514 



ME. E. I. POCOCK ON THE 



Odontopeltis tincentii, sp. n. (PL XXXIX. figs. 4-4 d.) 



Colour chocolate-brown, keels flavous, with a triangular flavous 

 spot on the middle of the dorsal surface of the keel-bearing por- 

 tion ; antenuae ferruginous ; legs and sterna flavous or ochraceous. 

 Smooth and polished. 



$ . Eobust and parallel-sided. Antennce moderately long and 

 slender ; 2ad to 6th segments subequal. 



First tergite as wide as the second and the rest, its anterior 

 border convex ; the keel well-developed, depressed, its anterior 

 angle convex, posterior rectangular and sharp. The keels of 

 the 2nd and 3rd also well-developed, depressed, and contiguous ; 

 that of the 4th much smaller, with its posterior angle strongly 

 produced and dentiform. In the rest of the somites the dorsal 

 surface is not sulcate, the keels rise above the middle, but not at 

 the summit of the side ; they are horizontal but small, with 

 convex anterior angle, acute and produced posterior angle ; the 

 lateral border thickened, especially round the pore, this thickened 

 area defined in front by a conspicuous notch ; lateral surface of 

 somites smooth above, granular below. Anal tergite as in 

 Strongylosoma or Paradesmus. Steimite triangular, with the two 

 tubercles before the apex. The sterna wide, not spined. Legs 

 of moderate length, the trochanter twice as long as the coxa, 

 the tarsus hirsute and much shorter than the femur. 



6 ' Slenderer than $ , but with larger keels. The sternum of 

 the 6th somite excavated. The copulatory feet short, terminating 

 in three subequal prongs, of which the external is stout at the 

 base and very slender and curved distally ; the internal much 

 slenderer at the base but less abruptly narrowed ; the third, 

 situated above and between the others, is almost filiform. 



In the legs the tibia is furnished beneath with a distally 

 directed process, which underlies the proximal end of the tarsus. 



Length of $ 27-5 mm., width 4 mm.; d 26, width 3-8. 



Locality. St. Vincent {H. S. Smith). "Common under 



ru sh." 



This species shows considerable variation in colour : in some 

 cases the median yellow spot on the back is entirely absent, and 

 the yellow of the keels much less pronounced ; in others the 

 yellow patches are so much enlarged that the brown area is 

 reduced to a single large spot on each side. Since, however, 

 these coloured forms do not appear to difler in other respects, I 

 regard all of them as belonging to the same species. 



