INSESSORES. 



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4. Tribe FISSIROSTRES. 

 1. Family HIRUNDINID^. 

 1. Genus PETROCHELIDON, Cahanis, Museum Heineanum, p. 47 (1850). 



1. Petrochelidon fulva {Vieill.). 



Eirundo fuJva, Vieill. Ois. d'Am. Sept. I, p. 62. 

 Hirundo pccciloma, GossE, B. of Jamaica, p. 04 (1847). 



Eirundo ruficoUaris, Peale, Zool. Exp. Exp. Birds, p. 175 (1st ed. 1848).* 



Vieill. Ois. d'Am. Sept. I, Plate XXXII. 



Form. — Very similar to that of P. lunifrons (Say), but smaller. Com- 

 pact and robust ; wing long, first quill longest ; secondaries short, 

 emarginate ; tail rather short, truncate or slightly forked ; legs and 

 toes slender. 



Dimensions. — Total length (of skin), about five inches; wing, four 

 inches; tail, two inches. "Extent of wings, eleven and one-tenth 

 inches" (Peale) ; "expanse eleven inches" (Gosse). 



Colors. — Adult. (Specimen from Jamaica, which is H. pcecilotna, 

 Gosse.) Forehead, ring around the back of the neck, and rump, 



* " Crown and head black, with blue reflections; wings and tail sepia-brown, even in 

 length when closed ; tail nearly square, the two middle and two outer feathers being 

 equal in length ; nuchal collar, rump, band across the breast and flanks rufous-brown ; 

 throat and abdomen white ; under tail-coverts dusky, edged with white ; bill black ; 

 feet dusky; irides brown. 



" Total length, five and one-eighth inches ; extent of wings, eleven and one-tenth 

 inches; wing from the carpal joint, four and two-tenths inches; tail, one and nine-tenths 

 of an inch ; middle and outer feathers, one and eight-tenths of an inch ; tarsi, seven- 

 twentieths of an inch; middle toe, including the claw, eleven-twentieths of an inch; 

 claw, three-twentieths of an inch ; hind toe, four-tenths of an inch ; claw, three-twentieths 

 of an inch; bill, two-tenths of an inch; to the angle of the mouth, eleven-twentieths of 

 an inch. Male." 



46 



