144 DR. A. OtjNTHER ON A NEW RODENT. [Feb. 4, 



Hesperid^. 



GOMALIA, n. g. 



Wings short: fore wing with the costa slightly arched at the base, 

 apex acute, exterior margin oblique, posterior angle slightly convex, 

 costal vein short ; subcostal vein five-branched, first, second, and third 

 arising before end of the cell, fourth and fifth from its end ; upper 

 discocellular angled, lower oblique, upper radial from angle of upper 

 discocellular, lower radial from its end ; median vein three-branched, 

 middle branch from near end of the cell ; submedian vein nearly 

 straight : hind wing lobed and angled near base of costal margin, 

 apex and exterior margin very convex ; costal vein extending to near 

 apex, subcostal vein two-branched, one radial ; median vein three- 

 branched. Body short, thorax stout ; palpi thickly pilose ; antennae 

 short, with a thick very blunt club ; legs moderately long, squamous. 



GOMALIA ALBOFASCIATA, n. Sp. 



Upperside dark greyish brown : fore wing with a black transverse 

 basal and a discal band, a small white streak at end of the cell, two 

 lunular spots on the disk and three contiguous spots obhquely before 

 the apex : hind wing with a broad white median transverse band. 

 Underside paler, white markings as above. Palpi white beneath. 



Expanse | inch. 



Hab. Ceylon. In coll. Capt. Wade. 



A single specimen captured between Kirrinde and Werewille be- 

 yond Hambantotte, on the S.E. coast. 



9. On a new Rodent £i-om Medellin. 

 By Dr. A. Gunther, F.Z.S. 



[Eeceived February 4, 1879.] 



(Plate X.) 



The British Museum has lately received from the vicinity of 

 Medellin, Columbian Confederation, through Mr. J. K. Salmon, the 

 skin of a Rodent, which, though evidently taken from a specimen 

 not fully adult and not in perfect condition, represents characters so 

 well marked that it cannot fail to be recognized by the following 

 notes. It is the type of a distinct genus in the family of Octodontidae. 



Thrinacodus, g. n. 



Legs of moderate length ; toes four in front and five behind ; 

 claws small. Eyes small ; ears broad, short, with long sparse hairs 

 round the margin ; nose hairy, except on a narrow stripe in the 

 median hue, which is naked. Tail very long, finely verticillated, but 

 rather densely covered with short stiifish hairs. Fur soft, dense 

 and long. Facial portion of the skull short ; incisive foramina short, 

 but extending into the maxillaries. Molar teeth extremely broad, 

 the anterior in the upper jaw nearly meeting in the middle line, and 



