. The Australian zoologist. Zoology; Zoology; Zoology. TILL YARD AND FRASER. 165 Genera:—Metacnemis Selys, Mesocnemis Karsch, Calicnemia Strand, Stenocnemis, Karsch, Platycnemis Charp., Copera Kirby, Coeliccia Kirby, Indocnemis Laid., Idiocnemis Selys, Paracnemis Martin, Leptocnemis, Kirby, Allocnemis Selys, Tatocnemis Kirby, Risio- cnemis Cowley. This family is unrepresented in Australia. Family 10. Coenagriidae Tillyard. (Figs. 26, 27.). Family Coenagriidae Tillyard, 1926, Insects of Australia and New Zealand, Fig. 26. This family which is the most successful line of specialization with
. The Australian zoologist. Zoology; Zoology; Zoology. TILL YARD AND FRASER. 165 Genera:—Metacnemis Selys, Mesocnemis Karsch, Calicnemia Strand, Stenocnemis, Karsch, Platycnemis Charp., Copera Kirby, Coeliccia Kirby, Indocnemis Laid., Idiocnemis Selys, Paracnemis Martin, Leptocnemis, Kirby, Allocnemis Selys, Tatocnemis Kirby, Risio- cnemis Cowley. This family is unrepresented in Australia. Family 10. Coenagriidae Tillyard. (Figs. 26, 27.). Family Coenagriidae Tillyard, 1926, Insects of Australia and New Zealand, Fig. 26. This family which is the most successful line of specialization within the whole suborder of Zygoptera, contains a very large number of genera and species, all of which present very much the same general appearance and type of venation. Nodus at about one-third the wing-length from base, never as little as one-fourth. Pterostigma always short, usually covering only one cell, more rarely two, sometimes less than one cell's length, variable in shape but mostly rhomboidal or trapezoidal. Transverse series of cross-veins distal to level of nodus almost always very complete, being only interrupted by the zigzagging of the distal portions of veins MA and 1A, with sometimes additional zigzagging of the distal portion of 1R3 also. Postnodals comparatively few in number, from five to twenty, but usually less than twelve. Veins 1R3 and R4 + 5 arising close together at or near subnodus; in most of the genera, 1R3 arising at the subnodus and R4 + 5 slightly proximal to it. 1R2 and R3 arising more distally, separated by from one to four cells. Discoidal cell with distal angle acute, the anterior side little more than half as long as the posterior. Veins CuP and 1A always well developed. Subcoidal cell always complete, usually entirely free from the posterior margin of wing but sometimes partly sessile on it; in shape it is elongate, from one and a half times to nearly twice as long as the discoidal cell. Most of the species rest with the wings folded toge
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1914
