. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Richard [. Vanh-Wrkii11 & Michael BOPPRÍ: Adult Morphology and the Higher ('lassification ol Bia I lübner 241. Figs 24, 25: Caligo arisbe Hübner, 1822. Hindwing posterior androconial organs (from Barth 1953: figs 6. 7). Barth has called the structure 'apparatus assisting evaporation of the secretion'. An¡: analis of hindwing; dotted: naked area: BOR: ring of bristles: BO: bristles. [Note: obviously, the scale bar in 25 is incorrect.] Figs 26-32: Caligo eurilochu
. Bonner zoologische Beiträge : Herausgeber: Zoologisches Forschungsinstitut und Museum Alexander Koenig, Bonn. Biology; Zoology. Richard [. Vanh-Wrkii11 & Michael BOPPRÍ: Adult Morphology and the Higher ('lassification ol Bia I lübner 241. Figs 24, 25: Caligo arisbe Hübner, 1822. Hindwing posterior androconial organs (from Barth 1953: figs 6. 7). Barth has called the structure 'apparatus assisting evaporation of the secretion'. An¡: analis of hindwing; dotted: naked area: BOR: ring of bristles: BO: bristles. [Note: obviously, the scale bar in 25 is incorrect.] Figs 26-32: Caligo eurilochus (Cramer). Macrophotographs (26-28) and scanning electron micrographs (29-32) of hindwing posterior androconial organs. 26 hair tuft surrounded by a large shiny zone; 27, 28 partly (27) and fully (28) erected hair tuft; 29-31 tuft rows showing conjoined sockets of palisade-forming tuft hairs; scanning electron micrographs: 32 fine structure of hair. Scale bars: 26-28: 5 mm; 29: 100 urn; 30. 31: 20 urn; 32: 2 urn. near the anterior margin of the hind-wings. This lat- ter patch is covered by a bare spot on the under side of the fore-wings, close to the inner ; (cf. Figs. 1, 10). Close examination of the hair tuft of the posterior alar organ (Figs. 11-21) reveals a peculiar arrangement of the hairs from which it is formed. The tuft comprises several rows of transversely inserted hairs, the length of the hairs, the distance between the rows, and the number per row all diminishing posteriorly (Figs. 11, 15; th), so that the entire tuft tits into a pocket formed between veins 2A and 3A. The whole organ, in its retracted state, is about 6-7 mm in length. When the hairs are erect, single lines become apparent, forming palisades (Figs. 11. 12. 14). The fine structure of these hairs (Fig. 19) is typical for many Lepidoptera androconia but their bases are peculiar in being conjoined (Figs. 18. 21). Under- neath the hair tuft there is a large patch of modified scales (fig
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