904 JOURNAL, BOMBAY NATURAL HIST. SOCIETY f^VoL X.\ VIII. 
Dentigerous plate shaped like a hay fork, the two prongs in extension of the 
produced sides of the 10th segment. 
Anal appendages shorter than those of the male and broadening towards the 
apex internally, reddish brown, the hairs on the inner side not so evident. 
Hah. The type and many other specimens were taken in the Empress 
Gardens, Poona, hiding up under the drooping branches of mango trees or cling- 
ing to the inside of green hedges. They took to the wing about dusk and con- 
tmued flying to long after dark. 1 have since received specimens from Mr. 
Hearsey, from Palghat, which do not differ in any way from the Poona examples. 
StiU more recently I have taken the insect and seen it widely scattered through- 
out the Nilgiris at elevations of over 7,000 ft. At this altitude, being cooler, it 
appears on the wing at about half past two or three and continues on the wing 
until about six when it apparently grows too cold for it. I have seen them 
hovermg at about a foot from the ground, in front of deodar hedges around the 
Ooty lake or describing figures of eight at a few inches from the ground, when 
they were well nigh invisible. Tropical, crepuscular dragonflies apparently 
become diurnal in colder climates. 
Gynacantha khasiaca, Maclachlan, Ajin. Mag. Nat. Hist. (6), p. 429 (1895) ; 
Laid. Rec. Ind. Mus., Vol. VIII, p. 340 (1914) ; Martin, Cat. Coll. 
Selys, pp. 202-203 (fig. 207), XIX, XX (1909). 
Male. Abdomen 54 mm. Hindwing 45 mm. 
Head. Eyes very large and broadly contiguous, green, paler below where 
they have a yellowish tint ; occiput yellow ; labium and lower part of labrum 
ochreous, the rest of face olivaceous with a slight ochreous tinting. Above 
Irons a black, T- shaped mark on a greenish backgroimd. 
Prothorax and thorax bright olivaceous green, the hind, lateral suture brown 
and a brownish tinting of the dorsum. 
Legs black, bases of femora and tibiae reddish brown. Hind femora with rows 
of robust, closely-set, gradually lengthening spines. 
Wings hyaline or in adults more or less deeply enfumed ; stigma light brown, 
braced, rather large ; 5-6 cells in trigones of forewing, 5 in the hind; nodal 
18-27 I 25-17 
index ; hvpertrigones traversed 7-8 times in the forewing, 5-6 in 
20-19 I 18-19 
the hind ; loop with 8 cells but its limits very obscure ; 7 cubital nervures in the 
forewing, 6 in the hind ; membrane very small, white. 
Abdomen very long and slim, tumid at the base, markedly constricted at the 
base of the 3rd segment, cylmdrical and of even width thereafter. 
Blackish brown, segment 1 pale on the dorsum, a broad, green spot on the sides, 
2 with the dorsal carina narrowly green and a transverse stripe about its middle 
of the same colour vdiich does not quite meet the green on the carina, apically 
there is another green patch, whilst the oreillets and the sides are turquoise blue, 
except for a small spot of green beneath the oreillet, segment 3 has the basal and 
lateral part turquoise blue, whilst segments 3 to 6 have medial, transverse, green- 
ish marks and yellowish, apical markings on the dorsum. 
Anal appendages black, very long and slim, the inferior being about three- 
fourths the length of the superior. The latter are a little expanded at the apex 
where they end in a fine, long inwardly curved point. 
Female very similar to the male, the appendages shorter. 
This species is easily distinguished from all others by the relatively great length 
of the inferior anal appendage, about-three fourths that of the superior (in no 
others does it reach more than half the length of the superior)' The type is from 
the Khasia Hills, but it has also been reported from the Abor Country and I have 
a specimen from Lower Burma. The above description is taken from this 
