432 Mr. L. B. Prout on 



Type. Adult male. Original number B. 25. Collected 

 30th May, 1910, and presented by Gr. Fenwick Owen, Esq., 

 in whose honour the species is named. 



This interesting species, the second known of its genus, 

 greatly extends the range of Uranomys, as the first species, 

 U. ruddi } was found on Mount Elgon, British East Africa. 



The external resemblance of U. oweni'to an Acomys is very 

 striking, and a study of the skulls indicates that it is to that 

 genus that Uranomys is most nearly allied, the peculiar struc- 

 ture of the posterior palate being very much the same in 

 both. The shape of the brain-case, however, is very different, 

 while in the unusual throwing forwards of the incisors 

 Uranomys differs as much from Acomys as it does from other 

 African Muridse. 



XLVIII. — New Neotropical Geometridse. 

 By Louis B. Prout, F.E.S. 



[Continued from p. 333.] 



Eupithecia longibasalis, sp. n. 



$ . 18-19 mm. — Head, thorax, and abdomen ochreous 

 varied with brown, face paler j the abdomen with a brown 

 dorsal belt on second segment, and small blackish dorsal 

 dots on succeeding segments ; the crests very ill-developed. 

 Fore wing ochreous suffused with pale brown, darkened in 

 parts with fuscous ; the lines angled below SC, then oblique 

 and parallel ; the darker basal area with its outer angle in 

 cell reaching middle of wing and including the oblique 

 linear black cell-mark ; median area edged inwardly by a 

 whitish-ochreous band with dark central line (the proximal 

 half of the band the clearer whitish) and outwardly by a 

 simple ochreous line, its proximal two-thirds marked with 

 blackish along the veins ; the pale subterminal line irre- 

 gularly crenulate, preceded by patches of fuscous-black 

 scales, met by a pale streak from apex, above which the costa 

 is rather darker ; terminal line thick, black, interrupted at 

 the veins by pale spots ; fringe pale, chequered with olive- 

 grey in basal half. Hind wing whitish ochreous, darker 

 along abdominal margin ; the lines dark, but marked only 

 on abdominal margin. Underside ochreous, in fore wing 

 grey-suffused along costa and termen, where the lines and 



