700 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVIII. 
the insect might be a night-flyer as is its cousin A. jaspidea, but all in vain. 
During the past week I have found it breeding in marshes at Avalanche, 
Nilgiris, and such spots are probably its natural habitat as all standing waters 
in these and the Palni Hills are artificial and of comparatively modern forma- 
tion. I have now a large number of larvae and should be able to breed out some 
males in the next few months thus settling the identity of this puzzling insect. 
4. Gynacantha o’doneli, sp. nov. 
A single male from Hasimara, Duars, Bengal, collected by Mr. H. V. O’Donel. 
Male. Abdomen 41 mm. Hindwing 39 mm. Anal appendages 4 mm. 
Closely resembles G. millardi, Fras., from Poona and Malabar, but differs 
from it by the 3rd segment being more constricted, by all four wings being uni- 
formly enfumed and by its much smaller size which is equivalent to G. saltatrix, 
Martin. The relative sizes of abdomen and hindwing are however different, 
being 42-35 in saltatrix to 41-39 in o'doneli, and the dark T-shaped marking on 
the upper surface of the frons is absent in the latter. 
The thorax is an uniform, olive green, paler below and with no traces of 
humeral bands. 
Legs very pale brown with black spines. 
Abdomen olivaceous green and brown marked vuth darker brown and black, 
apical rings at and towards the end of the segments. The first 2 segments are 
largely olivaceous green especially on the sides. The oreillets are large and robust 
and bear 5 to 6 robust spines on the posterior border. 
Wings (very ragged in this specimen) deeply enfumed ; nodal index : — 
13-22 I 18-13 
; trigones with 5 cells ; hypertrigones traversed four times ; 
16-14 I 1.5-15 
4-5 rows of cells between Rspl. and Rs. 3-4 between Miv. and Mspl. ; mem- 
brane absent ; anal triangle of 5 cells ; stigma dark golden brown, over 3-4 ceils 
braced. 
Anal superior appendages long and slender, almost straight on the outer 
border, a little dilated after the 1st quarter inw'ardly, fringed with long hairs, 
black and inwardly directed and meshing with those of the other appendage. 
Inferior appendage triangular, nearly half the length of the superiors. 
5. Amphithemis nigricolor, sp. nov. 
One pair from Hasimara, Duars, Bengal, collected by Mr. H. V. O’Donel. 
Male. Abdomen 23 mm. Hindwing 23 mm. 
Head. Labium, labrum and epistome creamy white ; frons and vesicle 
metallic blue ; occiput black. Eyes reddish browm. 
Rest of body, thorax, abdomen and legs matt black, except abdominal segments 
2 and 3 which are quite white with pruinescence. There is also some slight 
pruinescence on the tergum. 
Wings hyaline ; stigma narrow, very dark brown, non-braced, over about 2 
cells ; extreme bases of wings slightly saffronated ; membrane very small, 
cinereous ; 2 rows of cells in the beginning of the discoidal field ; trigones entire ; 
subtrigones traversed once as also the hypertrigones ; Mspl. absent ; 1 cubital 
8 - 11 — 12-8 
nervure to the forew'ings, 3 in the hind ; nodal index ; the base of 
9-9—10-7 
the hindwing very narrow, bevelled sharply off, no vestige of a loop. 
Anal superior appendages resemble those of A. vacillans in shape, but the 
superior are only slightly longer than the inferior. 
The abdomen is very slender, cylindrical and of even length throughout. 
Female. Abdomen and hindwdng 23.5 mm. 
Very similar in shape to the male but slightly stouter and without its dainty 
elegance. The wings are broader, especially the hind where a distinct loop of 
7 cells is found. 
