252 Mr. R. Swinhoe on Formosan Ornithology . 
In the spring, at Tamsuy, N.W. Formosa, I witnessed the 
arrival of large numbers of Caprimulyidcs , which I took for this 
species. Like most of the Goatsucker group, they skulked about 
the roots of the bushes on the hill-sides during the day, and then 
required almost to be trodden upon before they would spring. 
When they rose, they dashed away with uncertain flight for a 
short distance and then fell, sometimes among bushes, but often 
on the bare ground, flapping and running awkwardly under the 
nearest cover of a stone or tuft of grass. On their first arrival, 
while the weather was still fresh, they frequented the banks 
of a hot sulphur-spring, where the steaming exhalations 
heightened the temperature and imparted to the atmosphere a 
disagreeable sulphurous odour. The birds, though in good con¬ 
dition, seemed to shrink from the cold, and sought the friendly 
warmth of the ravine, regardless of the deleterious smell, thus 
proving that they had sought these latitudes from a warmer 
climate. 
I subjoin the description of another female, shot 10th October, 
1861, at Taiwanfoo, which differed somewhat from the last in 
being paler and less distinctly spotted. 
Length in.; wing 7^; tail 4^, of ten feathers. Bill 
brownish flesh-coloured, largely tipped with blackish brown. In¬ 
side of mouth flesh-colour. Rim round the eye broad and smooth, 
clear ochre. Ear-conch large and triangular, with the vertex 
uppermost, the aperture exposed through abroad perpendicular 
slit. Tarsi naked ; legs dark madder-brown, with whitish edges 
to scutes and whitish soles to feet; claws blackened, pecten 
whitish. Scapulars broadly edged with creamy burnt sienna. 
Wings closing to within ^ in. of end of tail. 
Heart T 7 ^ by ^ in. Yellow fat covering the belly. Liver very 
small, right lobe ^, left (Esophagus thick and fleshy, ^ in. 
wide; proventriculus ^ by Stomach I in. by deep, of 
an irregular oval, with tendons little muscular; epithelium thick 
and leathery, ochreous,furrowed deeply in different directions, and 
containing remains of Coleoptera (chiefly Cetoniat). Caeca ^ in. 
from anus, right 1^, left both bulging into black sacs, ^ a t 
broadest, and tapering at the ends. Intestine 7j-q in. long, varying 
from to Ovary with numerous small eggs. 
