THE BAR-TAILED GODWIT. 421 
and birds coming thence due south would hit the coast first 
about Bankok, and next about the middle of the Malay 
Peninsula, while birds breeding further west (up to the goth 
degree East Longitude} in that great Northern Siberian Pro- 
montory, would similarly reach the Eastern Coasts of the Bay 
of Bengal. There are no grounds, however, for concluding that 
these birds do migrate due north and south, and we know 
nothing, moreover, of the effect of the lagging of the atmosphere 
in the diurnal revolution of the earth on the course of birds 
thus migrating, so that, while it is quite possible that this species 
will prove to occur on the Arakan, Pegu, and Tenasserim Coasts, 
it is impossible to predicate that they will. On the coasts 
of Siam, Cambodia, Cochin China, and Tonquin, we may be 
quite sure that they do occur. 
BESIDES THE four species or races of Godwits noticed above, 
vig., the Black-tailed and Eastern Black-tailed, both of which at 
all seasons have the axillaries pure white, and the Bar-tailed 
and Eastern Bar-tailed, both of which at all seasons have the 
axillaries, white, barred or spotted or marked with brown 
(varying from greyish to blackish) America has two other 
species—the American Black-tailed (ZL. hudsonica, Latham) 
distinguished by its: black axillaries, and the Great Marbled 
_ Godwit, (Z. fedoa, Linné), which equally, at all seasons, has 
rufous axillaries, barred or marked with black. 
