312 Dr. A. Giinther on a Barbel from British Gaffraria. 



four decreasing longitudinal fulvous streaks ; pronotura con- 

 siderably broader, its lateral angles more oblique, and there- 

 fore more prominent. Length of body 10 lines, expanse of 

 tegmina 3 inches 1 line. 



Nicobars (3 examples). Type, B.M. 



We have three examples of P.fulvigera ; so that I am satis- 

 fied of the constancy of the characters by which the two 

 species are separated. 



COSMOSCARTA, StSl. 

 Cosmoscarta Biixtoni, n. sp. 



General form of C. xanthorhina ; above purplish black ; 

 head somewhat prominent, centrally grooved in front ; ocelli 

 small, placed in deep excavations on either side of a central 

 carina, which runs to the back of the thorax, the latter granu- 

 lose, barely wider than the closed tegmina, with a distinct 

 marginal ridge, a feeble oblique depressed line on each side, 

 near the posterior border ; tegmina with the basal two fifths 

 almost covered by a broad oblique ochreous band, which 

 crosses the corium ; a narrow, nearly perpendicular, transverse 

 vermilion band just beyond the end of the corium ; body 

 below blackish piceous ; legs chocolate-brown. Length 9 lines, 

 expanse of tegmina 18 lines. 



Sumatra. Type, B.M. 



This and the succeeding species were obtained by Mr. E. C. 

 Buxton in his recent trip to Sumatra. 



Cosmoscarta sumatrensis, n. sp. 



Allied to C. octopunctata, but at once distinguished by the 

 much greater width of the thorax and scutellum, more promi- 

 nent head, duller coloration, the black ventral surface of the 

 abdomen, as of the whole body below ; above testaceous ; 

 thorax shining, very convex in the centre, subdiaphanous and 

 depressed at the sides ; tegmina crossed by black spots, as in 

 strongly marked examples of C. octopunctata ; legs testaceous. 

 Length 10 lines, expanse of tegmina 20 lines. 



Sumatra. Type, B.M. 



XXX. — Notice of a Barhel from the Buffalo River ^ British 

 Gaffraria. By Dr. A. GuNTHER, F.K.S. 



Mr. H. Trevelyan has recently sent to the British Museum 

 several specimens of a small species of barbel from the Buf- 



