462 yORTH AMERICAy BIRDS. 



southern Mexico, from Isthmus of Panama to Mazatlan and British 



Honduras. 



T. albilinea Lawr. White-rumped Swallow.' 



a'. Ear-coverts partly or mainly white ; feathers of lower ]):irts abruptly trrayish 

 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, usualh^ 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 eai'-coverts and line above posterior half (or more) of 

 ej'e, pure white, but the feathers immediatelj- beneath surface grayish. 

 Adult female: Similar to the male, but much duller, the ear-coverts and 

 hind-neck dull graj'ish, 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. JTab. AVcstern 

 United .States, east to Rocky Mountains, south, in winter, to Costa Eica. 

 615. T. thalassina (Swains). Violet-green Swallow, 



Genus CALLICHELIDON BRr.\NT.^ (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.G0-2.85, forked for .85-.95. Hab. Bahamas; accidental in 

 Florida (Dry Tor tugas)... [Gla.l] C. cyaneoviridis Bryant. Bahaman Swallow.' 



Gencs CLIVICOLA Forster. (Page 458, pi. CXIV., fig. 4.) 



Species. 



Adult : Above dull graj'ish 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 less 



• Pctrochclidon albilinea Lawb., Ann. Lye. N. Y. viii. ISC'!, 2. Tachycineta nlhillnen IjAWn., Mem. Best. 

 Sac. ii. 1874, 271. 



' Callichelidon " BnvAXT, M.SS." IJ.VIRI), Review .\m. B. i. M:>y, ISCj, "03. Type, Hininda cyaneoviridit 

 BnvAST. 



* Hirundo cyaneoviridia Bryant, Pr. Bo^t. Soc. N. 11. vii. 1S59, HI. 



