416 R. I. POCOCK 
The wrinkling of the tergites is subject to much variation. 
In some Ceylonese specimens which the Museum has lately 
received from Mr. E. E. Green the tergites are very strongly 
wrinkled; but those from Palon are much less wrinkled and. 
the single example obtained at Moulmein is almost smooth. Very 
little reliance, indeed, can be placed upon the corrugation of 
the tergites in this genus, and in this instance it most certainly 
is not a sign of affinity, as Dr. Haase imagined, between Ot. cey- 
lonicum and Ot. rugulosum. The latter, as already pointed out, 
is closely allied to Ot. carinatum, and Ot. ceylonicum falls into 
one group with Ot. splendens and Ot. morsitans — two species 
from Madras, which I described in the Annals and Mag. of 
Nat. Hist. (6), V, pp. 245-246, 1390. 
The first named, however, has much longer and stronger 
anal pleurae, and no spur on the tarsi of the 20 pair of legs; 
while the second has spicular tergites and the sternites laterally 
and not mesially impressed. 
17. Otostigma feae, sp. n. 
Colour pale olivaceous, smooth and shining with metallic 
lustre. 
Head plate sub-circular, minutely punctured, not sulcate. 
Antennae of moderate length, composed of 18 segments of 
which the basal two are bare and the rest pubescent. 
Maxillary sternite and feet scarcely punctured, the prosternal 
plates, small, not contiguous, each furnished with three blunt 
teeth, whereof the two internal are fused together; basal tooth 
conspicuous, with a single small lateral nodular denticle. 
Tergites scarcely punctured, in the posterior half of the body 
lightly wrinkled, from the fourth bisulcate, from the eleventh 
or twelfth marginate. 
Sternites not bisulcate, each marked with a median posterior 
impression, those in the middle of the body furnished mesially, 
in addition, with three fainter impressions arranged in a transverse 
row. 
