Todd-Carriker : Birds of Santa Marta Region, Colombia. 303 



the new form they are more olivaceous (medal bronze). The under 

 parts in virescens are paler and grayer, less brownish; the upper and 

 under tail-coverts are also slightly paler ; the hindneck and sides of the 

 neck are more distinctly cinnamoneous ; and the tail is duller, less 

 rufescent, with the dark apical portion averaging more restricted 

 than in the Trinidad form, as represented by a series of thirteen speci- 

 mens. It was at first thought that the tail was longer also, but com- 

 parison of a larger series has dispelled this idea. The type is in 

 rather worn plumage, but specimens in fresh dress support the char- 

 .acters assigned to the form, despite the usual range of variation. 



This ant-thrush was found only in the alluvial plain of the Tropical 

 Zone at Fundacion and Tucurinca, this being the first time that any 

 member of the genus Formicarius has been reported from the Santa 

 Marta region. Very likely it occurs throughout the lower Magdalena 

 basin, wherever there is heavy forest. It keeps to the dark, damp 

 parts of the forest, being rarely seen off the ground, is very shy, and 

 very seldom takes flight. It has the same characteristic call-note as 

 the other members of the genus, and is readily " whistled up " after a 

 little practice. The female seldom answers to the call, however, and 

 for this reason is not often taken. 



256. Myrmeciza longipes panamensis Ridgway. 



Myrmeciza boucardi (not of von Berlepsch) Bangs, Proc. Biol. Soc. Wash- 

 ington, XII, 1S98, 138 ("Santa Marta")- — Allen, Bull. Am. Mus. Nat. 

 Hist., XIII, 1900, 160 (Bonda and Cacagualito) . 



Myrmeciza boucardi panamensis Ridgway, Bull. U. S. Nat. Mus., No. 50, V, 

 ■1911, 107 (Santa Marta localities and references; meas.). 



Twenty- four specimens: Bonda, Buritaca, , Don Diego, Fundacion 

 T ucurinca, and Valencia. 



The choice of the specific name in this case depends on whether the 

 unidentifiable Myrmothera longipes Vieillot is or is not congeneric 

 with the later DrymopMla longipes Swainson. Not being in a position 

 at present to express any opinion on this question we follow Mr. Hell- 

 mayr. 



The acquisition of a series of M. longipes longipes from Venezuela 

 shows that the Santa Marta birds belong to a different form, in which 

 the males have the chest and sides more strongly washed with gray. 

 Females of the two forms, however, are much alike. The series in- 

 cludes several male specimens in transition dress, dated .August .17 

 and 18, September 18, and November 19. 



