ART. 7 NEW SIAMESE FISHES SMITH 9 



with a broad bright vermillion margin; caudal fin. pale green, the 

 central part and the posterior margin scarlet; anal fin scarlet at 

 base, a medial band of deep green, the distal half chrome orange, 

 with a narrow sky-blue edge; ventrals pale yellow at base, merging 

 into pale gree distally ; pectorals pale green, the first ray darker and 

 sharply defined. In formalin, the lateral bands remain distinct, but 

 the red color becomes white and the blue becomes blackish. 



Type. — A male specimen 32.5 mm. long over all, taken in a 

 waterfall stream at Pliew, Chantabun Province, Southeastern Siam, 

 April 9, 1925. Cat. No. 90290, U.S.N.M. 



Paratypes. — Five specimens taken at same place and date, 4 of them 

 males from 30 to 32.5 mm. long, 1 a female 37.5 mm. long with ripe 

 eggs. 



Remarks. — This species falls in the subgenus Brachydanio of 

 Weber and Beaufort, characterized by having the lateral line incom- 

 plete or absent and 7 branched rays in the dorsal fin. It is one of 

 the smallest members of the genus, apparently surpassed in diminu- 

 tiveness only by D. nigrofasciatus Day from Burma which does not 

 exceed 25 mm. 



The fish is thus far known only from the waterfall stream at 

 Pliew, where it was collected by Luang Masya Chitrkarn, of the 

 Siamese Department of Fisheries. The fish seems to be restricted 

 to the upper part of the stream where it flows over and among boul- 

 ders and between banks densely overgrown with trees and other 

 vegetation. ^ 



The only species of Dcunio heretofore recorded from Siam is D. 

 aequipinnatu^ (McClelland), of India, Ceylon, and Burma, known 

 only from the Nakon Sritamarat Mountains in Peninsular Siam.^ 



LABEO BICOLOR, new species 



Description. — Form elongate, moderately compressed, depth 3.5 

 in standard length ; head slightly less than depth, subconical ; snout 

 obtusely pointed, overhanging the mouth, and with a small lobe and 

 a deep groove on each side ; eye in the middle of length of head, 4.5 

 in head, 1.5 in snout, and somewhat less than 2 in the strongly 

 convex interorbital space ; mouth moderate, transverse, a long post- 

 labial groove extending straight backward; 2 pairs of barbels of 

 equal length, about equal to eye, the rostral pair close together, sep- 

 arated by a space equal to half eye and extending to angle of mouth ; 

 scales in lateral series 34, in transverse series 6-1-7, scales before 

 dorsal 11, scales around caudal peduncle 16; lateral line nearly 

 straight. 



= See Journ. Nat. Hist. Soc. Siam, vol. 6, p. 153. 



