492 MR. 0. SALVIN ON THE AVIFAUNA 
Genus PYROCEPHALUS. 
This genus is of purely Neotropical range, its most northern range extending in 
P. meaicanus to Mexico. In P. rubineus it is found in imperfectly segregated races 
all over the greater part of the southern continent, including the shores of Ecuador 
opposite the Galapagos Islands. P. nanus is closely allied to the other species of the 
genus, and strictly congeneric with them. 
PYROCEPHALUS NANUS. 
Pyrocephalus nanus, Gould, Zool. Voy. Beagle, iii. p. 45, t. vii.; Scl. & Salv. P. Z.S. 1870, p. 323; 
Sundev. P. Z. S. 1871, p. 125. 
Pyrocephalus dubius, Gould, Zool. Voy. Beagle, ii. p. 46. 
¢ (Indefatigable Island) fusco-niger: pileo toto et corpore subtus coccineis: tectri- 
cibus subalaribus rosaceis: rostro et pedibus nigris: long. tota 4°25, ale 2°5, caude 2°5, 
tarsi 0-7, rostri a rictu 0-7. 
? (Indefatigable Island) fusca, alis caudaque paulo obscurioribus: loris et corpore 
subtus albis, abdomine luteo induto: rostro et pedibus nigris: long. tota 4:5, ale 2°5, 
caudee 2:1, tarsi 0°75, rostri a rictu 0°7. 
¢ juv. feminz omnino similis, sed pectore striis fuscis indistincte notato. 
Hab. “Several islands of the Galapagos” (Darwin); Indefatigable and Bindloe 
Islands (Habel); Indefatigable and James Islands (Sundevall). 
Having examined the types of P. dudius in the British Museum, I believe them 
to be young males of P. nanus. This may account for their different appearance in 
life from P. nanus, to which Mr. Darwin alludes. It also accounts for the slightly 
smaller dimensions compared with the adults to which I believe them to belong. 
“Nearly related to a common and favourite species of the mainland of Ecuador, 
which is known by the name of ‘Chocoterin.’ The female is tamer than the male, 
and frequents shady spots under the trees. The male seeks a solitary bush, from 
which he darts upon his prey. The plumage of the young male resembles that of the 
female. This species was found on all the islands visited.”—H. 
Genus MYIARCHUS. 
This, too, is a member of a Neogean family, the species of which are distributed over 
the greater part of the two continents, as well as the West Indies. Its nearest allies are 
perhaps the island races of the Antilles rather than those of the continent; and in this 
respect the affinities of Dendraca aureola are, to some extent, repeated; but in the 
present case the specific differences of /. magnirostris are well defined. 
