1877.] THE MARQUIS OF TWEEDDALE ON BATRACHOSTOMUS. 425 



the external generic characters given by Mr. G. R. Gray for Oto- 

 thrix belong to every other Asiatic species of Batrachoslovms in a 

 greater or lesser degree ; and it seems unnecessary to retain the title. 

 That of Batrachostomus I only hesitate to surrender because I have 

 not had an opportunity of. sufficiently studying all the species of 

 Podargvs as restricted. B. crinitus, it any species, perhaps deserves 

 generic separation, on account of its long naked tarsus and weak bill. 



The following diagnostic table may perhaps assist the ideutifica- 

 tion of the species known to inhabit the Indian region. 



Females, adult uniform rufous, young rufous much striated 

 with brown. Males with mottled, freckled, spotted, striated, grey, 

 brown, tawny, and rufous-brown plumage, or uniform brown upper 

 plumage. A white or else tawny-white nuchal collar in adults of 

 both sexes. 



A. 5 - Wing-coverts unspotted with white. 



Gular collar, pectoral and scapulary 

 plumes white. 

 cJ . Wing-coverts with white or tawny 

 white terminal spots or bands. 



1 . 5 . Major ; white extending to 1 



centre of throat; gape 1*38 > B. cornutus. 



O • 5> >> >J J 



Sumatra, Borneo. 



2. $ . Minor ; white extending to "I 



centreof throat; gape I '12 >■ B.javensis. 



(S . Undescribed J 



Java. 



3. $ . White throat, plumes con- "^ 



fined to the gular collar ; I 



gape 1 • 1 2 r -S- uffinis. 



cJ . White extending to centre of 



throat ; gape 1"12 



Malacca, Burma, Darjeeling. 



B. $ . Wing-coverts with conspicuous termi- 



nal white spots. No white gular 

 pectoral or abdominal plumes. 



O ' J) » >» 



4. $. Rufous; gape 1-31 1 



cJ . Brown or dark rufous-brown > B. stellatus. 



above ; gape 1*31 J 



Malacca, Borneo, Sumatra. 



C. $ . Wing-coverts with conspicuous termi- 



nal white spots. White gular, pec- 

 toral, and abdominal plumes. Sca- 

 pulars rufous. 

 cJ. Wing-coverts, gular, pectoral, and 

 abdominal plumes as in female. 



