vol- X 



IXiCi 



)■'•] PHOCEEDINOR OF THE NATIONAL MTTSEUM. (181 



liclow , iuid the crissuiii is so dcop a rusty line as to be almost ehestnut. 

 In I'aet, this exainph^ agrees soeh)S(*ly with speciiiiciis of 7^. satvr<tfiif< in 

 the ('oh)ratioii of tlic under parts, throuyliout, that were it uot for the 

 more ciniiamoincous foi-ehead, and tlu^ locality, it might be referred to 

 that form. Possibly it may be from the Atlantu; side of ()hiri(]ui, and 

 if so would indieate the probability that F. satnraivn follows the Co- 

 h)mbiun littoral on that coast to Cliiriqui aiul there grades into /''. 

 Iiojj'iiiaiini. 



Putting aside this one specinuMi, tiie icmainiiig fourteen exa.mi)les 

 of F. lioJJ'DKOiiii can be easily <listingiiislied from any of the til'teen 

 specinu'iis of F. s<ttiir<(fi(.s by the tblJowiiig chara<'Jeis: The ])ostociilar 

 region and sides of tlie neck art; mucli mor(; extensively and distinctly 

 cinnamonu'ous; tlie top of tin; head is lighter, more reddish brown, 

 with the forehead conspicuously rusty or <'innamomeous; the under 

 ])arts are i)aler, less uniform, and more brownisli gray; th<' ('ininiinon 

 or rufous on the sides of the lu'ck usually follows tiie i>osterioi' margin 

 of th(i black thi'oat ])at(;h, forming an inci[)ient, or oc(;asionaIly contin- 

 uous though narrow, eolhir across the fore neck, and tin; umler tail 

 eoveits are of a. decidedly lighter rutbus-tawny. 



8. Formicariiis umbrosus K'idgway. 



Formicarius hoffmanni (imr Mi/rmorniH li<t(pmarini Vau.) IJodc. I', Z. S. 1878, 62 (San 



Carlos, Costa Jli(!a). — /hmcd. t'loc. l'. S. Nat. Mus. viii, 1885, 108 ((!o8ta Kica); 



An. Mus. Nae. ('. II. 1887, 115 (Costa Kica).— Salv. and Godm. Hiol. Ccntr. 



Am., Avcs. u, |»t. :>(), 1851:^, 2'M, part (Lou S.lbaloH, Nicarajjua; Saii (Jarlos. 



JiineiK;/., and raciiaic, Costa Jlica). 

 FormicariiiH hoffmani Nutting, Proc. U. S. Nat. Miis., \'i, 1883, 105 (Los Sabalos, 



Nicarajjua). 



Hab. — Atlantic slope of ('osta Ivica and Nicaragua. 



Sp. CnAii. — Similar to F. lioffmannl (Cai}.), but colors moie intense 

 throughout, the under tail coverts dull rusty brown, with longer 

 feathers chiefly dusky ; rusty coloring on sides of neck darker and 

 more restricted, and forehead sain(; color as crown. 



Adult male (tyi)e, No. C<S24;>, Talamanca, ('osta JJica, .J. Oooi)er). — 

 rileum ri(di bister brown, with centers of the feathers blackisli, jtro- 

 ducing an indistinctly scaled appearance, these dusky centers moie <;<)n- 

 cealed on the f(u-ehead; rest of upper parts rich nnimmy brown, 

 brightening into burnt-umber or ahnost chestnut on upper tail (ioverts. 

 Lores, margin of bare orbital space, cheeks, chin, and throat black; 

 post-ocular region, terminal i)ortion of auricular region, and sides of 

 neck rusty brown or light burnt-umber. Chest, sides, aiul flanks dull 

 grayish brown (the sides washed with bister), lightening on breast and 

 belly into dull brownish gray or hair brown. Shoi'ter under tail cov- 

 erts bright russet, i\\i', hmger feathers blackisli, margined and tipped 

 with b'ght mummy brown. Bill black; ''iris chocolate;" legs and feet 

 horn brown. Total length (skin), (;.5(); wing, ;i.42; tail, 2.15; exposed 

 culnien, 0.77; tarsus, 1.35; middle toe, 0.72. 



