178 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



SCAPANEUS GUATEMALENSIS NELSONI Ridgway. 



ITELSON'S IVOKY-BILL. 



Similar to 8. g. guatemdlensis but black of upper parts, neck, and 

 chest less sooty (that of foreneck glossy, slightly bluish), that of chest 

 more extended; back-stripes whiter (less yellowish); Ughter bars on 

 under parts of body paler and narrower; yellow on under side of 

 wings paler; and average measurements decidedly smaller. 



Adult maZe.— Length (skins), 290-330 (304); wing, 165.5-187 

 (176.6); tail, 95-105.5 (98); culmen, 43-50 (45.1); tarsus, 31-33.5 

 (32.3); outer anterior toe, 19.5-25 (23.6)." 



Adult female.— Length, (skins), 281-350 (307); wing, 174-189 

 (180.7); tail, 94.5-113 (103.8); culmen, 40.5-49 (44); tarsus, 30-33.5 

 (31.9); outer anterior toe, 20-24 (22.3).« 



Southwestern Mexico, in States of Sinaloa (MazatMn; Presidio de 

 Mazatlan; Escuinapa; Brazil; Mt. Juan Lisiarraga, S,500 ft.; Las 

 Cabras I.), Jalisco (Torula; Bahia de Banderas), Colima (Rio de la 

 Armeria; Manzamllo; Santiago; Cualata; Jacolapa), Michoacdn (La 

 Salada; Volcan de JoruUa), and Guerrero (Acapulco; Dos Arroyos; 

 El Zopilote; El Einc6n; Tecpfin; Papayo; La Saluda; Onulteme), 

 and Territory of Tepic (San Bias; Tepic). 



CampepMlus gvatemalends (not Picus guatemalensis Hartlaub) Lawrence, Mem. 



Boat. Soc. N. H., ii, 1874, 293 (Mazatlan, Sinaloa; Eio de la Armeria, 



Colima). 

 Campophilus guatemalengis Hargitt, Cat. Birds Brit. Mus., xvi, 1890, 473, part 



(Mazatlan and Presidio near Mazatlan, Sinaloa; Tepic; Tonila, Jalisco; 



Santiago, Cualata, and Jacolapa, Colima). — Salvin and Godman, Biol. 



Centr.-Am., Aves, ii, 1895, 446, part (localities in Sinaloa, Tepic, Jalisco, 



and Colima; Dos Arroyos, Guerrero). 

 C[am,pepMlus] guatemalensis Ridgwat, Man. N. Am. Birds, 1887, 281, part. 

 Campephilvs guatemalensis guatemalensis Miher (W. De W.), BiiU. Am. Mus. 



N. H., xxi, Nov. 24, 1905, 352 (Escuinapa, Brazil, Las Cabras Islands, and 



Mt. Juan Lisiarraga, s. Sinaloa). 

 Scapaneus guatemalensis nelsoni Ridgwat, Proc. Biol. Soc. Wash., xxiv, Feb. 24, 



1911, 84 (EI Rinc6n, Guerrero; coll. U. S. Nat Mus.). 



SCAPANEUS GUATEMALENSIS REGIUS (Reichenbach). 

 TSRA CRUZ IVOBY-BILL. 



Similar to 8. g. nelsoni but much larger (even than 8. g. guatemor 

 lensis), and black of foreneck, chest, etc., rather less intense. 



Adult male. — Length (skins), 325-367 (353); wiag, 183.5-205 

 (194.6); tail, 93.5-117.5 (106.6); culmen, 48-56.5 (51.8); tarsus, 

 33.5-38 (36); outer anterior toe, 25-30 (26.7)." 



Adult female. — Length (sMns), 318-384 (348); wing, 187-209 

 (197.4); tail, 105-123.5 (113.9); culmen, 43-53 (49); tarsus, 34.6-37 

 (35.4); outer anterior toe, 23.5-27 (25.6).* 



o Ten specimens. b Nine specimens. 



