198 Records of the Indian Museum. [Vor 2a: 
from ‘Bengal.’ He was not acquainted with the male at the 
date of publication of the species (1878). Both the present 
specimens are in poor condition, but fortunately the abdomen 
of the male is complete. I take the opportunity of figuring the 
anal appendages of the male. These bear a close resemDlae 
to the corresponding structures of O. dyak. 
Orogomphus speciosus, de Selys. 
O. speciosus, Selys, Ann. Mus. Civ. Genova (2) x, pp. 481-482 (1891). 
Kirby, Cat. Odonata, p. 79 (1890). 
I @ i150. Lord Carmichael’s collection, Darjiling District, 
1000-3000 ft., May, 1912. 
The male of this species has not been described. 
The dimensions of the specimen are as follows :— 
Length of abdomen 54 mm., of hind-wing 40 mm., breadth 
of h. w. 12°5 mm.; of the type female, length of abdomen 57 mm., ~ 
of hind-wing 46 mm., breadth of h. w. 15 mm. 
eee 
ph el 
Fic. 1.—Profile of anal appendages of O. atkinsoni 2. 
There is thus a considerable difference in size, scarcely 
greater than occurs in other species of the genus. 
In colouring the present example shows the following points 
of parece with the accouut of the type. 
. The occiput is black not yellow. 
it, Abdominal segment 2 is largely yellow above, with a 
transverse black band not touching either extremity. 
iz. Segment 8 shows no lateral yellow spot. 
Venation-formula : 
Anal loop. An. n. Pn. n, M. Cu. t. (cells) supra. t. 
basal post-costal) ».0s - Slee ieee el 77 ee 43 
+ 9—9  20—22 I16—I15 I—1 5—6 2—2 3-3 
23—23 13713 2 (0 | ee 4—4 
2 type sae - on — 
YI 17—19 17—17 2 3-3 44 
In other respects there is close agreement between the charac- 
ters of the male here recorded and those of the female as described 
by de Selys, so that I have little hesitation in referring them both 
to the same species. 
