158 BULLETIN 188, UNITED STATES NATIONAL MUSEUM 



of the National Museum contains over 100 specimens obtained by H. M. 

 Smith and H. G. Deignan in 1934, 1935, and 1936. These came from 

 Huey Melao, a brook on Doi Hua Mot ; Menam Lu and other branches 

 of the Mechem (tributary to the Meping) , collected by A. B,. Buchanan ;' 

 the Menam Kok, an affluent of Menam Mao and small affluents of the 

 Menam Fang (tributary to the Mekong) ; and Huey Nam Puat, a tribu- 

 tary to the Mekong in French Laos. 



In a lot of four specimens 5.1 to 6.4 cm. long from Huey Melin, a 

 brook flowing into the Menam Mao, the two largest fish show a narrow 

 black edge on the outer ventral rays but apparently differ in no other 

 way from typical examples. 



This is a small fish, apparently getting little larger than 10.5 cm. 

 One of the topotypes was a female 7 cm. long with well-developed 

 ova. 



The species seems normally to have four barbels, of which the rostral 

 pair are always the longer. The barbels are, however, subject to varia- 

 tion. The length of the rostral barbels ranges from one-half to one 

 eye diameter. In some series the maxillary barbels are invariably 

 present; in other lots (as in a series of three specimens from Huey 

 Nam Puat, just over the border of Siam in French Laos) the maxillary 

 barbels are absent; and in a series of 5 specimens taken by Deignan 

 in the Huey Nam Hu Puang, an affluent of the Menam Mao, December 

 25, 1936, the maxillary barbels are absent on either one side or both 

 sides. 



It would appear that Barilim huddhae Fowler is this species. The 

 body proportions, squamation, fin formulae, origin of the dorsal fin 

 slightly posterior to origin of anal, etc., are in agreement. The colora- 

 tion is not essentially different, and among a large series of specimens 

 of B. pulchelliis some are found that closely approach or entirely con- 

 form with the markings described in B. huddhae. 



Among the mountain people of Thailand this fish shares with others 

 of the genus the name pla nam Tnuh (ink fish), probably in allusion to 

 the black blotches on the sides and the jet-black interradial membranes 

 of the dorsal fin. 



BARILIUS INFRAFASCIATUS Fowler 



BariUus infrafasciatus Fowleb, 1934a, p, 141, figs. 114, 115 (Metang), 



Known from a number of specimens taken in the Metang, a tribu- 

 tary of the Meping, in Northern Thailand. 



The type and longest example is 10 cm. long. 



Fowler suggests that this form may be Sauvage's most inadequately 

 described B. ornatus (q, v,), but the differences are too marked to 

 warrant the union of the two. 



