FAMILY TI I RAUIMDAE 



431 



TANGARA LAVINIA LAVINIA (Cassin) 



Calliste Lavinia Cassin, 1858, Proc. Acad. Nat. Sci. Philadelphia, p. 178. (Isthmus 

 of Darien, New Grenada.) 



Characters. — A long thin stripe of blue extending from center of 

 throat to breast. 



Measurements. — Males (10 from Colombia), wing 62.9-71.0 (67.0), 

 tail 39.6-43.0 (41.3), oilmen from base 9.7-12.2 (11.0), tarsus 13.6- 

 17.3 (15.4), mm. 



Females (5 from Colombia), wing 64.6-66.9 (65.6), tail 36.8-41.3 

 (39.3), oilmen from base 10.3-12.2 (11.0), tarsus 13.6-16.3 (14.7) 

 mm. 



Resident. Uncommon and local in the foothills of eastern Darien, 

 and beyond Panama in northern Colombia and northwestern Ecuador. 

 I know of no specimens from Panama except the type, now lost, which 

 has only the imprecise designation "Isthmus of Darien." Collecting is 

 necessary to determine the actual range of this form in Panama. 



TANGARA DOWII (Salvin): Spangle-cheeked Tanager, 

 Tangaro Carirrayado 



Figure 34 



Small; upper surface black with pale green spots on nape and patch 

 on rump; throat black; rest of undersurface reddish to light brown. 



Description. — Length 118-129 mm. Adult (sexes alike), head, 

 throat and back to rump dull black; spots of pale green on rear crown, 

 nape, and cheek, or spots of reddish brown on crown and pale green 

 and buff on nape; rump pale green; wings and tail black w r ith all feathers 

 edged dark blue; throat spotted with this blue and/ or pale green; some 

 black spotting on breast; rest of undersurface ochraceous-buff or 

 tawny; underwing coverts buffy-white. 



This is a rare and little known species that has two very w T ell-marked, 

 disjunct populations, one in the mountains of Chiriqui, Veraguas, and 

 Bocas del Toro, the other in the highlands of eastern Darien. These 

 have in the past been treated as separate species. Slud (Bull. Amer. 

 Mus. Nat. Hist. vol. 128, 1964, pp. 353-354) has found it in Costa 

 Rica (where Ridgely believes it to be more numerous than in western 

 Panama) in forest, forest borders, and in tree-scattered clearings next 

 to forest. It travels in pairs or small groups, often with other tanagers 

 and warblers. It searches the foliage and branches from the understory 

 to medium height in trees. The only known vocalizations are thin tit or 

 tsit notes, sometimes in a twitter. 



