THE REPTRI 



hum XI.lli 



STANBURY'S SWIFT, Via slansburiana 



Abundant in the sterile areas of the Southwest. Note the equal-sized 

 of the back 



WHITE-BELLIED SWIFT, Ufa symmelrica 



Common in Arizona and New Mexico. Note the rows 



of enl-irged scales on the back 





CLARK'S SWIFT. Srrloporus rlarkii 

 One of the lamest of the iwifts. There is a tpot of blue or gr-n in each of the scales on the back 



