18/3.] CAROTID ARTERIES OF BIRDS. 463 



Cyanocorax cyanopogon. Strepera yraculina. 



Cissa speciosa. 



TRACHEOPHONiE. 



Pitta, sp. Pitangus sulphur atus. 



Rupicola crocea. Hylactes megapodius. 



Lipaugus cineraceus. Menura superba. 

 Tyrannus satrapa. 



MACROCHIRES. 

 Trochilid^e. 



The left carotid only is present in 

 Patagona gigas. Chlorolampis osberti. 



Cypselid^e. 

 The left carotid only is present in the following species : — 

 Cypselus apus. Chetura spinicauda. 



alpinus. caudacuta. 



Chetura vauxi. Dendrochelidon coronata. 



But both carotids were found to be present in a specimen of 

 Cypseloides fumigatus. 



Caprimulgidje. 

 Both carotids are present in these birds. 

 Species examined. 

 CaprhnuJgus europceus. C'hordeiles texensis. 



StEATORNITHIDjE. 



Both carotids are present in 

 Steatornis caripensis. 



PICI. 



PlCIDjE. 



The left carotid only is present in the Woodpeckers. 



Species examined. 

 Picus major. Chloronerpes yucatanensis. 



minor. Melanerpes formicivorus. 



Picoides tridactylus. Mulleripicus fidvus. 



Tigajavensis. Gecinus viridis. 



Leuconerpes candidus. Yunx torquilla. 



COCCYGES. 



CoRACIADjE. 



Both carotids are found in these birds. 

 Species examined. 

 Coracias garrula. Eurystomus, sp. 



