Recently published Ornithological Works. 711 
reichenowi from the Rio Tocantins; Chloronerpes paraensis 
from Para; Thamnophilus huberi from the Rio Tapajoz; 
Dysithamnus capitalis squamosus from the Tocantins; Anaplops 
berlepschi from the Tapajoz; Grallaria macularia berlepschi 
from the Tocantins ; Xiphorhynchus multostriatus from the 
Tocantins; Myiobius erythrums hellmayri from Para; Eu- 
scarthmus johannis from the Rio Purus ; E. zoster ops minor 
from the Tocantins ; Euscarthmus griseipectus from the 
Tocantins; Setophaga pallida from the Tocantins; Pipra 
fasciata purusiana from the R. Purus; Pachysylvia musci- 
capina from the Tapajos; and Sporophila leucoptera cequa- 
torialis from Mexiana. 
We venture to remark that some of the characters which 
are given to separate the subspecies are rather finely drawn. 
But we much rejoice that the authorities of the Goeldi 
Museum are continuing to work out the products of the 
vast region of the Amazon and its affluents. 
105. Stone on the Cuckoos of the Genus Piaya. 
[A Review of the Genus Piaya, Lesson. By Witmer Stone. Pr. Ac. 
N. Sc. Phil ad. (1908).] 
In re-arranging the Cuckoos in the great Collection of 
Birds at Philadelphia Mr. Stone was induced by the discovery 
of the neglected type of Piaya macroura to undertake a 
study of all the species of that genus. Two species of Piaya 
are unmistakable—P. melanogastra and P. minuta (called 
by Mr. Stone P. rutila). But P. cay ana and its near allies 
form a very puzzling group. To enable him to understand 
them better Mr. Stone borrowed examples from other 
American Collections, and thus got together a series of 259 
specimens, which gave him a good basis to work upon. 
The result is that Piaya cayana, according to him, is 
divisible into 11 representative subspecies, two of which 
(P. c. caucce and P. c. boliviano) are now described for the 
first time. 
Mr. Stone wishes to change the name of Piaya minuta to 
