138 BIRDS OF THE REPUBLIC OF PANAMA PART 3 



1952, p. 34) reported fresh eggs in the Canal Zone on July 17 and 

 August 12. 



The stomachs of two collected by E. A. Goldman near Corozal, 

 Canal Zone, June 15, 1911, were filled with finely broken bits of 

 small insects in which I identified beetles of several families — 

 weevils, flea-beetles, a bruchid, and an elaterid — ants, and a penta- 

 tomid. One held eight small seeds, the other three, that I was not 

 able to identify, probably from some berry. 



THAMNOPHILUS DOLIATUS EREMNUS Wetmore 



Thamnophilus doliatus eremnus Wetmore, Smithsonian Misc. Coll., vol. 134, 

 no. 9, July 8, 1957, p. 58. (Isla Coiba, Panama.) 



Characters. — Definitely darker in both sexes than T. d. nigri- 

 cristatus; male with black bars on the under surface broader, throat 

 heavily streaked with black, and the white bars reduced on the 

 dorsal surface ; female decidedly darker brown above and below, 

 the darker coloration especially prominent on the lower surface, 

 where it extends to the throat and the under wing coverts. 



Measurements. — Males (7 specimens), wing 69.9-72.3 (71.0), 

 tail 54.2-57.7 (56.0), culmen from base 20.3-22.7 (21.1), tarsus 26.4- 

 27.8(27.1) mm. 



Females (9 specimens), wing 66.9-71.0 (68.7), tail 52.0-58.5 

 (54.5), culmen from base 20.9-22.4 (21.5), tarsus 25.7-27.8 

 (26.6) mm. 



This, the only representative of the family on Isla Coiba, was 

 common so that as I began my work there I encountered them im- 

 mediately, in the usual pairs, in thickets back of the beaches, and in 

 tangles bordering the vegetable gardens near the buildings of the 

 convict quarters. As I became more familiar with the island I found, 

 to my surprise, that they ranged also in tangles of vines in the tree 

 crown of the tall upland forest, often so far above the ground that 

 they were beyond the range of the heaviest loads in my shotguns. 

 In fact, at times as we searched the trees high overhead for pepper 

 shrikes and other rarer game, with birds seen only in silhouette, we 

 were continually deceived by these more common ant-shrikes. 



The darker coloration of this race is suggestive of Thamnophilus 

 doliatus intermedins, found in a distant range from eastern Costa 

 Rica north through the Caribbean lowlands of Nicaragua, Honduras, 

 and Guatemala to eastern Mexico. This form however differs in the 

 male in the extensive white markings in the crown, and in average 



