~ 
560 DR. O. FINSCH ON THE BIRDS OF TRINIDAD. [June 23, 
T append aremark on Trogon atricollis, Vieill. (Enc. Méth. p. 1361; 
Gal. Ois. i. p. 17, t. 31), with which Dr. Cabanis (Mus. Hein. iv. 
p- 181) unites 7. chrysochlorus, Natt. (Pelz. Sitzungsb. der math. 
naturw. Classe der Kais. Ak. d. Wiss. in Wien, vol. xx. 1856, p. 496), 
a species distinguished chiefly by its larger size. The Imperial 
Museum of Vienna possesses fifteen specimens of this large form 
from Ypanema in Southern Brazil, and nine specimens of the true 
T. atricollis from the north of Brazil (Borba, Marabitanas, Barra do 
Rio Negro), all collected by the late Johann Natterer. Von Pel- 
zeln, in his valuable publication on Natterer’s collections, still insists 
on the specific separation of the two species; and, as far as I can judge, 
he is right. We possess one specimen of the true 7’. atricollis 
from Guiana (Demerara), which is much inferior in size to the mea- 
surements noticed of 7. chrysochlorus by von Pelzeln. I therefore 
incline to believe that the 7. (Pothinus) atricollis described by 
Cabanis belongs to 7. chrysochlorus, as well as T. atricollis of 
Neuwied (iv. p. 309) and Burmeister (ii. p. 279). But to settle 
this question finally further researches are necessary. 
Fam. ALCEDINIDZ. 
20. CeRYLE AMERICANA (Gmel.); Léot. p. 112. 
Chloroceryle americana, Scl. Cat. p. 265; Taylor, 7. ec. p. 88. 
A female of this widely distributed species, agreeing with speci- 
mens from New Granada in the Bremen collection. 
21. CeryLe superciziosa (L.); Léot. p. 115. 
Chloroceryle superciliosa, Scl. Cat. p. 265; Taylor, 7. ec. p. 88. 
One specimen. 
; Fam. Ca@reBip&. 
22. DACNIS ATRICAPILLA (Vieill.). 
Chlorophanes atricapilla, Scl. Cat. p. 52; Taylor, 7. ¢. p. 81. 
Dacnis spiza, Léot. p. 122. 
Chlorophanes guatemalensis, Scl. 
Six males and one female. 
In comparing these specimens with others from Brazil, New Gra- 
nada, and Guatemala (Vera Paz), I must consider them all to belong 
to one and the same species, having convinced myself that there is 
no real constancy in the characters by which Mr, Cassin separated 
four local varieties or races, although there exists a considerable 
variability in respect of the green of the plumage, as well as in size. 
Two males from Trinidad are as bright green as our Guatemalan 
one; and a specimen from South Brazil (St. Catharina), collected 
by Burmeister, jun., differs very much less, having the bill nearly as 
large as the stout-billed specimens from Guatemala. Columbian 
specimens are not distinguishable from Trinidad ones; others from 
Trinidad are as dark green as others from Brazil. 
