484 JOURNAL, BOMBAY NATURAL HIST, SOCIETY, Vol. XXVIII. 
is also a vestigial, humeral line represented by a small, triangular spot at the 
upper part of the humeral area. 
Abdomen tumid at the base, the 8rd slightly constricted and thereafter 
cylindrical and parallel sided as far as the anal end. Ground colour ochreous 
brown marked with yellow as follows :—The sides of segments 1 to 3 with a 
moderately broad, lateral stripe not reaching below, a basal spot of yellow on 
segment 1. Segments separated by black annules, segments 4 to 8 with lateral 
whitish blue stripes not extending as far as the apex of the segments, lessening 
in size on segments 6 and 7. Segments 6 to 10 have apical, subdorsal spots of 
the same colour which increase rapidly in size on the latter 3 segments. The 
dorsum of these 3 segments is a much darker brown than the preceding. 
Legs black, the, trochanters, coxze and proximal part of the femora reddish 
brown. 
Anal appendages dark brown, the superior razor shaped, the basal fifths narrow, 
the apical three fifths strongly ribbed on the dorsal surface in its length, this rib 
ending at the apex in a robust sharp hook. 
The blade portion of the appendage is coated with long, inwardiy directed 
hairs. Inferior appendage triangular, four fifths the length of the superior, turn- 
ing up at its end. 
Wings hyaline, the subcostal space in the forewing as far as the node and the 
cubital space for about halfway to the trigone palely saffronated. The hindwing 
similarly so as well as the anal triangle and a large area extending across the 
wing from the trigone to the stigma. Stigma yellow or brownish yellow, mem- 
: f 8--16 16— 9 A 
brane grey, white at the base; nodal index :— 1 9 Wot 4 to5 cubital 
nervures in the forewing, 3 to 4 in the hind, trigone in the forewing 
traversed 3 to 4 times, 3 times in the hind, the proximal nervure in the trigone 
of the forewing never connected to the base of the trigone by another nervure as 
in donaldi, always so in the hind, reticulation closer than in donald?, 
Female closely similar to the male, the ground colour being a paler brown. 
The abdomen more tumid ai the base, not constricted at the 3rd segment but. 
tapering gradually to the anal end. ‘he colouring on the sides of segments 1 
and 2 spreads on to the dorsum. The spots on the other segments are rather 
broader than in the male ane segment 10 is entirely yellow. 
Anal appendages lanceolate, shorter than those of the male. 
Dentigerous plate resembles closely that of Anax, the hinder border being 
subrounded and its surface coated thickiy with minute denticles. 
Hab. Mr. H. V. O’Donel informs me that in the Duars this species is a night 
flyer. Before dusk it flies high but as night falls it descends to lower levels and 
is seen skimming near the ground. Occasionally it comes to light. 
The species appears to have a wide range, being recorded from Bengal, Upper 
Burma, Java, Sumatra, Lombok, Borneo, Formosa and Tahiti. 
Group—AISCHNA. 
Under this heading I have grouped a number of genera which differ rather 
widely in characters but all agree in having Rs (5th nervure) symmetrically 
forked and Rspl (5a) and Mspl (7a) strongly concave towards Rs and M4 (7th 
nervure) respectively so that the two nervures enclose 3 to 6 rows of cells. 
Correctly speaking Anacieschna should be included in this group but on ac- 
count of its intermediate characters I have preferred to assign it a position where 
it links up the two groups Anax and Aeschna. 
The eyes are large, more or less contiguous but usually Jess so than in Anaz ; 
frons moderately broad, occiput usually small and simple; wings long and 
broad, reticulation close, base of hindwing angulated or excavate in the 
male ; dentigerous plate of female and anal appendages of the male markedly 
specialized. 
