IQI5.] F. F. LaiwLaw : Oriental Dragonfiies. 339 
Abdomen 7 I9 mm., 2? 19mm. Hind-wing 7 20 mm., 9 21 
mm. 
Venation characters (see text-fig.). 
Wings relatively shorter and broader than in the other species 
of the genus. Triangles and supratriangles normally uncrossed. 
Cubito-anal (median) space of hind-wing with three cross-nerves. 
Discoidal triangles in both wings followed by a single row of cells; 
supplementary radial sector feebly developed. Base of wings tinged 
with yellow to level of discoidal triangles. 
@ Lower lip cream-colour edged with black. Upper lip, 
post- and anteclypeus and vertical part of frons also creamy-yellow ; 
upper surface of frons, vertex, and occiput metallic green. 
Prothorax black. 
Thorax dorsal surface black with a broad greenish yellow 
humeral stripe on either side; inter-alar space brick-red. Lateral 
surface brownish yellow with two well-defined dark bands on 
either side, ventral surface yellow. 
Abdomen. Segments 1, 2, 3 brick-red, the last with a narrow 
black terminal ring. The remaining segments black, 4-7 with a 
basal yellow ring, most marked laterally, and progressively smaller 
from before backward. 
Legs black, first pair of femora with a yellow line on their pos- 
terior side. 
Anal appendages black, rather short, upper pair regularly 
curved downwards, moderately stout. Lower appendage a little 
shorter than the upper pair. Resemble in general the appendages 
of A. curvistyla, Selys. 
Genital structures on segment 2. Anterior lobe very small, 
hamulus on either side with a fine backwardly directed spur. 
Lobe of segment 2 small, triangular, curved a little forward. 
? Head coloured as in the male. 
Prothorax pale yellow. 
Thorax brownish black anteriorly, with a pair of very wide 
pale yellow ante-humeral bands, much larger than those of the male 
and united above at the base of the wings. The rest of the thorax 
is pale yellow in colour. 
Abdomen. Segments I, 2, 3 pale yellow, 3 with a fine black 
terminal ring, 4-8 yellow at the base, the apical half of the segment 
(two-thirds in 8) black; the yellow ring divided dorsally by a fine 
black line along the mid-dorsal carina. Segments 9g, 10 entirely 
black. 
Legs as in the male, anal appendages black. Lateral margins 
of segment 8 not widened. Valvulae vulvae very small. 
Distribution : Southern Peninsular India. 
