FAMILY FORMICARIIDAE l6l 



As there was uncertainty regarding the record, on enquiry Dr. 

 Kenneth C. Parkes informed me that this specimen had been identi- 

 fied by him (and earHer by Mr. Todd) as Dysithamnus pimcticeps. 

 It may be noted that Ridgway (U.S. Nat. Mus. Bull. 50, vol. 5, 1911, 

 pp. 59, 60) on basis of this Carriker specimen gave "Rio Sicsola" as a 

 locality under both striaticeps and pimcticeps. On consulting Ridg- 

 way's manuscript notes I find that while he had queried the record on 

 the sheet for striaticeps, through an oversight he had failed to delete 

 it in his final manuscript. 



Slud (Amer. Mus. Nat. Hist., Bull. 128, 1964, p. 214) in Costa 

 Rica found striaticeps "common in the tropical belt, except toward 

 the end of its geographical range in the southeast." It is possible 

 that striaticeps, though not recorded, may be present also in Panama, 

 where search should be made for it in the forested hills near the Rio 

 Sixaola in the vicinity of Sibube. 



MYRMOTHERULA BRACHYURA IGNOTA Griscom: Pygmy 

 Ant-wren, Hormiguerito Pigmeo 



Figure 14 



Myrmotherula brachyura ignota Griscom, Bull. Mus. Comp. Zool., vol. 69, April 

 1929, p. 167. (Jesucito, Darien, Panama.) 



Very small ; tail so short that it may appear missing ; upper surface 

 streaked black and white ; under surface white to yellow. 



Description. — Length 65-75 mm. Tail definitely less than half as 

 long as wing; 10 rectrices. Adult male, crown and hindneck black, 

 narrowly streaked with white; back and wings black, the back 

 streaked narrowly and scapulars bordered broadly with yellowish 

 white ; middle and greater coverts broadly tipped with yellowish 

 white, to form two prominent wing bars ; outer webs of primaries 

 and secondaries edged narrowly with white ; rump light gray ; tail 

 black, tipped narrowly with white (the white often reduced or absent 

 through wear) ; side of head below and behind eye white; a broad 

 black streak behind eye, and another on malar region ; chin and 

 throat white ; rest of lower surface pale yellow ; edge of wing light 

 yellow ; under wing coverts and edgings on base of primaries white. 



Female, like male, except that in some the crown and hindneck are 

 streaked with pale bufif, with the side of the head below the eye 

 also bufif. 



A male, taken in the Chucunaque Valley at the mouth of Rio 

 Tuquesa, March 27, 1959, had the iris dark brown; maxilla black; 

 tip of mandible dark neutral gray, base neutral gray; lower half of 



