Genus X. PETROCHELIDON. 



Type. 



Petrochelidon, Cab. Mus. Hein. i. p. 17 (1850) P. swainsoni. 



Hylcchelidon, Gould, Handb. B. Austi-. i. p. Ill (1865) P. nigricans. 



Lagenoplastes, Gould, torn. cit. p. 113 (1865) P. ariel. 



Amnochelidon, Bald. J. f. O. 1869, p. 106 P. nigricans. 



Range. North America; Central America; South America to Brazil and Peru; Antilles; South and 

 South-west Africa; Central India; Australia and the Papuan Islands. 



Clavis specierum. 



a. Frons fulvescens aut rufa. 



a. Uropygium albicans aut fumoso-albicans : guttur albicans, minute nigra 

 striolatum. 



a". Major: uropygium albicans 1. nigricans, p. 525. 



b". Minor : uropygium fumoso-albicans : gastrreum fumoso-brunneo 



adumbratum 2. timoriensis, p. 529. 



b'. Uropygium rufum : guttur rufum. 



c". Frons albicans aut fulvescens : torques nuchalis minimc obvia : 

 mentum ad basin nigrum : jugulum imum fascia cserulescenti-nigra 



ornatum : hypochondria? cinerascenti-brunnea?, 3. pyrrhonota,\).o2>\. 



d" . Frons castanea : torques nuchalis rufa obvia, regioni paroticali con- 

 juncta. 

 a'". Mentum ad basin nigrum : fascia jugularis crerulescenti-nigra : 



hypochondriae cinerascenti-brunneEe 4. swainsoni, p. 555. 



b'". Mentum minime nigrum : fascia jugularis nulla : guttur rufum : 



hypochondria rufaj 5. fulva, p. 561. 



c 1 . Uropygium rufum : guttur album : fascia pnepectoralis rufa .... 6. ruficollaris, p. 567. 



b. Frons anguste rufo transfasciata : pileum ca?rulescenti-nigrum, dorso concolor : 



uropygium rufum : gastrseum rufum : guttur et crissum castanea .... 7. rufigula, p. 571. 



c. Fascia frontalis rufa nulla : tectrices subalares et axillares pallide rufce : 



tectrices supracaudales et subcaudales nigra?., rufo apicataj 8. spilodera, p. 573. 



d. Pileum rufum. 



d'. Uropygium fumoso-brunneum, fusco marmoratum : guttur et prsepectus 



late nigro striolata 9. fluvicola, p. 577. 



e' . Uropygium albicans : guttur anguste fusco striolatum 10. arid, p. 585. 



