. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Stone-flies (Perlaria), with Descriptions of New Species. 547 on each side, folding down over the two dorsal plates of Xth tergite, each of which has a small chitinous knob; the chitinised lateral margins of the lobe are curved round and continued as two rods between the chitinised inner margins of the dorsal plates. Titillators rather stout, fused in their basal half, apices abruptly narrowed. Cerci setose, but the falcate processes of the pleurites are Fig. 21.—Desmonemoitra pulchellum T
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. Stone-flies (Perlaria), with Descriptions of New Species. 547 on each side, folding down over the two dorsal plates of Xth tergite, each of which has a small chitinous knob; the chitinised lateral margins of the lobe are curved round and continued as two rods between the chitinised inner margins of the dorsal plates. Titillators rather stout, fused in their basal half, apices abruptly narrowed. Cerci setose, but the falcate processes of the pleurites are Fig. 21.—Desmonemoitra pulchellum Tillyard. a, b, lateral and dorsal views <$ genitalia; c, dorsal plates of Xth segment, the outline of the supra-anal lobe dotted; d, titillators; e, f, lateral and ventral views of abdominal seg- ments VII-X ?. £ Genitalia (cf. Tillyard's figure 9 as A. barnardi).—Vllth sternite with transverse oval patch rather more strongly chitinised than the rest of segment, the lateral portions rather gibbous and the central portion concave, hence saddle-shaped. Subgenital plate on Vlllth segment bilobate, with deep triangular excision, apices rounded. Cerci cylindrical, shorter than in $, but longer than in the othei genera. Fore-wing.—$ 6 mm., ? 7-8 mm. Colour.—Upper surface of head, meso- and meta-thorax blackish. Basal joints of antennae pale, subsequent joints brown, distal joints dark brown. Upper surface of prothorax lemon-yellow, of abdomen pale yellowish-brown. Lower surface of head, thorax, and abdomen pale yellowish-white. Genitalia brown. Wings banded with black. 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
