598 



BULLETIN 50, UNITED STATES NATIONAL MUSEU:\" 



Adult male.— length (skins), 144.78-177.80 (153.16); wing, 76.20- 

 83.31 (80.01); tail, 63.25-71.12 (67.31); culmen, from base, 19.81-22.61 

 (20.83); depth of bill at base, 15.21-17.78 (16.76); width of mandible 

 at base, 12.45-13.72 (12.95); tarsus, 20.32-22.35 (21.08); middle toe, 

 14.48-15.75 (14.99).^ 



Adidtfemale.—luengthiskim), 142.24-154.94(152.40); wing, 73.66- 

 76.96(75.95); tail, 60.20-67.31 (64.26); culmen, from base, 19.81-21.08 

 (20.57); depth of bill at base, 15.24-17.78 (16.76); width of mandible 

 at base, 12.70-13.46 (12.95); tarsus, 19.30-22.10 (21.08); middle toe, 

 13.97-15.24 (14.48).' 



Southern Honduras^ (Santa Ana) to western Ecuador* (Chimbo, 

 Esmeraldas, Balzar Mountains, etc.). 



Guiraca, sp. Sclater, Proc. Zool. Soc. Lond., 1860, 293 (Esmeraldas, w. Ecua.-or). 



Cyanoloxia cyanoides (not Coccoborus cyanoides Ijairesnaye) Lawrenxe, Ann. Lye. 

 N. Y., vii, 1861, 297 (Isthmus of Panama). 



Guiraca cyanoides Sclater, Cat. Am. Birds, 1862, 101 (Esmeraldas, \v. Ecua- 

 dor). — Sclater and Salvin, Proc. Zool. Soc. Lond., 1864, 352 (Panama R. R.) ; 



^ Sixteen specimens. 



* Five specimens. 



Specimens from different localities average as follows: 



* It is exceedingly difficult to define the northern range of this form or the south- 

 ern range of C. c. roncreta, owing to the fact that the two intergrade so gradually. 

 All specimens seen from Veragua, Costa Rica, Nicaragua, and Honduras are really 

 neither C. c. concreta nor C. c. cyanescens; most of them, however, are rather nearer to 

 the latter, especially those from more southern localities. It may be observed that 

 according to the limits which I have assigned to the southern range of C. c. concreta 

 and the northern range of C. c. cyanescens there is an overlapping in Honduras and 

 Nicaragua. This is more or less the case, for while certain Honduras specimens are 

 more like the Panama l)irds in coloration, some of those from Nicaragua and north- 

 ern Costa Rica (Rio Frio) are nearer the Mexican and Guatemalan birds in color. 



* Ecuadorean specimens are possibly distinct. I have not been able to examine 

 any in this connection. 



