. Australian insects. Insects. ORTHOPTERA. 29 They measure up to about ^/o an inch in length; are elongate in form with large globular heads, small toothed jaws, and long, slender antennae composed of 20 or more bead-shaped joints which they are con- stantly movino- when they run about. The thorax is formed of three very elongated segments, so that each pair of legs is very wide apart; and in the winged forms the slender oar-shaped wings with very primitive ner- vures are so far from each other that they have quite a comical look; the abdomen is short, cylindrical, composed of 10 segments, rou
. Australian insects. Insects. ORTHOPTERA. 29 They measure up to about ^/o an inch in length; are elongate in form with large globular heads, small toothed jaws, and long, slender antennae composed of 20 or more bead-shaped joints which they are con- stantly movino- when they run about. The thorax is formed of three very elongated segments, so that each pair of legs is very wide apart; and in the winged forms the slender oar-shaped wings with very primitive ner- vures are so far from each other that they have quite a comical look; the abdomen is short, cylindrical, composed of 10 segments, rounded at the tip, with large anal appendages (cerci). The legs are curiously thickened, with the tarsi of the front pair shaped somewhat like a weaver's shuttle. Until last year they were unknown in Australia, when I des- cribed two species (Proc. Linn Soc. 1904); the first Oligotoma agilis, is a wingless form, of which I found two specimens while turning over granite boulders at Bomen near Wa^ga The second, Oligotomn gurneyi, was obtained by Mr. Fig. 15.—Oligotoma gurnci/i (Froffgatt). The web spinning-embiid. With a dia- gram showing the primitive structure of wing. (Pro. Linn. See. ). 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 Froggatt, W. W. (Walter Wilson), 1858-; Metcalf Collection (North Carolina State University). NCRS; Tippmann Collection (North Carolina State University). NCRS. Sydney, W. Brooks
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