262 



SWALLOWS. 



e. Tree Swallows. Iridoprocne. 



Larger swallows, with medium forked tails ; bluish 

 above; white beneath. 



1. WHITE-BELLIED SWALLOW, I. bicolor. 6.00; 

 greenish steel-blue above; white beneath, fig. 348. Female, 



Fig. 348. 



CC, L, e, 1. 



usually duller. 

 Young, grayish- 

 brown above and in a 

 band across breast. 

 Breeds from Ya. and 

 Cal, northward into 

 British America ; win- 

 ters from S. C. 

 through the Gulf 

 States and occasional- 

 ly further north ; 



south in Sep. and Oct, ; north in April. Nests in holes of 

 trees, sometimes excavated by the birds, in bird boxes, or 

 about buildings. Flight, easy and rather graceful. Song, a 

 pleasant twitter. Abundant ; gregarious in autumn, congre- 

 gating by thousands on the sea shore. 



f. Oreen an<l Wbite Swallows. Challiclieliclon. 



Differ from e in having larger bills and longer, more 

 deeply forked tails. 



1. BAHAMA SWALLOW, C. cyaneoviridis. 6.00; 

 velvety-green above with golden iridescence ; wing coverts, 

 rump, and tail, steel-blue; white beneath. Female, duller. 

 Eesident on New Providence, Bahamas, and occurs on some 

 other of the Islands ; accidental in Fla. Song, a musical twit- 

 ter. Nests in holes of buildings. 



g. Long-tailed. Swallows. Hiruiido. 



Bill, rather small; tail, long, and forked for more than 

 one third its length. 



