132 
KEY TO FAMILIES 
fourth or fifth primary longest, first 
very short, not more than one-third as 
long; tail rather long, dull, ashy gray 
without white blotches, p. 485. 
Family 19. Sylviidce. — Kinglets and 
Gnatcatchers (Fig. 75). 
Length 3 ’50-5 ‘00; bill slender, resem- 
bling that of some Warblers, but the 
first primary is very short, only about 
one-third as long as the longest, p. 488. 
Family 20. Turdidce . — • 
Thrushes, Bluebirds, 
etc. (Fig. 76). 
Length over 5 ‘50; bill mod- 
erate, the tip of the upper 
mandible notched ; tarsus 
smooth, the scales, if any, 
fused and indistinct; tail 
square; wings long and 
pointed, 3 ‘75 or over, third 
primary the longest, the first 
very short, less than one inch 
in length, p. 491. 
Fig. 76, 
