Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . fusion of M3 + 4 with Cuj. The Text-fig. carpenteri, n. sp.(x8). The insect in the naturalposition of rest. chief purpose of this shortpaper is to demonstrate thispoint, as a preliminary to thecomplete working out of thenumerous undescribed generaand species of this family 272. Text-fig. 2. Dlnotoperla carpenteri, n. sp. Tracheation of wings of last larvalinstar (x48). For lettering, see text-fig. 3, except cu-a, cubito-anal, and sc-r} subcosto-radial trunk trachea. Text-fig. 2 sho
Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . fusion of M3 + 4 with Cuj. The Text-fig. carpenteri, n. sp.(x8). The insect in the naturalposition of rest. chief purpose of this shortpaper is to demonstrate thispoint, as a preliminary to thecomplete working out of thenumerous undescribed generaand species of this family 272. Text-fig. 2. Dlnotoperla carpenteri, n. sp. Tracheation of wings of last larvalinstar (x48). For lettering, see text-fig. 3, except cu-a, cubito-anal, and sc-r} subcosto-radial trunk trachea. Text-fig. 2 shows the tracheation of the wings in the lastlarval instar of the Hornsby species, Dinotoperla carpenteri,n. sp. By comparing this with the imaginal wing-venation,shown in text-fig. 3, the manner of fusion of M3 + 4 withCul will be clearly seen. In the larval wing, trachea M3 + 4comes off obliquely downwards from the main stem of M,runs alongside trachea Cul for a short distance, and thendiverges from it again, running freely to the wing the imaginal hind wing, the free basal piece of M3 -f- 4 takeson the appearance of a cross-vein descending on to Cuj atright angles, and, consequently, the free distal portion ofM3 + 4, after its fusion with Culf appears as if it were atrue branch of this latter vein. It would, indeed, beimpossible to guess the true condition of these veins
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1878
