604 



BIRDS OF THE REPUBLIC OF PANAMA PART 4 



ated race viridicatus of Coiba Island. Other races are found in Co- 

 lombia, Venezuela, and northern Brazil. 



In Panama, this species inhabits shrubby clearings, woodland bor- 

 ders, and thickets where it forages on or near the ground and is usually 

 shy and difficult to see. The diet is an equal mixture of animal and 

 vegetable matter. Of several stomachs examined by E. A. Goldman, 

 a typical one contained 6 or more large finely ground ants 30%, bits of 

 3 different, finely divided beetles 10%, a larval neuropteran ( ?) 10%, 

 caterpillar remains 25%, 15 entire seeds of Paspalum sp. and other 

 fragments 5%, about 60 seeds of Miconia sp. 10%, vegetable rubbish 

 10%. Three specimens collected by Strauch (Bull. Brit. Orn. Club, 

 1977, p. 65) weighed from 37.6 to 39.5 g. 



The Black-striped Sparrow usually delivers its loud and distinctive 

 song from a low or inconspicuous perch. It sings throughout the year, 

 but most during the long nesting season. Skutch (Pac. Coast Avif. 

 no. 31, 1954, p. 104) has heard it singing during the night and at all 

 hours of the day, but most profusely at dawn. Eisenmann (Smiths. 

 Misc. Coll., vol. 117, no. 5, 1952, pp. 58-59) describes the song and 

 other vocalizations as including "a loud, clear note, repeated at first 

 slowly then gradually faster and faster, cho, cho, cho, cho cho cho cho- 

 cho-chochocho. Calls, whit-cho; also a whistled whit or white (like the 

 white in the bob-white call) ; also whup; also cheeoo, cheeoo; also chep- 

 chep-chep." Moynihan (Auk, 1963, pp. 116-144) describes in detail 

 the associated hostile and sexual displays. 



ARREMONOPS CONIROSTRIS STRIATICEPS (Lafresnaye) 



Embernagra striaticeps Lafresnaye, 1853, Rev. Mag. Zool. [Paris], ser. 2, 5, p. 61. 

 (Panama.) 



Arremonops richmondi Ridgway, 1898, Auk, 15, p. 228. (Greytown, Nicaragua.) 



Characters. — Black stripes on crown narrow; gray of undersurface 

 pale, less extensive on breast and sides; green of upper surface lighter, 

 more yellowish. 



A female collected February 23, 1962, at El Cope, Code, had the iris 

 light brownish red; maxilla, base of cutting edge and tip of mandible 

 black; rest of maxilla pale neutral gray, with a hint of buff at base of 

 gonys; tarsus and toes light brown; claws faintly darker. Others of 

 both sexes I have collected were similar, although lacking the buff at 

 base of gonys. 



Measurements. — Males (10 from Panama), wing 75.4-82.0 (79.1), 

 tail 67.5-75.2 (71.4), oilmen from base 17.2-18.9 (18.1), tarsus 27.1- 

 29.6 (28.4) mm. 



