462 NORTH AMERICAN BIRDS. 
southern Mexico, from Isthmus of Panama to Mazatlan and British 
Honduras. 
7. albilinea Lawk. White-rumped Swallow.! 
a’. Ear-coverts partly or mainly white; feathers of lower parts abruptly grayish 
beneath the surface; upper parts in adult soft, metallic (but not burnished), 
green or greenish bronze, varied with tints of purplish, purplish bronze, 
violet, etc. (Subgenus Tachycineta.) 
Adult male: Top of head, hind-neck, back, and scapulars rich green, either 
the head and neck or dorsal region, or both, usually overlaid by a more 
or less distinct wash of bronze or purple; rump and upper tail-coverts 
rich bluish green or bluish, usually mixed with rich plum-purple; a 
white patch on each side of rump, these in life often brought close to- 
gether so as apparently to form a continuous white band; entire lower 
parts, including ear-coverts and line above posterior half (or more) of 
eye, pure white, but the feathers immediately beneath surface grayish. 
Adult female: Similar to the male, but much duller, the ear-coverts and 
hind-neck dull grayish, the former, however, more or less mixed with 
white. Young: Similar to same stage of T. bicolor, but with feathers 
of lower parts distinctly grayish beneath the surface, this showing 
through on anterior portions, especially on breast. Length 4.75-5.50, 
wing about 4.30-4.75, tail 1.95-2.20. Eggs .73 x 51. Hab. Western 
United States, east to Rocky Mountains, south, in winter, to Costa Rica. 
615. T. thalassina (Swains.). Violet-green Swallow. 
Genus CALLICHELIDON Bryant? (Page 458.) 
Species. 
Adult male: Above soft dull metallic green (not burnished), changing to more 
bluish green on wings, rump, upper tail-coverts, and tail; entire lower parts, in- 
cluding sides of head below level of eyes, pure white. Adult female: Similar to male, 
but suborbital region and ear-coverts mottled grayish. Length about 5.50-5.70, 
wing 4.30-4.50, tail 2.60-2.85, forked for .85-.95. Hab. Bahamas; accidental in 
Florida (Dry Tortugas)... [615.1.] C. cyaneoviridis Bryant. Bahaman Swallow.’ 
Genus CLIVICOLA Forstzr. (Page 458, pl. CXIV., fig. 4.) 
Species. 
Adult: Above dull grayish brown or brownish gray, darker on head and wings, 
paler on rump and upper tail-coverts; beneath white, interrupted by a broad band 
of brownish gray across chest, this continued along sides; usually, a more or Jess 
1 Petrochelidon albilinea Lawn., Ann. Lyc. N. Y. viii. 1863, 2. 
Soe. ii. 1874, 271. 
2 Callichelidon “ Bryant, MSS.” Batrp, Review Am. B.i. May, 1865, 303. Type, Hirundo cyaneoviridis 
Bryant. 
8 Hirundo cyaneoviridis Bryayt, Pr. Bost. Soc. N. H. vii. 1859, 111. 
Tachycineta albilinea Lawn., Mem. Bost. 
