FAMILY DENDROCOLAPTIDAE 37 



been recorded at numerous localities in western Bocas del Toro. 

 Specimens from the hill country near El Uracillo, Code, on the upper 

 Rio Indio, agree with the series from farther west. Skins from 

 lower down this valley near the mouth of the stream appear slightly 

 intermediate toward nanus. 



XIPHORHYNCHUS GUTTATUS MARGINATUS Griscom 



Xiphorhynchus guttatus marginatus Griscom, Amer. Mus. Nov., no. 280, Sep- 

 tember 10, 1927, p. 7 (Santa Fe, Veraguas.) 



Characters. — Darker above and below, with the wings and tail 

 more chestnut than in the races costaricensis and nanus; chin and 

 throat more cinnamon-bufif. 



Measurements. — Males (10 from Chiriqui and Veraguas), wing 

 100.5-111.5 (107.4). tail 81.0-93.0 (88.5), culmen from base 33.8- 

 38.8 (37.4, average of 9), tarsus 23.1-24.0 (23.4) mm. 



Females (10 from Chiriqui and Veraguas), wing 93.4—100.0 (97.4), 

 tail 78.8-89.0 (82.9, average of 9), culmen from base 34.1-38.4 

 (36.6), tarsus 22.2-23.5 (23.0) mm. 



Range. — Pacific slope in eastern Chiriqui and Veraguas east to 

 the forests of the western side of the Azuero Peninsula. 



A male taken May 19. 1953, near Sona, Veraguas, was in breeding 

 condition, and on May 29 I found grown juveniles at Puerto Vidal. 



XIPHORHYNCHUS GUTTATUS NANUS (Lawrence) 



Dendrornis nana Lawrence, Ibis, ser. 1, vol. 5, no. 18, April 1863, p. 181. 



(Isthmus of Panama, type locality here restricted to near Gatun, Canal Zone.) 

 Dendrornis laivrencei Ridgway, Proc. U.S. Nat. Mus., vol. 10, August 6, 1888, 



p. 509. (Panama.) 



Characters. — Throat paler bufif as in costaricensis, but lighter, 

 less olive on lower surface ; rump lighter reddish brown ; definitely 

 lighter in color than marginatus. 



A male, collected at La Jagua, Panama, January 12, 1962, had the 

 iris wood brown ; maxilla dull black ; mandible light neutral gray, 

 darker at tip and on the sides of the rami ; tarsus and toes dark 

 neutral gray ; claws darker, nearly black. 



Measurements. — Males (16 specimens), wing 100.8-109.9 (105.9), 

 tail 81.0-97.2 (87.1). culmen from base 35.9^0.5 (38.3), tarsus 

 22.5-23.8 (23.3) mm. 



Females (16 specimens) wing 93.5-100.5 (97.8), tail 73.6-86.1 

 (80.3), culmen from base 34.4-40.1 (36.2), tarsus 22.0-23.3 

 (22.7) mm. 



