690 



BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



tail, 55.5-01 (57.9); exposed culiuen, 11-13 (11.8); tarsu.s, 20-2P> (22.3); 

 middle toe, 13-16 (14.4).' 



Ad<tlt y'r;//r/A'.— Length (skins), 122-130 (125.4); wing-, 51.5-55 

 (53.(;); tail, 54-61 (55.8); exposed eulmen, 11-12 (11.3); tarsus, 21-23 

 (22); middle toe, 13-16 (14.3).- 



Haviiif,' hut a single Guatemalan specimen (the tyiie of (uvlhh/pis jxiUnci iihida, 

 var. canmncha) for comparison with the Central American series. I for the present 

 unite all under one name. The single (xuatemalaii specimen has the gray of tiie 

 pileum extended over the hindneck, which apparently is not the case with any of 

 the specimens from farther southward, and it has the wing and tail longer; but a 

 series from Guatemala might show that these differences are not constant. 



Central xVmeriea, from Guatemala (Rctalhuleu) to Chiriqiu (Volcan 

 de Chiriqui; Boqucte). 



(n'(>l}ilii))is ,r<iui)wctlalis (not Mvtac'dht :tijiii)tur(ialis Gmelin) Salvin and Sclatek, 

 Ibis, 1860, 273 (Dueiias, Guatemala). 



(iiothli/pis poUofcphala, part, Bairu, Review Am. Birds, lS(i5, 225 (Retalhuleu, 

 Guatemala). 



Geothbipis poVtoa'phila (not of Baird) Salvin, Ibis, 1870, 114 (Costa Rica). — 

 Sharpe, Cat. Birds Brit. Mus., x, 1885, 359, part, pi. 9, tig. 4 (British Hon- 

 duras; Retalhuleu, San Geronimo, and Duenas, (Juatemala). 



Geothlyp'tK poVioceplKda, var. c(iiiiinirli« RimavAV, Am. Journ. Sci., iv, Dec, 1872, 

 459; in Baird, Brewer, and Ridgway's Hist. N. Am. Birds, i, 1874, 296. 



[(leothhiph pollocephaht'] fi. eanimivha Ridgwav, Am. Journ. Sci., iv., Dec, 1872, 

 459 (Retalhuleu, Guatemala; coll. U. S. Nat. Mus.). 



Gcolldiiph puliocepliala . . . var. caninucha Boucard, Proc'. Zool. Sot'. I^ond., 

 1878, 52 (San Jose, Costa Rica). 



Gajlldi/pis caninnrha Salvin and Godman, Eiol. Centr.-Am., Aves, i, 1881, 153, 

 part, pi. 9, tig. 2 (Patio Bolas, etc., Guatemala; Costa Rica). — Zeledon, 

 Proc. V. S. Nat. Mus., viii, 1885, 105 (Costa Rica); Anal. Mus. Nac Costa 

 Rica, i, 1887, 107 (Los Anonas, Costa Rica) .—Underwood, Ibis, 1896,434 

 (Volcan de ]\Iiravalles, Costa Rica). 



[Geotfdyjm poUort'phald] p. G. r(iniiiuchii Sharpe, Cat. Birds Brit. Mus., x, 1885, 

 360, in list of specimens, part (Costa Rica). 



' Fifteen specimens. 



■^ Eight specimens. 



Specimens from different localities average, respectively, as follows: 



