1887.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 491 



ences iu coloration and measurements, which perhaps have no local or 

 geographical signiticance ; at any rate, the series is not sufiQcient to de- 

 cide the question. 



Mr. Salvin (P. Z. S., 1870, p. 192) makes the following observation, 

 which is in every respect supported by the N^ational Museum series: 



"A Mexican and Guntemalan species, but not yet observed in Costa 

 liica. A single example sent by Arc6 agrees fairly with Guatemalan 

 skins ; it is, however, rather darker in general tint, somewhat larger, 

 and has the bill blacker." 



2. Dendrocincla homochroa ScL. 



Dendromanes homoohrous SCL., P. Z. S., 1859, 382 (Oaxaca) ; Catal., 18G2, 162 

 (do). 

 Dendrocincla homochroa ScL. and Salv., P. Z. S., 1868, 54 (Mexico and Guat. ; 

 subgen. Dendromanes) ; Nom. Neotr. 1873, 67. 



Three specimens examined, all from Guatemala. 



3. Dendrocincla homochroa ruficepa (Sol.) 



Dendrocincla ruficeps Scl., P. Z. S., 1868, 54 (Istb. Panama). — ScL. and Salv., 

 P. Z. S., 1868, 54 (Panama ; subgen. Dendromanes) ; Nom. Neotr., 1873, 67. 



Dendromanes homoihrons "Lawr., Ann. Lye. N. Y., viii, 1862, 466 (Panama). 

 Dendrocincla homochroa Nutting, Proc. U. S. Nat. Mus., vi, 1884, 385 (Sucnyti, 

 Nicaragua). 



Three specimens exainiueil (one each from Sucuya, Nicaragua, Nava- 

 oro, Costa Ilica, and Chiriqui, Veragua). This form is so very near D. 

 homochroa that it is probably only siibsi)ecitically distinct. Ihe so- 

 called type of " Dendrocincla delatrii Bonap." {cf. Cat. Lafr. coll. No. 

 2310) is a well-preserved specimen of this form ; but the name is ap- 

 parently a noinen nudum. Picolaptes delatrii Bp. is, of course, a totally 

 different bird — a true Picolaptes. 



4. Dendrocincla tyrannina (Lafr.). 



Dendrocop^ tyranninus Lafr., Rev. Zool., 1851, 328 (Bogota) ; Mod. Dendroc, 

 1851, 81. 

 Dendrocincla ti/rannina ScL., Catal., 1862, 162 (Bogota). — Scl. and Salv., 

 P. Z. S., 1868, 54 (Colombia); Nom. Neotr., 1873, 67. 



Four specimens examined, including the two '^ types" (Nos. 2302 and 

 2303), in the Lafresnaye collection. A " Bogota" skin in the National 

 Museum collection (No. 90578) agrees closely with the Lafresnaye speci- 

 men in coloration, but is somewhat smaller, with a decidedly slen- 

 derer and blacker bill. Another from Nanegal, Eastern Ecuador (No. 

 55274), has the bill still blacker (entirely black except at base of lower 

 mandible, underneath, where it is dark brown), but iu size and form it 

 agrees more nearly with the Lafresnaye specimens, though more com- 

 pressed. The plumage is a deeper brown, however, especially on the 

 under parts, and the paler streaks on pileum fore neck, etc., are much 

 less distinct. 



