652 Mr. J. D. D. La Touclie on the [Ibis, 



district. It passes from the middle of May to the first 

 days of June, and iVon; about the 20th of September 

 until the middle of October. Most of the autumn birds 

 are in fresh-moulted pale plumage (//. incerta D. & O.), 

 as are also most of those taken or noticed in spring. 

 Examples in olive and bright buff-yellow plumage are to be 

 seen in autumn but less counuonly. This Bush- Warbler is 

 a very shy bird, and if it is at all suspicious of danger, 

 keeps itselt well concealed in bushes and high grasses, 

 constantly uttering a nervous " twit-twit.'^ In 1912, from 

 the 19th of September to iiie end of the month, it was very 

 abundant and swarmed all over the island. 



Total length of a male with pale under parts 5'65, 

 wing 2m3, culmen 3"5, bill from gape 5-5, tarsus 0*88, 

 tail 2'25 in. Females are much smaller. 



The soft parts of tliis bird were as follows : — Iris dark 

 brown; upper mandible very dark livid green; lower 

 mandible deep greenish yellow, green towards the tip ; gape 

 and mouth yellow; legs warm gamboge; front of tarsus 

 brownish. 



88. HerMvocula fiiscata (Blyth). 



Fhyllopiieiiste fuscata D. & 0. p. 267. 



Herbivocula fuscata La T. p. 568. 



The Brown Bnsh-Warbler is a very common migrant. It 

 passes from about the 20th of April to the end of May, and 

 from the beginning of September to the latter half or end 

 of October. 1 have one shot at Shauluiikuan as late as the 

 18th of November. 



This bird shows considerable variation in the tints of the 

 lower plumage and in its proportions. It is a busli- 

 frequeuting species, fond of damp places, and it seeks its 

 insect-food on the ground or close to it. 



39. Phylloscopus borealis (Blasius). 

 Phyllopneuste borealis D. & O. |). 271. 

 Phylloscopus borealis La T. p. 569. 



The Arcti(; "Willow-AVarbler is coniuion from tlie middle 

 of Mav to well on in June, and from about the 10th of 



