmitiditc. (Certain White Ants.) CCC.— Tarsi two- or three-jointed. D.—Wings absent; or two rudimentary, leathery. Psocidae. (Certain Book-Lice.) DD.— Four rudimentary wings, veins visible. Perlidae. (Certain Stone-Flies.) CCCC.—Tarsi one- or two-jointed. Mallophagidae. (Bird-Lice.) COLEOPTERA. A.— Head not prolonged into a narrow beak, B.— Tarsi five-jointed. c. d. FIG 215. Various forms of antennfe of beetles, a, filiform, or thread-like ; 7>, serrate, or saw-like; e, pectinate, or comb-like ; d, lamellate, having an enlarged end, composed of plates. C.—Antenna? with terminal joints leaf-like (lamellifonn; , broader and flatter than basal segments.) (Lamelli- cornia.) D.— The ventral surface of abdomen divided into five seg- ments; elytra cover entire dorsal surface of abdomen;
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