FAMILY FRINGILLIDAE 



603 



and Cerro Pirre, and in San Bias at Mandinga. Von Wedel (Griscom, 

 Bull. Mus. Comp. Zool., vol. 72, 1932, p. 372) collected it in San Bias 

 at Mandinga, and in Darien it is also recorded from Cana (Griscom, 

 Bull. Mus. Comp. Zool., vol. 69, April, 1929, p. 185) and Rio Esnape 

 [sic] (Bangs and Barbour, Bull. Mus. Comp. Zool., vol. 65, 1922, p. 

 229). 



ARREMONOPS CONIROSTRIS (Bonaparte): Black-striped Sparrow, 

 Gorri6n Chen-Chen 



Arremon conirostris Bonaparte, 1815?, Consp. Avium, 1 (1850), p. 488. (Co- 

 lombia.) 



Medium size; crown gray with black stripes on side and through eye; 

 rest of upper surface yellowish green; undersurface mostly white with 

 gray band across breast. 



Description. — Length 148-178 mm. Adult (sexes alike), sides of 

 head, crown, and nape gray, with black stripes on side of crown extend- 

 ing to nape and from lores to beyond eye; rest of upper surface in- 

 cluding wing coverts and tail, yellowish green; remiges dusky, edged 

 yellowish green on primaries, slightly darker and more broadly on 

 secondaries; bend of wing yellow; undersurface white with gray band 

 across breast and gray sides becoming yellowish green on flanks and 

 undertail coverts; underwing coverts pale yellow. 



Juvenile, upper and lower surfaces olive-green, streaked with black, 

 especially on crown, upper back, and breast; abdomen more yellowish. 



The Black-striped Sparrow is very common in the lowlands of both 

 slopes of Panama, and somewhat less common in the foothills. In 

 Chiriqui, it has been found as high as 1650 m. A disjunct race occurs on 

 Isla Coiba, off the Pacific coast of Veraguas. The mainland population 

 has traditionally been divided into 2 races, striaticeps, from the Canal 

 Zone to Ecuador, and richmondi of western Panama to Honduras. In 

 the extensive series at the Smithsonian it is impossible to distinguish 

 these forms. Although there seems to be a trend for more northern 

 birds, particularly from Honduras, to be darker, there is too much in- 

 dividual variation to render any geographically meaningful division. 

 Museum age of specimens contributes to this variability as well. Mon- 

 roe (Occ. Pap. Louisiana State Univ. Mus. Zool., no. 28, 1963, pp. 

 1-12) did not recognize the supposedly darker race centratus of Hon- 

 duras, and Blake (Fieldiana: Zool., vol. 36, no. 5, 1958, p. 574) casts 

 doubt on the validity of richmondi. There is no discernable variation 

 in the striaticeps group from Honduras to Ecuador and this popula- 

 tion should be considered monotypic, apart from the subtly differenti- 



