THE THREE-TOED SAND GROUSE. 



spotted, a set of pale purplish marks beneath the surface of the 

 shell underlying the brown surface spots. 



All the Sand-Grouse are birds with immense powers of 



Fig. 4. — Sternum of/', atcnalas. 



flight, able to traverse great distances in a remarkably short 

 space of time. 



The majority of the species are migratory, some of them 

 wandering thousands of miles. 



THE SAND-GROUSE. FAMILY PTEROCLHXE. 



THE THREE-TOED SANU-GROUSE. GENUS SYRRILAPTES. 

 Syrrkapfes, Illiger, Prodr, p. 243 (181 1). 

 Type, S. paradoxus (Pall.). 

 This genus is distinguished from the rest of the Sand- 

 Grouse by the want of the hind-toe. The other toes, as well 

 as the feet, are entirely covered with feathers. 



I. PALLAS THREE-TOLD SAND-GROUSE. SYRRHAPTES 

 PARADOXUS. 



Tetrad par adoxa, Pall. Reis. Russ. Reichs. ii. p. 712, pi. F. 

 (i.773)- 



B 2 



