FAMILY FORMICARIIDAE 247 



GRALLARIA GUATIMALENSIS CHOCOENSIS Chapman 



Grallaria guatimalensis chococnsis Chapman, Bull. Amer. Mus. Nat. Hist., vol. 

 36, 1917, p. 394. (Serrania de Baudo, Choco, Colombia.) 



Characters. — Darker on upper surface, foreneck, and breast, the 

 latter streaked with cinnamon-buff; white on bases of feathers on 

 center of upper foreneck in some extended to tips of the feathers 

 to form a small white spot. 



A male taken on Cerro Mali. Darien, March 3, 1964, had the iris 

 dark wood brown; maxilla and tip of mandible black; base of 

 mandible dull dark neutral gray, with a faint greenish cast ; crus, 

 tarsus, and toes bluish neutral gray ; claws brownish neutral gray. 



Measurements. — Males (3 from Darien), wing 103.8-112.6 

 (108.8), tail 36.9-41.1 (38.1), culmen from base 26.7-28.0 (27.5), 

 tarsus 43.8-50.6 (47.6) mm. 



Resident. Found locally in the forests of Cerro Tacarcuna, its spur 

 Cerro Mali, and Cerro Pirre. 



This dark form of the species was described by Frank M. Chapman 

 from a male collected by Mrs. E. L. Kerr, July 13, 1912, on the 

 higher slopes of the Serrania de Baudo in central Choco. Griscom 

 recorded it from Darien from a male taken by Benson, March 17, 

 1928, near Cana on Cerro Pirre. 



As noted above, I secured a male near our camp at 1430 meters 

 on Cerro Mali. Another, preserved in alcohol, had been caught there 

 earlier on February 5 by C. O. Handley, Jr. March 5 I collected 

 another near the lower camp at 575 meters at the old village site on 

 the Rio Tacarcuna. The latter was found on a sloping hillside 

 heavily grown with forest. In preparing it I noted that in the dorsal 

 pterylosis the elongate rhomboid was solid in the center, with no 

 break or apterion. A narrow line of feathers extended from its lower 

 end to the base of the tail. It is in this unlike what is found in such 

 typical Formicariids as Thamnophilus. 



The stomach in the two that I have prepared was strong and 

 muscular. One was filled with fragments of medium-sized beetles, 

 the other with bits of a millipede. 



Alden H. Miller (Univ. Cal. Publ. Zool., vol. 66, 1963, p. 25) 

 described a nest of the related subspecies G. g. regulus, found in 

 late April near San Antonio, Valle. Colombia, as a "large pile of 

 soft dead sticks . . . mixed with rotting black leaves. It was sup- 

 ported on . . . branches of a fallen understory shrub" in tall forest 

 where there was a break in the canopy overhead. The main part of 



