FAMILY TROGLODYTIDAE 



121 



Sclater, "who decided that it was undescribed, and complimented me by 

 conferring my name upon it." 



A common call is a harsh, guttural cutta, cutta, cutta. This vocaliza- 

 tion is often intermixed with clear, sweet whistles in its song, which D. 

 Harrower syllabized as " per cutta wheet, per-cutta whoot, per-cutta 

 wheet, per-cutta woot; per-cutta-cuttle wheet whoot; per-cutta whoot 

 whoot" (Eisenmann, Smiths. Misc. Coll. 117, no. 5, 1952, p. 47). An- 

 other version heard on Barro Colorado Island is ong cutta cutta, whong 

 cutta glut, WHOO HEE, etc. (Willis and Eisenmann, Smiths. Cont. 

 Zool. no. 291, 1979, p. 25). Still another common vocalization is a 

 sweet, rhythmic, slow, whistled, repeated tock, tee, sometimes preceded 

 or followed by the nonmusical cutta notes (Eisenmann). F. O. Cha- 

 pelle {in litt. to Eisenmann) reported a three-note song without any 

 cuttas, "which exactly matches the 'do' and 'fa' of Guido's scale"; three 

 variations were Do-do-fa; fa-do-Do; and do-Do-do, the capitalized Do 

 being an octave higher than the uncapitalized. 



During admittedly short stays in northern Venezuela where Eisen- 

 mann saw or heard (vocalizations identified by P. Schwartz) popula- 

 tions belonging to the true C. aradus group, he never heard either the 

 cutta or the tock, tee vocalizations so characteristic in Panama. 



Morton (in Temple, Endangered Birds, Univ. of Wisconsin Press, 

 1977, pp. 379-384) has reintroduced 7 birds of this species to Barro 

 Colorado, where it had disappeared between 1960 and 1970. Two of 

 these pairs nested successfully within 5 months of their release. 



MICROCERCULUS MARGINATUS LUSCINIA (Salvin): Whistler Wren, 

 Cucarachero Ruisenor 



Microcerculus luscinia Salvin, Proc. Zool. Soc. London, 1866, p. 69. (Santa Fe, 

 Veragua.) 



Microcerculus acentetus Bangs, Proc. New England Zool. Club, vol. 3, Jan. 30, 

 1902, p. 56 (1524 m, Boquete, Chiriqui.) 



Small, wrenlike in body form, but with long bill and long legs, and 

 unusually short tail on which the tip barely projects beyond the wings. 



Description. — Length 98-110 mm. Upper surface plain deep brown, 

 somewhat duller on the crown and hindneck where the feathers are 

 edged very narrowly with dusky; wings and tail dull blackish brown, 

 the coverts edged narrowly with deep brown, with a small spot of dull 

 buff on the tip; side of head brownish gray, becoming grayish white on 

 chin and upper throat; upper sides and breast brownish gray; feathers 

 of lower breast and abdomen paler brownish gray, with centrally black- 

 ish, more or less V-shaped markings, and edged rather widely with dull 



