518 



lilUDS OF THE GALAI'jaOS ARCHIPELAGO— BIDGWAT. vol.xix. 



abdomiual feathers and uuder tail-coverts buflfy whitish; bill light 

 brown, with basal half of maxilla duskj'. Length (skin), 5; wing, 2.00; 

 tail, 1.7."); cnlincn, 0.78; gonys, 0.45; width of mandible at base. 0,45; 

 dei)th of bill at base, 0.G2; tarsus, 0.00; middle toe, 0.70. 



Adult female .**.— No. 149828, U.S.N. INI. ; same locality, etc. Similar to 

 the supposed immature male, as described above, but under parts much 

 more broadly aud extensively stieaked with whitish, only the chin and 

 throat being uniform dusky. Length (skin), 4.90; wing, 2.95; tail, 

 1.75; culmeu, 0.78; gonys, 0.42; width of mandible atbase, 0.43; depth 

 of bill atbase, 0.00; tarsus, 0.92; middle toe, 0.70. 

 From the subjoined measurements, it will be seen, if they are com- 

 pared with those of G. conirostris. on page 

 517, that G. media and G. conirostris inoscu- 

 late with respect to all measurements ex- 

 cept length of culmen, which is constantly 

 less in the i)resent form; but it should be 

 stated that all the specimens of G. coniros- 

 tris which closely approach G. media in 

 measurements are either females or imma- 

 ture birds. It is possible that the two sup- 

 posed forms really represent extremes of one variable local race; but 

 should this prove to be the case, the difference between the extremes 

 (as, for example, the types of the two, both adult males in perfect black 

 plumage) is certainly remarkable. 



Measurements of Geospiza media. 



Fig. 4. //<Y((/ (tf drogpiza mrdiri. 



GEOSPIZA BAURI, Ridgway. 

 (Plate LVIl, lig. 12.) 



Geospiza bauri. RinCxW.vv, Proe. II. S. Nat. Mas., XVII, Xo. 1007, Nov. 15, 1894, 

 I). 3(52 (James Isliiud, Galapagos Archipelago; collection of Dr. G. Baur). 



Specific characters. — Similar to G. media, Ridgway, of Hood Island, 

 but slightly larger, M'itli bill much higher at base. Wing, 3.20; tail, 2; 

 culmen, 0.80; depth of bill at base, 0.08; tarsus, 0.93. 



Ram/e. — Galapagos Archipelago: James Island (Baur and Adams). 

 (Tyi)e, No. 502, adult male, collection J)r. G. Banr, James Island, 

 August 7, 1891.) 



