€ 185.5) 
colour makes it easily distinguished ; plumage, above, is pale grey ; 
white on the throat and wing-patch or band, as it looks more like ; 
some white on the tail, imer web of the feathers; wings and _ tail 
are brownish black. This is about as much of black and white, 
which can be observed from a distance. The rest of the plumage 
is pure sulphur yellow, chiefly on lower parts of the body. Occa- 
sionally tinged green ; upper tail coverts pale yellow, also edges of 
the wings, tertiary feathers. In summer the yellow plumage be- 
comes darker in colour. In spring this bird, usually ascends to 
Tongloo and like altitudes to breed, occasionally I have noticed 
Sulphurea building its nest on sides of the Jhoras in the outskirts 
of Darjeeling, near the ground at foot of scraggy looking water worn 
bushes growing among perpendicular rocky cliffs by the side of 
mountain torrents. Nest is neatly made, constructed of moss and 
fibres, lined with soft materials, wool and hair. Eggs are brownish- 
white, mottled and clouded all over with brownish yellow, here and 
there fine black hair like lines twisted about the large end. 
Sulphurea is often seen on the road, feeding on insects, as though 
a bit tired of restricting its surroundings to hill streams and cold 
jhoras. When on roads, it runs with ease. Constant vibration of 
the tail is even more noticeable than with previous species. 
FIELD WAGTAILS 
GENUS Bupyres, differ but little, outwardly from the two 
proceeding groups. Tertiary feathers, which were observed to be 
lengthened in the former birds, are shorter in Budytes ; tarsus stouter 
and stronger ; typically, hind toe and claw are lengthened, which 
shows an affinity Field-wagtails have to larks and pipits, also in the 
longer tarsi. 
(593) Bupyres viripis, Indian Field-Wagtail. In this species 
we have birds of gregarious habits. They are usually found in 
flocks on pasture lands in company with cattle which may be seen 
grazing beside villages in Bengal, and homesteads in the district, 
wheve I have frequently observed them. They pass over Darjeeling 
in large flocks, settling for a few days to rest and forage about our 
erassy hill sides, before proceeding on their journey, about April, for 
higher altitudes to breed. On their return the latter end 
September, they break journey again, with their flocks considerably 
augmented three or four times the size, containing many young birds, 
strong and lively on the wing, with all, suspicious and easily scared, 
inexperienced in the occasional, good intentions of human beings. 
I have often seen, in Darjeeling, the greater part of an immense 
flock chiefly of these birds and Pipits, larks etc. alight close to the 
house, then without any apparent, warning, sweep up again in to the 
