THE SUBFAMILY LIBELLULINJE. 281 



nodal and 8-9 postnodal nervures, the last antenodal and the first three postnodals not 

 continuous, cells of the postnodal area simple, triangle long and narrow, traversed, very 

 oblique (the base straight), placed a little beyond the level of that of the hind wings, 

 followed by three rows of cells, increasing, no supratriangular nervures, one cross 

 nervure in the lower basal cell, subtriangular space consisting of three cells, sectors of 

 the arculus rising from a point, the lower nodal sector a little waved at the base only, 

 nearly straight beyond the middle and then gradually curved, subnodal sector and upper 

 sector of the triangle nearly continuous, intermediate cells between the nodal and sub- 

 nodal sectors only bisected close to the hind margin ; hind wings broader than the fore 

 wings, with 6 antenodal and 8 postnodal nervures, the first two or three postnodals 

 not continuous, arculus very oblique, its sectors shortly stalked, triangle with its base 

 corresponding with the arculus, and followed by two rows of cells, increasing, no supra- 

 triangular nervure, one cross nervure in the lower basal cell, membranule large, sectors 

 of the triangle united at the base : anal appendages as long as the last two segments, 

 depressed and denticulated beneath to the middle, then thickened and gradually curving 

 upwards to the tips ; lower appendage very broad and short, not half the length of the 

 upper ones, and broadly bifid at the extremity; appendages of the second segment 

 moderate, the three portions of equal length, the tip of the hamulus slender and 

 recurved. 



Type Brachymesia australis, sp. n. 



Genus 29. Deielia, g. n. 

 (Plate LIU. fig. 6.) 



Female. — Frontal tubercle truncated ; eyes contiguous for rather a long space ; 

 abdomen rather stout, hardly thickened at the base, but gradually tapering, a little 

 shorter than the hind wings, segments 2-4 carinated, segment 8 not perfoliate: wings 

 moderately long, rounded at the tips, pterostigma rather long; fore wings with 7-8 

 antenodal and 8-11 postnodal nervures, the first four or five postnodals not continuous, 

 cells of the postnodal area simple, triangle rather broad, on a level with that of the 

 hind wings, traversed, followed by three rows of cells, increasing, no supratriangular 

 nervures, one cross nervure in the lower basal cell, subtriangular space consisting of 

 three cells, sectors of the arculus diverging from a very short stalk, the lower sector 

 nearly continuous from the base to beyond the middle, nodal and subnodal sectors only 

 slightly curved, the second half of the intermediate cells bisected ; hind wings broader 

 than the front wings, with 5 antenodal and 8-9 postnodal nervures, the first four post- 

 nodals not continuous, base of triangle nearly coinciding with the arculus, followed by 

 two rows of cells, increasing, no supratriangular nervures, one cross nervure in the 

 lower basal cell, sectors of triangle rising from a point ; legs long and slender. 



Type Deielia fasciata, sp. n. 

 vol. xn. — part ix. No. 5. — August, 1889. 2 t 



