240 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 93 



There are three specimens in the collections of the U. S. National 

 Museum taken by Nelson and Goldman at Frontera, in eastern Tabas- 

 co, March 5 and April 26, and Monte Cristo, May 5, that belong to the 

 race conspectus? which differs from griseocauda in paler gray colora- 

 tion. 



BUTEO NITIDA PLAGIATA (Schlegel) 



Asturina plagiata Schlegel, Mus. Pays-Bas, vol. 2, Asturinae, 1S62, p. 1 (Veracruz, 

 Mexico). 

 One was seen April 12 at the border of an old field near Arroyo Cor- 

 redor. As Veracruz is the type locality of plagiata, it is assumed that 

 this is the race found at Tres Zapotes. In placing this bird in the genus 

 Buteo, I agree with van Rossem 12 that Asturina has no characters to 

 separate it. 



PARABUTEO UNICINCTUS HARRISI (Audubon) : Harris's Hawk 



Buteo Harrisi Audubon, Birds of America (folio), vol. 4, 1837, pi. 392 (Bayou Sara 

 and Natchez, Miss.). 

 On March 6, 1939, I observed a pair in a low tree standing in an 

 open savanna near Tlacotalpam. 



LEUCOPTERNIS ALBICOLLIS GHIESBREGHTI (Du Bus) 



Buteo ghiesbreghti Du Bus, Esquisses ornithologiques . . ., livr. 1, 1845, pi. 1 

 (Mirador, near Veracruz, Veracruz, Mexico). 



Carriker saw two of these beautiful hawks on the Cerro de Tuxtla, 

 where he collected a female at about 1,000 feet elevation on March 19. 



HYPOMORPHNUS URUBITINGA RIDGWAYI (Gurney) 



Urubitinga ridgwayi Gurnet, A list of the diurnal birds of prey, 1884, p. 148 

 (Guatemala and Mexico). 



In 1939 I saw this hawk on various occasions above Tlacotalpam but 

 did not secure specimens. Carriker shot one at Tlacotalpam on 

 February 19 and two on the Cerro de Tuxtla on March 13 and 19, 1940. 



The more extensive white banding on the tibia in the adult is an 

 excellent character that distinguishes most individuals easily from 

 the South American races. 



BUTEOGALLUS ANTHRACINUS ANTHRACINUS (Lichtcnstein) : Mexican Black Hawk 



Falco anthracinus Lichtenstein, Preis-Verzeichniss mexicanischer Vogel . . ., 

 1830, p. 3 (Mexico). 

 Near Tres Zapotes I noted these birds regularly in the woodlands 

 bordering milpas, where they often greeted me with high-pitched 



" Rupornis magnirostns conspecta Peters, Auk, 1913, p. 370 (San Ignacio, Yucatan). 

 13 Bull. Mus. Comp. Zool., vol. 77, 1934, p. 429. 



