. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 176 Annals of the South African Museum. The bursa is a fairly elongate tube, whose diameter in the various genera can be more or less correlated with the robustness or bulk of the subapica] appendages on the penis of the respective males (cf. Phaon, figs. 1, h and 2, b, with Ischnura, fig. 1, d). Its lateral walls are more or less chitinised, chiefly towards the inner end, sometimes (Phaon, Chlorocypha) forming rather definitely demarcated. Fig. 2.—Bursa copulatrix (vagina) and accessory sac $ of Zyg
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 176 Annals of the South African Museum. The bursa is a fairly elongate tube, whose diameter in the various genera can be more or less correlated with the robustness or bulk of the subapica] appendages on the penis of the respective males (cf. Phaon, figs. 1, h and 2, b, with Ischnura, fig. 1, d). Its lateral walls are more or less chitinised, chiefly towards the inner end, sometimes (Phaon, Chlorocypha) forming rather definitely demarcated. Fig. 2.—Bursa copulatrix (vagina) and accessory sac $ of Zygoptera. a, Chloro- cypha caligata. b, Phaon iridipennis. c, Lestes virgatus and plagiatus. d, e, f, Chlorolestes conspicua, with variation in shape of apex of accessory sac. g, C. longicauda, accessory sac. h, C. peringueyi and nylephtha. i, j, Elattoneura mutata and frenulata, respectively. Jc, Pseudagrion caffrum. (In a-d, h-j the opening of the united oviducts is dotted. Variation in apex of accessory sac indicated by dotted line in a, 6.) chitinous plates, and as a rule with a patch of minute granules on the internal surface (fig. 2). The oviducts () enter the bursa by a common opening on the ventral surface. Between this opening and the dorsal accessory sac is a small (Ischnura, Enallagma, Pseudagrion, Allocnemis), or very small (Lestes), chitinous patch; in Elattoneura and Chlorolestes, where the opening of the accessory sac into the bursa is large, there. 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
Size: 1545px × 1617px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
