C80 THE GENUS FORMIC ARIUS RIDGWAY. 



Adult )ti<tJc (Xo. r),')77!l, I'iinaiiia, J. McLoaiUKin) — l'\)roliea(l ^vil^ln 

 brown (intcrnuMliaic between IM'oiitAs brown and Vandyke brown); rest 

 ofpileum bri<^lit bister,, the centers ol" the teatliers, especially on crown, 

 blackish; rest of upper parts bright bister, Inclining to mummy brown 

 on rnmp and secondaries and passing into nearly ii bnrnt-innber hue 

 on ui)per tail coverts; tail warm bister brown, the terminal tliird (a])- 

 proximately) blackisli. Lores, orbits, <'heeks, chin, and throat black, 

 the first with a central spot of white; sides of hinder head and sides of 

 neck chestnut-cinnamon or marsl)rown, this extending narrowly across 

 the fore neck along tlie hinder edge of tlie black throat pa-t(!h; chest and 

 ux)per breast brownish gray, abiiii)tly defined against the narrow cin- 

 namomeous collar; sides and Hanks liglit oli\ c-broMn, tinged with gray- 

 ish ; lower breast and entire belly i)ale dull buff, the feathers pale gray- 

 isli beneath the surface; under tail coverts Avholly bright rnfous-tawny. 

 Bill black; legs (in dried skin) pale brown, toes darker. Lengtii (skin), 

 G.50; Aving, 3.40; tail, 2.18; exposed (;ulmen, 0.78; tarsus, 1.20; middle 

 toe, 0.70. 



Adult 'female (No. 53780, IT. S. Nat. ]\Ius., Vanama; J. McLeannan).— 

 Similar to the male, but rather brighter biown above, witliout the 

 narrow cinnaniomeons collar across fore neck (tlie grayish olive of the 

 chest directly touciiing tlie bla(;k throat patch), under jiarts more tinged 

 Avith olive, and longer under tail coverts rather darker and duller tawny- 

 rufous. Length (skin), (J.IO; wing, 3.40; tail, 2.00; exposed culmen, 

 0.75; tarsus, 1.25; middle toe, 0.70. 



Four additional adults (not sexed) from Panama belonging to the 

 American Mnsenm of Natural ITistorj^, New York City, and an adult 

 male in the collection of Messrs. Salvin and Godman agree in all essen- 

 tial i)articulars Avith the birds described aboAC; three of them show an 

 indication of the cinnaniomeons collar across the fore neck, but in none 

 is it nearly so distinct as in the specimen described. An adult from 

 Lion Hill, near Aspinwall, in the National Mnsenm collection is like- 

 wise similar. The adnlt male in Messjrs. ISahin and (jroduuin's collec- 

 tion (Panama, McLeannan) differ slightly fron) the specimens described 

 above in being a A'crv little darker beloAv, i)articularly on tin* Ixdlv, and 

 in haA'ing the cinnamonieoiis collar across the fore neck much less dis- 

 tinct, though still strongly indicated. 



Four specimens from soutliAvestern Costa Pica lent me by the au- 

 thorities of the (;Osta Pica National INInsenm are (piite like Panama 

 examides, though aA'eraging a little larger. The localities represented 

 are Trojas, near Cobagre (altitnde about .'5,000 feet), and r>nenos Aires, 

 all on the Pacific; side. 



A specimen in ]\lessrs. Salvin and (Todman's collection from Bugaba, 

 Chiritpii (E. Arce), likewise agrees closely with Panama examples, ex- 

 cept that the under ])arts are unusually dark, ])articnlarly on the chest. 

 Another specinien from Chiriipii (precise locality not stated), iii the 

 same collection, is ecpndly dark, though of a clearer slate-gray cohn- 



