52 



AVIFAUNA COLUMBIANA. 



abundant. The genus and family are essentially tropical, Pyranga 

 being the only North American form, and the present species being 

 more restricted in its range than P. rubra. It does not arrive until 

 May, and leaves about the third week in September. Its resorts are 

 high, open woods, especially those containing much undergrowth. The 

 nest is a shallow, flat structure, saddled upon a horizontal bough ; the 

 eggs are spotted. [155] 



Family HIBUNDINID.E : Swallows. 



63. (88.) Hirundo erythrogastra horreorum (Bart.) Coues. Barn Swallow. 



An abundant summer resident ; rather less so than formerly, there 

 being more houses and fewer barns in the immediate vicinity of the city. 



Fig. 23— Details of form of Barn Swallow. 



Arrives March 25 (on an average) and remains until September 12, or a 

 little later, varying different seasons with the weather. [159] 



64. (90.) Iridoprocne bicolor (Yielll.) Coues. White-bellied Swallow. 



A common summer resident, but less abundant than the Barn Swal- 

 low. Arrives the first week in April and remains until September 12, 

 or thereabouts, according to the weather. [160] 



65. (89.) Petrochelidon lunifrons (Say.) Cab. Cliff or Eaves Swallow. 



A summer resident, but not nearly so abundant as the Barn Swallow, 

 owing to lack of suitable breeding places. Arrives last week in April 

 and remains until September 12, or thereabouts. [1G2J 



66. (91.) Cotile riparia (Linn.) Boie. Bank Swallow. 



A summer resident ; very abundant. It is the most numerous of the 

 Swallows, particularly in the fall, just before its departure, when flocks 



