[2 
7. 
18. 
IQ. 
20. 
21. 
22. 
23 
28. 
29. 
. No white superciliary streak 
PASSERES 
Black at base of lateral vectrices less extended, usually concealed by 
under tail coverts. Tail shorter: g1-gS mm... . 
Black at base of lateral vectrices more extended, showing beyond longest 
under tail coverts. Tail longer : 51-56 mm. ne he 
Grey of upper parts paler and more bluish 
Grey of upper parts darker, more slaty . . 
Smaller : wing about 45 mm. Under parts entirely pure white, or with 
sides but faintly tinged with very pale bluish grey. 
Larger : wing about 48 mm. Under parts strongly shaded with bliash 
grey on chestand sides . . . A ges 
Greater upper wing coverts very distinctly margined with pure white ; 
white edges of innermost secondaries (tertials) extremely broad, 
occupying nearly the entire width of the outer web . . . . 
Greater upper wing coverts edged with the colour of the back, dark 
bluish or slate grey ; white edges of innermost secondaries (tertials) 
much narrower, occupying only from one-fourth to one-third of the 
width of the outer web 
Outermost vectvix entirely white, sometimes with traces of black at the 
extreme base of inner web of, Ral ou pe ener 
Outermost vectrix with basal third or half of inner web black 
With considerably move than basal half of inner web of outermost 
vectrix black od Bons eas a an er 
With much less than basal half of inner web of outermost vectrix black. 
Black at base of outermost rvectrix move restricted, entirely concealed 
by under tail coverts. Bill weaker and shorter : rr mm, 
Black at base of outermost vectrix more extended, showing beyond 
longest under tail coverts. Bill stronger and longer : 12-13 mm. 
. Grey of back etc. paler, more bluish. Tail shorter : 47-52 mm. 
Grey of back etc. darker, more slaty. Tail longer : 54-57 mm. 
Upper portion of eay coverts slate blackish or black, producing a 
conspicuous dusky postoculay patch . 
Upper portion of ear coverts pale grey or greyish white. 
With a distinct white superciliary streak. 
. Ear coverts with at least upper half pale grey, not conspicuously 
different from darker grey pileum, and shading into paler grey on 
lower portion . hues amie 
Ear coverts white, or greyish white, abyuptly contrasted with a dusky 
postocular streak, ahove which is a narrow whitish line. ; 
Tail longer : averaging 48 mm. 
Tail shorter : avevaging 43 mm. 
Outermost primary much less than half as long as second . 
Outermost primary much larger, at least half as long as second . 
1) Female of P. bilineata andina unknown. 
2) Female of P. nigriceps albiventyis unknown to the author. 
13. P. BILINEATA BILINEATA of ad. 
14. P. BILINEATA ANDINA Of ad. 
19. 
20. 
17. P. NIGRICEPS ALBIVENTRIS of ad. 
18. P. NIGRICEPS NIGRICEPS of ad. 
1g. P. Livipa Livipa of ad. 
20. P. LIVIDA INNOTATA & ad. 
22. 
21. P. LIvips LEUCOGASTRA of ad. 
seco Se one eee BSE 
23. P. LIVIDA PARVIROSTRIS O ad. 
ph se hs, och Sete) eee a eee 
22. P. LiVIDA PLUMBICEPS of ad. 
24. P. LIVIDA Mator Cf ad. 
st be fog Bd acm eligtl 2i7 
13. P. BILINEATA BILINEATA Q 1). 
: 29. 
Aiea se a es Sh 
15. P. ALBILORIS ALBILORIS Q. 
16, P. ALBILORIS BAIRDI Q. 
A ERE Bee ype ee 30. 
18. P. NIGRICEPS NIGRICEPS Q 2). 
