392 BIRDS OF THE REPUBLIC OF PANAMA — PART 2 



stomach of a female taken near Cana, in Darien, held 2 large locustids, 

 2 sphingid caterpillars, fragments of a very large beetle, a cerambycid, 

 and remains of drupes. 



There has been some uncertainty in published descriptions of the 

 color of the eyelids in this species. Nutting (Proc. U. S. Nat. Mus., 

 vol. 6, 1884, p. 407) during work in Nicaragua recorded this as 

 "bare circumorbital space sky blue." This was reported by Ridgway 

 (U. S. Nat. Mus. Bull. 50, pt. 5, 1911, p. 744), with a reference 

 to Nutting, as "naked eyelids sky blue." Aldrich (Cleveland Mus. 

 Nat. Hist. Sci. Publ., vol. 7, 1937, p. 75) queried this, with the 

 statement that "the naked eyelid . . . was red rather than sky blue 

 as given by Ridgway." In life in adult males I have found the 

 thickened margin of the eyelids colored dull red to rose-red, with 

 the bare skin above and below dull green. 



As no trogons are known from the Archipielago de las Perlas, 

 the report by Bovallius (Resa; Central-Amerika 1881-1883, vol. 1, 

 1887, p. 138) of a Massena trogon seen between April 22 and 24, 

 1882, on Isla Pedro Gonzalez must be regarded as in error. Rendahl 

 (Ark. Zool., 1920, p. 33) in a report on collections made by Bovallius 

 included this record but with doubt as to the species. 



The species massena was named by Gould to honor Prince Francis 

 Victor Massena for his interest in "the science of zoology." The race 

 hoffmanni was dedicated to Dr. Hoffmann, companion to two other 

 Germans, Dr. A. von Frantzius and Dr. Ellendorf, pioneer collectors 

 in Costa Rica, whose specimens went to the Berlin Museum. The 

 name aurora is given to these birds in Panama by those who distin- 

 guish them from the smaller trogons. Among those who speak 

 English in Bocas del Toro they are called the "mountain parrot." The 

 Massena trogon also is known as the slaty-tailed trogon. 



Trogon massena as a species ranges from Oaxaca and Veracruz, 

 Mexico, south through Central America and western Colombia to 

 northwestern Ecuador. From Jurubida and Nuqui, central Choco in 

 northwestern Colombia southward males have the central rectrices 

 bluish instead of the brass green found in the northern group. 

 On this character they are separated as the race Trogon massena 

 anstralis Chapman. Coloration through the area to the north is uni- 

 form but there is a cline in size, with the birds larger from Mexico 

 through Honduras, smaller from Costa Rica and Panama to the 

 Rio Jurado, the falls on the Rio Truando, and the lower, eastern slopes 

 of Cerro Tacarcuna in extreme northern Choco, Colombia. Inter- 

 gradation between the two size groups comes in Nicaragua. 



