246 Mr. K. I. Pocock on 



moreover, in ceylonicum the tarsus of the preanal leg is armed 

 with a spur, the pleurae terminate in a single spine, and 

 the anal tergite has a different form. 



Otostigma morsitans, sp. n. 



Colour olivaceous, legs and under surface paler, not or 

 hardly metallic. 



Head-plate wider than long, not narrowed behind and not 

 sulcate, sparsely but somewhat deeply punctured. 



Antennas short, composed of seventeen segments, whereof 

 the ba.-al two are naked and the rest pubescent. 



Maxillary sternite punctured like the head, prosternal 

 plates short, in contact, and obscurely divided into four teeth ; 

 basal tooth of the maxillipedes bearing two feebly developed 

 teeth. 



Tergites very finely and closely punctured and also fur- 

 nished with larger and more scattered punctures ; from the 

 sixth bisulcate, from the eighth marginate, and from the fifth 

 wrinkled laterally ; in the posterior half of the body the ter- 

 gites are wrinkled also in the centre and those in about the 

 hindmost third of the body are armed with many irregularly 

 arranged spicules. 



Sternites punctured like the tergites, not bisulcate, but 

 furnished with two impressions on each side of the middle 

 line in the centre of the plate and a much fainter impression 

 in the middle of its posterior border. 



Anal somite. — Sternite with nearly straight converging 

 sides and very lightly concave hinder margin ; pleura? thickly 

 and finely punctured, bearing a single well-developel spine 

 in the middle of the posterior edge, the process very short 

 and armed with two apical spines ; legs moderately long and 

 slender, tarsus unspined, femur armed with only five spines, 

 situated on the under surface — two of these form an internal 

 and three an external series ; tergite bearing a median keel 

 in its anterior half, scarcely impressed behind. 



Legs. — Proximal tarsal segment of all the legs, including 

 the preanal pair, armed with a single inferior spur and some- 

 times also with an anterior spine. 



Length of largest specimen 61 millim. 



This species is also closely allied to 0. ceylonicum. It 

 differs, however, in having a very short pleural process ter- 

 minated by two spines and in having the spines on the anal 

 femora confined to the under surface. In having the poste- 

 rior tergites covered with spicules it resembles 0. carinatum } 

 but with this species it cannot be confounded. 



