652 Letters, Announcements, Notes, ce. 
the bill about 28-30°5 mm., exceptionally reaching to 31 mm., 
and the length of the bill from the eye is less than 114 mm. 
In C. gankowskii the greatest breadth of the bill is 32-36 mm., 
rarely 31°5 mm., and in only one specimen (of the seventy) 
30°75 mm., but then this specimen has the bill from the eye 
122 mm. long. Even in quite young birds this broad bill 
is a reliable character, as will be seen from the table of 
dimensions given below. 
C. bewicki breeds from the Lena Delta westwards. Among 
nine specimens labelled “Lena Delta” four are true C. bewicki 
and the others C. jankowskit. In the following table the 
dimensions (in millim.) are taken from old birds, except two 
quite young ones ; the young C. jankowskii is from the Lower 
Yana, and the young C. bewicki from Turukhansk on the 
Yenesei. The Yana bird is somewhat younger :— 
SPECIES ia ore ci kw C. bewicki. C. jankowskii. C. musicus. 
INDO ey eivele nk oadas Old. Young. | Young. = Old. Old. 
VAM SrctAtveracan wits s 500-520 425 400 490-550 .| 570 -610 
Exp. culmen...... 92- 95 57 54 90- 99 97 -121 
( from eye ..... 99-1138 96 90 108-126 119 -136 
= } from nostrils... 89- 41:5 382 31 38-— 42°5 42 - 51 
PEAIBDIGAG! ajcsiejes.% 28- 81 24:2] 24:5 30°75- 36 32:5- 34 
UL) ae See 39- 43 31 27 37— 48 41 —- 515 
PRATSUG gs rf oN ecece 104-117 104 | 98 102-114 115 -124 
Mid. toe w. claw .. 127-189 118 114 126-142 150 -164 
About the habits of C. jankowskii and its curious dancing- 
performances during the breeding-time, as observed in the 
Kolyma Delta, I hope to be able to tell you when not so much 
pressed by other work. 
I am, Sirs, yours &c., 
Wesenberg, Esthonia, Russia, S. A. Burur.in. 
July 22nd, 1907. 
Srrs,—In the last number of ‘The Ibis’ (above, p. 379) a 
“ Coriphilus cyaneus” is described and figured as a new species. 
I cannot say whether this is really a new species, but even if 
such be the case the name cannot stand, as there is already 
