896 Annals of the Carnegie Museum. 



cubated, and three on the 16th, two containing one egg and the third 

 two eggs, all partially incubated. One egg seems to be the usual clutch, 

 but one nest out of four having two eggs, while of the set of two, but one 

 was marked, showing that the pigment was exhausted on the first egg 

 laid. The nest is bulky, loosely built, and constructed of weed-stalks 

 and bamboo leaves, lined with soft blades of grass and placed in a thick 

 bush or on a bamboo spray not far above the ground. The eggs vary 

 from dull white, with a faint tinge of blue, to pale bluish, sparsely speckled 

 and dotted over the whole surface with a few markings of lilac and heavier 

 blotches of burnt umber or sooty, thicker at the larger end, and sometimes 

 entirely wanting at the smaller. Average measurements : 29 X 19.4 mm. 



732. Pselliophorus tibialis (Lawrence). 



Tachyphonus tibialis Lawrence, Ann. Lye. N. Y., VIII, June, 1864, 71 (San 

 Jose; U. S. Nat. Mus.); IX, 1868, 101 (San Jose and Dota [J. Carmiol], 

 Irazu [Cooper], Rancho Redondo [F. Carmiol], and Quebrada Honda [Frant- 

 zius]).— Frantzius, Jour, ftir Orn., 1869, 299 (Dota Mts., Irazu, La Palma 

 de Irazu, Rancho Redondo, and Quebrada Honda). 



Buarremon tibialis Boucard, Proc. Zool. Soc. Lond., 1878, 56 (Navarro and 

 Volcan de Irazu).— Zeledon, Cat. Aves de C. R., 1882, 8; An. Mus. Nac. de 

 C. R., I, 1887, no (La Palma, Volcan de Irazu).— Sal vin and Godman, 

 Biol. Centr.-Am., I, 1884, 322 (San Jose, Dota, Parita [Carmiol], Rancho 

 Redondo [Frantzius and Carmiol], La Palma, and Quebrada Honda [Frant- 

 zius], Volcan de Irazu [Arce, Rogers, and Cooper], Navarro [Boucard]). — 

 Sclater, Cat. Birds Brit. Mus., XI, 1886, 262 (Irazu [Rogers and Arce], 

 Parita and Rancho Redondo [Carmiol]). — Alfaro, Gac. Oficial de C. R., 

 No. 288, Dec, 1888 (Volcan de Poas). 



Pselliophorus tibialis Ridgway, Birds of North and Mid. Am., I, 1901, 469 

 (highlands of Costa Rica and Chiriqui). 



U. S. Nat. Museum: Volcan de Turrialba, Coliblanco (Ridgway and 

 Zeledon), El Copey, Las Vueltas, and La Lagunaria de Dota (Basulto), 

 Achiote de Poas, Estrella de Cartago, and Azahar de Cartago (Alfaro), 

 Burgos de Irazu (Castro). 



Bangs Collection: Volcan de Irazu, Azahar de Cartago, and Escazii 

 (Underwood). 



C. H. Lankester Collection: Volcan de Turrialba. 



Carnegie Museum: La Hondura, Volcan de Irazu (Carriker). Twenty- 

 six skins. 

 "Some specimens, which are doubtless young, have the feathers on the 



tibiae more or less dark. There is also much individual variation as regards 



the presence and intensity of the olivaceous tinge on the breast. Further- 



