| 

Wilks 
4 
Oo 
14. 
Ge 
16. 
1g. 
. Slightly larger, 
PAM. SITTIDZ® 
Under parts white ov greyish white; flanks tinged with brownish ; under 
tail coverts white, edged and tipped with light chestnut . 
Under parts paler, clear buff. Larger : wing 76-81, tail 42-45 mim. 
Under parts darker, deep ochvaceous buff. Smaller : wing 70-73, tail 
4O-45 mm. 
. Black markings on greater upper wing coverts and tertials larger, more 
s § 
sharply defined, deeper black, move conspicuously contrasted with the 
clear bluish grey of marginal and terminal portions, the black space 
web of third tertial with its postercoy extremity broadly 
rounded . 
on outer 
Black markings on greater upper wing coverts and tertials less sharply 
defined, duller black, less conspicuously contrasted with the duller grey 
of marginal and terminal portions, the black avea on outer web of thivd 
tertial with ats posterior extremity narrowly pointed or acummate . 
with bill relatively shorter and stouter; black central 
spaces of greater wing coverts and black areas on tertials more restricted ; 
under parts more purely white, the sides and flanks faintly, if at 
all, tinged with grey; adult female with pileum usually blush grey, 
strongly contvasted with black of hindneck . . : 
Slightly smaller, with bill relatively longer and narrower ; black central 
spaces of greater wing coverts and black areas on tertials more extended ; 
- under parts duller oy more greyish white, the sides and flanks strongly 
greyish; adult female with pileum often glossy black like hindneck. . 
Smaller : wing averaging less than go mm., with under parts moze 
BUTE ly ia ite Pay ie Seek 2 
Larger ; wing averaging more than go mm., with under parts less 
purely, more greyish white. . . 
. Larger, especially the fect; bill propor irate more slender; grey tup 
and white subterminal patch of lateral rectrices averaging broader ; 
adult male averaging wing S7, tail 46 mm... : eae 
Smaller, especially the feet; bill relatively stouter ; grey ie and white sub- 
terminal patch of lateral rectrices averaging narrower; adult male 
averaging wing S6,tml 44mm. . . . 
. Under parts paler, sides and flanks more fairly Teed with grey; bill 
averaging longer, about r9-20mm. . . . . .« Sa) adit 
Under parts darker, sides and flanks nearly so dark grey as back; bill 
averaging shorter, about r7-I8S mm. . . . . 
Under tail coverts with more or less chestnut . 
Under tail coverts without chestnat 
Under parts deep cinnamomeous oy chestnut, sometimes paler, oy even 
whitish, on chinand throat. . . . 
Under parts never cinnamomeous or chestnut, being either white, buff, 
ochyaceous, or greyish, often parti-coloured of two of these tints. Under 
tail coverts merely edged oy tipped with chestnut. . . . . . . 
Under tail coverts grey with a large, white subterminal spot surrounded by 
a distinct chestnut or ferruginous margin. . . . 
S) 
. (S. CAROLINENSIS). 
29. S. LEUCOPSIS LEUCOPSIS. 
30. S. LEUCOPSIS PRZEWALSKU. 
5 Teo 
14. 
I. S. CAROLINENSIS CAROLINENSIS. 
32. S. CAROLINENSIS ATKINSI. 
33. S. CAROLINENSIS ACULEATA. 
34. S. CAROLINENSIS LAGUNZ. 
35. S. CAROLINENSIS NELSONI. 
36. S. CAROLINENSIS MEXICANA. 
at pe RA oe sts 
; 38. 
4 IQ. 
: 5 22h 
aoe: : 5 ADs 
