CUCULID.E — THE CUCKOOS. 471 



and green ; nearly all with opaque white edges ; beneath white, with black 



Gforoccyx rfthforninmis. 



streaks on the sides of neck and breast ; the feathers with broad white tips ; 

 the principal differences are as follows : — 



G. californianus. Bill above, about 2.00 ; gape nearly straight to near 

 tip; nostril behind middle of gape. Feathers of throat and upper part of 

 breast light brownish, with shaft-streaks of black, Hab. Southwestern 

 Uniti-d .'States, from Cape St. Lucas and Southern California to Texas. 

 G. aflBnis.' Bill above about bCO ; gape gently curved throughout. Nostril 

 opposite middle of gape. Feathers of throat and breast fulvous-white, 

 witliout shaft-streaks, except on the sides, where they are broad and aliruptly 

 defined. Hab. Mexico, from Mazatlan to Xalapa. 



This last species is common at Mazatlan, as weU as elsewhere in Mexico, 

 and may yet be found in Arizona. 



1 Geococqjx affims, H.\KTLAun, Rev. Zool. 1844, 215. — Boxap. 97. — ScL. V. Z. S. 1858, 

 305. — ScLATER & Salvin, Ibis, 1859, 134. — ScL.iTEn, Catal. 1862, 325. Geococci/x vclox. 

 Karw. Boxap. 97. 



