12 BULLETIN 50^ UNITED STATES NATIONAL MUSEUM. 



[Parra] gymnostoma Sclater and Salvin, Nom. Av. Neotr., 1873, 142, part. 



/ [acaiia] gymnostoma Ridgway, Man. N. Am. Birds, 1887, 183, part. 



Jacana gymnostoma Zeledon, Proc. U. S. Nat. Mus., viii. May 25, 1885, 114 



(Costa Rica); Anal. Mus. Nac. C. R., i, 1888, 31 (Las Trojos de Alajuela and 



Siquirres, Costa Rica). 



JACANA SPINOSA GYMNOSTOMA (Wagler). 



MEXICAN JACANA. 



Similar to /. s. sjnnosa but averaging slightly larger (except bill 

 and feet), frontal shield smaller, and adults with color of under parts 

 duller, often tinged with brownish, and less abruptly defined against 

 the greenish black of chest. 



Adult male.— Wing, 112-124 (119.9); tail, 38-45 (41.3); bill from 

 nostril, 16.5-19.5 (17.5); from posterior edge of frontal shield, 36.5- 

 45.5 (41.5); tarsus, 46.5-55 (52); middle toe, 45-54 (51.3).« 



Adult female. —Wing, 130-139 (135.1); tail, 43-52 (46.5); bill from 

 nostril, 17.5-20 (19.2), from posterior edge of frontal shield, 40-49.5 

 (46.2); tarsus, 51-57 (54.3); middle toe, 48.5-56 (53. 1).'' 



Mexico, in States of Chiapas (Tonala), Tabasco (Teapa; San Juan 

 Bautiste), Yucatan (Buctzotz; Shkolak; Cozumel Island), Oaxaca 

 (Santa Efigenia; Zonatepec) ; Guerrero (Acapulco), Colima (Man- 

 zanillo Bay; Rio Zacatula; Rio de Coahuyana), Michoacan (Lake 

 Patzcuaro; Huinga), Jalisco (Zapotlan; Ocotlan; Guadalajara), 

 Sinaloa (Mazatlan; Presidio de Mazatlan), Guanajuato, Puebla 

 (Laguna de Epatlan), Vera Cruz (Jalapa; Jomotla; Jonatal; Santa 

 Ana; Tlalcotalpam; Cosamaloapam; Alvarado), and Tamaulipas 

 (Tampico, Alt a Mira), and Territory of Teplc (San Bias; Santiago; 

 Tepic), and lower Rio Grande Valley in Texas (Fort Browji; Browjis- 

 vUle). 



Parra jacana (not of Liunseus) Bonaparte, Proc. Zool. Soc. Lond., 1837, 114 

 ■ Mexico; crit.). 



Parra gymnostoma Wagler, Isis, 1831, 517 (Mexico). — Sclater and Salvin, 

 Proc. Zool. Soc. Lond., 1856, 283, part (Mazatlan, Sinaloa; Acapulco, Guer- 

 rero; mouogr.). — Lawrence, Mem. Bost. Soc. N. H., ii, 1874, 312 (Mazatlan; 

 Manzanillo Bay, Rio Zacatula, and Rio de Coahuyana, Colima; habits; 

 descr. nest and eggs); Bull. U. S. Nat. Mus., no. 4, 1876, 50 (Santa Efigenia; 

 Zonatepec).— Merrill (J. C), Bull. Nutt. Orn. Club, i, 1876, 88 (Fort Brown, 

 Texas); Proc. U. S. Nat. Mus., i, 1878, 168 (Fort Brown).— Ridgway, Proc. 

 U. S. Nat. Mus., i, 1878, 167, part, pi. 3 (synonymy, descr., etc.); iii, 1880, 201; 

 Nom. N. Am. Birds, 1881, no. 568.— Allen, Bull. Nutt. Orn. Club, v, 1880, 

 91 (Fort Brown, Texas).— Coues, Check List, 2d ed., 1882, no. 672.— Salvin, 

 Proc. Zool. Soc. Lond., 1883, 428 (Acapulco, Guerrero); Ibis, 1889, 379 

 (Cozumel Island). — Boucard, Proc. Zool. Soc. Lond., 1883, 462 (Yucatan). — 

 Baird, Brewer, and Ridgway, Water Birds N. Am., i, 1884, 176, part. 



[Parra] gymnostoma Sclater and Salvin, Nom. Av. Neotr., 1873, 142, part. 



P[arra] gymnostoma Coues, Key N. Am. Birds, 2d ed., 1884, 609, part. 



« Eleven specimens. 



b Nine specimens. Average measurements as given by Mr. Todd (Ann. Carnegie 

 Mus., x, 218) are as follows: 



Adult males (nine specimeuB) . — Wing, 117; tail, 41; "bill" (manner of measurement 

 not stated), 29; tarsus, 49. 



Adult females (six specimens). — Wing, 133.5; tail, 46; "bill," 31.3; tarsus, 51. 



