248 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 
Xiphorhynchus flavigaster mentalis OBERHOLSER, Smithsonian Misc. Coll., xlviii, 
no. 1579, May 13, 1905, 63. 
[Dendrocolaptes] mentalis Gray, Hand-list, i, 1869, 177, no. 2413. 
Dendrornis flavigaster (not Xiphorhynchus flavigaster Swainson) Exttot, Auk, vii, 
1890, 178, part (Mazatl4n; Manzanillo; monogr.). 
Dendrornis eburneirostris (not Dryocopus eburneirostris ‘‘Lesson’”’) Satvin and 
Gopman, Biol. Centr.-Am., Aves, ii, 1891, 178, part (Mazatlin; Tepic; San- 
tiago de Tepic; Santiago de Colima; Tecolapa). 
[Dendrornis] eburnetrostris ScLaTteR and Satvin, Nom. Av. Neotr., 1873, 68, 
part.—Suarpe, Hand-list, iii, 1901, 78, part. 
XIPHORHYNCHUS FLAVIGASTER MEGARHYNCHUS (Nelson). 
LARGE-BILLED WOODHEWER. 
Similar in coloration to X. f. mentalis but larger, especially the bill. 
Adult male.—Length (skins), 239-265 (249); wing, 114-123 (117.4); 
tail, 89.5-96 (92.3); culmen, 42-45.5 (43.2); tarsus, 23-25 (23.8); 
middle toe, 18.5-19 (18.8).¢ 
Adult female—Length (skins), 232-253 (242); wing, 110-111 
(110.5); tail, 88-90 (89); culmen, 42-42.5 (42.2); tarsus, 22.5-23 
(22.7); middle toe, 18-18.5 (18.2).° 
Dendrornis flavigaster megarhynchus Netson, Auk, xvii, July, 1900, 265 (Puerto 
Angel, Oaxaca; coll. U. 8. Nat. Mus.). 
[Dendrornis] megarhyncha SHaRpPe, Hand-list, iii, 1901, 78. 
Xiphorhynchus flavigaster megarhynchus OBERHOLSER, Smithsonian Misc. Coll., 
xlviii, no. 1579, May 13, 1905, 63. 
Southwestern Mexico, in States of Guerrero (El Naranjo; Aca- 
huitzotla; Sihuataenjo; La Unién) and western Oaxaca (Puerto 
Angel). : 
XIPHORHYNCHUS FLAVIGASTER YUCATANENSIS Ridgway. 
YUCATAN WOODHEWER. 
Very similar in coloration to X. f. mentalis, but averaging very 
slightly smaller (with slightly larger bill and feet), and throat always 
immaculate pale buff; much paler and grayer than X. f. flavigaster. 
Adult male.—Length (skins), 228-248 (238); wing, 104-118 (110.2); 
tail, 84-100 (90.9); culmen, 40-42 (40.8); tarsus, 22.5-24 (23.2); 
middle toe, 17-18.5 (17.5).¢ 
Adult female—Length (skins), 217-232 (226); wing, 100-111 
(106.4); tail, 85-94.5 (89.4); culmen, 39-43 (40.6); tarsus, 21-23 
(22.1); middle toe, 17.4 
Yucatan (Chichen-Itza; Puerto Morelos; Izalim; La Vega; Temax; 
Mérida; Tuloom; Peto; Buctzotz; Tabi; Meco Island).¢ 
Dendrornis eburneirostris (not Dryocopus eburneirostris ‘‘Lesson’’) LAWRENCE, 
Ann. Lyc. N. Y., ix, 1869, 201 (n. Yucatan).—Bovucarp, Proc. Zool. Soc. 
Lond., 1883, 450 (Yucatan; habits).—ScuatsEr, Cat. Birds Brit. Mus., xv, 1890, 
* Five specimens. , ¢ Nine specimens. 
b Two specimens. @ Specimens from Meco Island not seen by me. 
