ON CERTAIN MUSCLES OF BIRDS. 193 
The Meropide possess the femoro-caudal, the semitendinosus, and 
the accessory semitendinosus; the ambiens, the accessory femoro- 
caudal, and the postacetabular portion of the tensor fasciz are absent. 
Species examined. 
Merops apiaster. Merops ornatus. 
The Cypselide and the Trochilide agree in possessing the femoro- 
caudal, at the same time that the ambiens, the accessory femoro- 
caudal, the semitendinosns, the accessory semitendinosus, and the 
postacetabular portion of the tensor fasciz are absent. 
Species examined. 
Cypseloides fumigatus. Chetura spinicauda. 
Cypselus apus. Dendrochelidon coronata. 
—— alpinus. Chlorolampis osbertt. 
Chetura vauxi. Patagona gigas. 
The Coraciide possess the femoro-candal, the semitendinosus, the 
accessory semitendinosus, and the postacetabular portion of the tensor 
fascize; the ambiens and the accessory femoro-caudal are absent. 
Species examined. : 
Coracias garrula. Eurystomus, sp. 
The Momotide possess the femoro-caudal, the semitendinosus, and 
the accessory semitendinosus; the ambiens, the accessory femoro- 
caudal, and the postacetabular portion of the tensor fasciz are absent. 
Species examined. 
Momotus lessoni. Eumomota superciliaris. 
— equatorialis. 
The Galbulide possess the femoro-caudal and the semitendinosus ; 
the ambiens, the accessory femoro-caudal, and the postacetabular 
portion of the tensor fasciz are absent. 
Tn Galbula clbirostris the accessory semitendinosus is present; but 
it is absent in Urogalba paradisea. 
The Alcedinide possess the femoro-candal and the semitendinosus ; 
the ambiens, the accessory femoro-caudal, the accessory semitendino- 
sus, and the postacetabular portion of the tensor facie are absent. 
Species examined. 
Alcedo ispida. Dacelo cervina. 
Ceryle amazona. gigantea. 
Haleyon, sp. Cittura cyanotis. 
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