508 NEW BIRDS FROM MIDDLE AMERICA. 



5. Thryothorus rufalbus castanonotus, sabsp. nov. 



Thryothorus rufalbus {nee Lakr.) Scl., P. Z. S. 1856, 140 (Chiriqui); Cata!. 



18G2, 20 (Sta. Marta and Bogota; Trinidad).— Cab., J. f. O. 18G0, 408 



(Costa Rica). — Lawr., Ann. Lye. N. Y. viii, 18G'3-'f)5, 483 (Istli. Panama), 



Vi'y (Chiriqui).— SCL. & Salv.,P. Z. S. 1864, 345 (Panama); Norn. Neotr. 



1873, 6 (part).— Fkaxtz, J. f. O. 1869, 291 (Costa Rica).— Salv., P. Z. S. 



1870, 181 (Veragua). 

 ThnjophUus rufalhus, var. rufalbus IjAIUd, Review, 1864, 128 (Istli. Panama ] 



Costa Rica). 

 Th'nophilus rufalbus Lawr., Ann. Lye. N. Y.ix, 1868, 92 (Costa Rica). — Scl. & 



Salv. Nom. Neotr. 1873, 6 (part ; Colombia ; Venezuela). — Salv. & Goi>m. 



Biol. Centr. Am., Aves, i, 1879,82 (part); Ibis, 1880,116 (Sta. Marta, 



Colombia).— SilARPE, Cat. B, Br. Mus. vi, 1881, 212 (part). 

 Troglodytes rufalbus Gray, Gen. B. 1, 1847, 158; Hand-1. i, 1869, No. 2953. 

 1 Troglodytes cumanensis Cah. J.i'.O. 1860, 408 (Cartagena, Colombia). 

 ? Thryothorus vcuezuelensis CaI'.., Mus. Hein. i, 1850, 7H (Venezuela). 

 Thryothorus longirostris {nee Vikill.) LAWit., Ann. Lye. N. Y. vii, 1861,320 



(Istb. Panama). 



SUBSP. CHAR. — Ditfering from true T. rufalbus (LA.FE.) iu purer white 

 lower parts, distiuet rusty-brown coloring of sides and Hanks, aud 

 much narrower black bars on tail. 



Habitat. — Nicaragua to Colombia. (Type, No. 81783, 9 ad., Angostura, 

 Costa Eica; Jose C. Zeledon. 



An examination of the type of Thryothorus rufalbus Lafe. (now iu 

 the museum of the Boston Society of Natural History) has shown it to 

 be of the form named by Professor Baird (Review, p. 128) ThrophUus 

 rufalbus^ var. poUoftleura. The latter name (based on specimens from 

 Guatemala) therefore becomes a synonym of T. rufalbus, the southern 

 form (considered by Professor Baird to be the true T. rufalbus) requir- 

 ing a new name, since there appears to be none that are available. The 

 type of T. rufalbus is described as from Mexico, which, if it be not from 

 Guatemala, is i^robably correct. 



6. Microcerculus daulias, sp. nov. 



Mierocerculus luscinia Zeledon, Cat. Aves do Costa Rica, 1882, 3, No. 25 ; Proc. 

 U. S. Nat. Mus. viii, 1885, 105, No. 26. 



Sp. char. — Related to M. philomela Scl., but brown of upper parts 

 much more castaneous; upper tail-coverts more heavily barred with 

 black; the lateral lower parts bright mummy-brown, distinctly barred 

 with dusky; the median lower parts pale-brown, barred and spotted 

 with dusky. 



Habitat — Costa Rica (Atlantic side). 



Adult male (type, No. G8287, Talamanca, Costa Rica; Juan Cooper): 

 Above, deep mummy-brown, inclining to chestnut-brown posteriorly; 

 the feathers margined terminally with dusky, and nmny of them with 

 one or more concealed bars of the same, those of the pileum with dis- 

 tinct central spots of dusky. Wings and tail dusky black ; middle 

 and greater wing-coverts narrowly tipped with deep black and crossed 

 by a broader subterminal bar of light brown, the feathers edged with 



