SYLVIAD^. SAXICOWNJB. PHILOMELIN^. 2S9 
Thamnobia, Sw. Bill small, slender ; base widened ; 
the sides much compressed : culmen slightly arched 
from the base, hut the tip of the upper mandible is 
reflected and entire : gape smooth. Wings short, 
much rounded ; the primaries hardly exceeding the 
secondaries and tertials, which are very broad. Tail 
moderate, broad, and much rounded. Tarsus much 
longer than the middle and hinder toes. Lateral toes 
very unequal, the inner shortest. Claws slightly 
curved. 
T. leucoptera. O. d’Af. pi. 188.f. I. atrata. Part 5. No. 36. 
Saxicola, Bechstein. Bill broad at the base, com- 
pressed on the sides ; the tip inflected, and distinctly 
notched. Wings moderate ; the first quiU spurious ; 
the second slightly shorter than the three next, 
which are equal, and loqgest. Tail short, even, or 
rounded. Tarsi long. Lateral toes unequal. The Old 
World. 
S. leucoptera, Part 5. No. 37. rufiventer. Part 5. No. 38. 
rubccola. Selby, pi. 48. f. 3, 4. 
Erythaca, Robins. General structure of Saxicola, but 
the tail more lengthened, the feathers narrowed at 
their tips, and sometimes mucronate. Rictus with 
the bristles few, and very weak. 
Erythaca, Sw. Wings rounded; the three exterior 
quills graduated ; the first half as long as the second ; 
the third slightly shorter than the fourth and fifth, 
which are equal, and longest. Bill much compressed. 
Lateral toes nearly equal. 
E. rubccola. Selby, pi. 46. f. 2. 
Sialia, Sw. Bill wider at the base. Wings long ; the 
first quill spurious ; the second slightly shorter than 
the two next, which ar^equ.tl and longest. Tarsus 
moderate, not longer tian the middle toe. Lateral 
toes equal. ^ 
S Wilsoiiii. Wils. pi. 3. f. .3. > Mexicaua. N. Z. p. 202. 
arctica. N. Z. pi. 39. , 
Petboica, Sw. Tip of the bill abruptly deflexed or 
