FAMILY HIRUNDINIDAE 



I I 



on the Atlantic slope; to Boca de Cupe, above El Real on the Rio Tuira, 

 and above the mouth of the Rio Tuquesa, on the Rio Chucunaque, on 

 the Pacific side. In July 1975, Ridgely (in litt. ) found this species quite 

 common along the lower Chucunaque ( Yaviza area) and Tuira Rivers, 

 but it became relatively scarcer as he proceeded up the latter toward 

 Cerro Quia on the Colombian border. At the base of Cerro Quia, he 

 found only one pair, below the outlet of the Rio Mono. 



A series of specimens throughout the range from Mexico to Panama 

 shows no geographic variation. A form T. a. rhizophorae described by 

 van Rossem (Proc. Biol. Soc. Washington, vol. 32, 1939, p. 155) on 

 the basis of supposed greater amount of white in the frontal and loral 

 area, from Tobari Bay, southern Sonora, ranging to Nayarit, proves 

 invalid from the series now available. 



Hellmayr (Cat. Birds Amer., vol. 9, 1935, p. 70) has listed another 

 swallow, Tachycineta stolzmanni Philippi, known only from Chepen 

 on the coast of northern Peru, also as a race of albilinea, but this re- 

 quires verification. In brief, this Peruvian bird originally was described 

 as Hirundo leucopygia by Taczanowski (Proc. Zool. Soc. London, 

 1880, p. 192) from 4 specimens collected by Stolzmann. As this name 

 was preoccupied by an earlier H. leucopygia of 1834, Philippi (Ann. 

 Mus. Nac. Chile, Zool., vol. 15, 1902, p. 23) renamed it Hirundo stolz- 

 manni. The type, in the Warsaw Museum, is lost. Hellmayr, who 

 examined one of the original specimens in the Senckenberg Museum in 

 Frankfurt, noted that, compared to Hirundo albilinea of Central Amer- 

 ica, it differed in much smaller bill, lack of white line above the lores, 

 grayish instead of white bases on the dorsal feathers, gray instead of 

 white underwing coverts, and grayish instead of white undersurface, 

 with other minor differences. In spite of the extensive gap in the range, 

 he listed the Peruvian population as a race of albilinea. In this he was 

 followed by Peters (Check-list Birds World, vol. 9, 1960, p. 82). Hell- 

 mayr's action was accepted also by Zimmer (Amer. Mus. Nov., no. 

 1723, 1955, p. 33). Since, in spite of modern studies in the area con- 

 cerned, there is no other report of T. albilinea in northwestern South 

 America, the relationship suggested appears doubtful. T. albilinea, 

 therefore, is listed as without accepted races. 



TACHYCINETA THALASSINA LEPIDA Mearns: Violet-green 

 Swallow, Golondrina Verde 



Tachycineta lepida Mearns, Proc. Biol. Soc. Washington, vol. 15, March 5, 1902, 

 p. 31. (Campbell's Ranch, Laguna Mountains, Coast Range, 20 miles north of 

 Campo, San Diego County, California.) 



