4 
PASSE RES 
placed in holes of trees or crevices of rocks and contains in April or May from six to nine eggs, 
which are white, speckled or blotched with reddish. Their food consists of insects and their 
larvz, as well as of various seeds, nuts etc, 
No 
Ow 
8. 
Io. 
KEY TO THE SPECIES AND SUBSPECIES OF SITTA® 
. Pileum and hindneck brown or olive, strongly contrasted with bluish 
grey of back. Wing never more than 7o mm 
Pileum and hindneck never brown or olive, being cither bluish grey or 
black 
. Pileum and hindneck brown, the posterior median portion with a large 
white spot; no white patch on middle rectrices 
Pileum and hindneck olive, the latter without large whitish median spot ; 
middle vectvices with basal half or move of inner web white. 
. Smaller, with pileum and hindneck more deeply olive, the latter with 
whitish ov buffy median spot obsolete ov indistinct ; back more bluish 
grey; adult male averaging wing 65, tatl 34 mm. : 
Larger, with pilewm and hindneck paler or less decidedly wie the latter 
with whitish or pale buffy median spot well developed; back less blush 
grey; adult male averaging wing 67, tail 37 mm, 
. Pileum either wholly black, or at least hindneck and a black, con- 
trasting with bluish grey of back . 
Head above without any black, being bluish grey like bee or slightly 
darker grey than the latter . 
. With a distinct black streak Kiar the lores ti idee the eye to the auricular 
vegion . 3 SN eee 
Whole sides of head white without any black 
. A large chestnut patch on chest. 
No chestnut patch on chest . 
. Pileum and nape glossy black; black ee behind the eye broad and very 
distinct; under parts brighter : throat buffy white, deepening to tawny 
buff or dull ochraceous buff on posterior parts, darkest on flanks 
Pileum only dull black; dusky stripe behind eye narrower, dull blackish 
and sometimes mixed with whitish; under parts buff or greyish buff, 
throat whitish : 2 cha 0 ee eee ee 
Under parts dull greyish buff. Wing about 72, tail about 40 mm. 
Under parts clear buff, without any greyish tinge. Wing not over 70, 
tail averaging 35-38 mm. 
. Larger : wing 67-70 mm.; under yap es buff or Tee cous buf. 
Smaller : wing about 63 mm.; under parts very pale, creamy . 
Under parts paler or darker buff, passing into whitish on chin and throat ; 
Alanks and under tail coverts uniform chestnut. (Both sexes with entive 
crown black.). 
37 
38. 
39. 
24. 
lo 
on 
SL 
to 
4. 
. S.PUSTIDLA. 
. (S. PYGM#A). 
S. PYGMEA PYGMEA. 
S. PYGMEA LEUCONUCHA. 
3 
ize 
10. 
. S. KRUPERI. 
a 
S. CANADENSIS CANADENSIS G*. 
Ser eos 
S. CANADENSIS WHITEHEADI @. 
. of 
. S. CANADENSIS VILLOSA &. 
WM 
CANADENSIS COREA &. 
(S. LEUCOPSIS). 
1) S. yunnanensis Ogilvie-Grant, unknown to the author, could not be included in the key. 
