190 Notes on Severtzoff’s ( Fauna of Turkestan.’ 
Vertical range. Breeds in districts 1, 2, and 3, rarely in 
the first. 
In a MS. note at page 145, Dr. Severtzoff writes as fol¬ 
lows :—My C. pattens is a somewhat doubtful species, and 
may prove identical with a Chinese specimen in the Paris 
Museum labelled Caprimulgus stictomus, hut which Mr. Swin- 
hoe considers to be merely a pale specimen of C. monticola, 
and says that the true C. stictomus is confined to Formosa, and 
does not occur on the mainland of Asia. I have taken an 
accurate description of the Paris bird to compare with my 
specimen, which is in Russia. The pale form of C. europmis, 
from the Ural river, is not intermediate between C. europceus 
and my C. pattens. This pale form I have found breeding 
on the east side of Lake Aral, and near the Lower Oxus, where 
the bird runs rather smaller than in Europe, but in coloration 
it is identical with Ural examples. It would be well to com¬ 
pare these with C. indicus , Lath., and C. mahrattensis, Sykes, 
as the matter requires further investigation.^ 
240. Caprimulgus arenicolor, Severtzoff, Ibis, 1875, p. 
491. 
Caprimulgus isabellinus , Temm.; Severtzoff, p. 68. 
Horizontal range. Breeds in districts III. and IV., rarely 
in the former. 
Vertical range. Breeds in district 1. 
A careful description of this species is given in f The Ibis y 
(/. c.) by Dr. Severtzoff, who, in a MS. note, gives me the 
following particulars :—“ There is no constant difference in 
colour between the young and old birds; but the former are 
recognizable by their laxer plumage on the body. This lax 
plumage is moulted in July, soon after the young leave the 
nest, and when they are in family parties with their parents; 
and, judging from these parties, two or three young are reared 
from each nest. About the end of August these family parties 
break up; and then the young have lost the immature plumage, 
except as regards the under tail-coverts. After leaving their 
parents they are found in pairs; and the old birds leave the 
Lower Oxus about the first half of September, the young re¬ 
maining till the end of that month, and some few until the 
