1873.] CERTAIN MUSCLES OF BIRDS. 631 



the accessory semitendinosus, and the postacetabular portion of the 

 tensor fasciae ; the ambiens and the accessory femoro-caudal are 

 absent. 



Species examined. 

 Caprimulyus europceus. Chordeiles texensis. 



The TrogonidcB possess the femoro-caudal and the semitendinosus ; 

 the ambiens, the accessory femoro-caudal, the accessory semitendino- 

 sus, and the postacetabular portion of the tensor fasciae are absent. 



Species examined. 

 Troffon mexicanus. Trogon puella. 



The Meropidce possess the femoro-caudal, the semitendinosus, 

 and the accessory semiteHdinosus ; the ambiens, the accessory femoro- 

 caudal, and the postacetabular portion of the tensor fasciae are absent. 



Species examined. 

 Merops apiaster. Merops ornatus. 



The Cypselidce and the Trochilidce agree in possessing the femoro- 

 caudal, at the same time that the ambiens, the accessory femoro- 

 caudal, the semitendinosus, the accessory semitendinosus, and the 

 postacetabular portion of the tensor fasciae are absent. 



Species examined. 

 Cypseloides fumiyatus. Chlorolampis osberti. 



Oypselus apus. Chcetura vauxi. 



alpinus. , caudacuta. 



Dendrochelidon coronala. spinicauda. 



Patayona yiyas. 



The Coraciadce possess the femoro-caudal, the semitendinosus, the 

 accessory semitendinosus, and the postacetabular portion of the tensor 

 fasciae ; the ambiens and the accessory femoro-caudal are absent. 



Species examined. 

 Coracias garrula. Eurystomus, sp. 



The Momotidce possess the femoro-caudal, the semitendinosus, and 

 the accessory semitendinosus ; the ambiens, the accessory femoro- 

 caudal, and the postacetabular portion of the tensor fasciae are absent. 



Species examined. 



Momotus lessoni. Eumomota super ciliaris. 

 (squatoriulis. 



The Galbulidce possess the femoro-caudal and the semitendinosus ; 

 the ambiens, the accessory femoro-caudal, and the postacetabular 

 portion of the tensor fasciae are absent. 



In Galbula albirostris the accessory semitendinosus is present ; but 

 it is absent in TJroyalba paradisea. 



The Alcedinidce possess the femoro-caudal and the semitendinosus ; 

 the ambiens, the accessory femoro-caudal, the accessory semitendino- 

 sus, and the postacetabular portion of the tensor fasciae are absent. 



