220 The Ohio Journal of Science [Vol. XVIII, No. 6, 



Chars, siibsp. — Similar to Corviis corax europhilus, but wing 

 and middle toe shorter, and bill decidedly smaller. 



Measurements.^ — Male:- wing, 415.5-459.5 (average, 434) 

 mm.; tail, 223-254 (239); exposed culmen, 64-70 (66.8); height 

 of bill at nostrils, 23-26 (24.4) ; tarsus, 68-73 (71.5) ; middle toe 

 without claw, 41-56 (46.5). 



Female :3 wing, 419-432 (average, 422) mm.; tail, 236-252 

 (246.5); exposed culmen, 63-71 (66.3); height of bill at nostrils, 

 24-25 (24.5) ; tarsus, 65-73.5 (70) ; middle toe without claw, 

 44.5-47 (46.5). 



Type locality. — Orizaba, Vera Cruz, Mexico.^ 



Geographic distribution. — Middle western Canada, middle 

 western United States, and Mexico, to Honduras. Breeds 

 north to Slave River and Fort Simpson, southwestern Mac- 

 kenzie; west to Sicamous, Shuswap, and Okanagan, central 

 southern British Columbia; northeastern Washington (proba- 

 bly); Fort Sherman, Idaho; western Wyoming; western 

 Colorado; Fort Wingate, western New Mexico; San Luis 

 Mountains, Mexican Boundary Line, southwestern New Mex- 

 ico; San Pedro River, at the Mexican Boundary Line, south- 

 eastern Arizona; Quitovaquita, southwestern Arizona; Guay- 

 smas, western Sonora; Mazatlan, western Sinaloa; and Tepic; 

 south to Tehuantepec, Oaxaca; Guatemala; and northern 

 Honduras; east to northern Honduras; Vera Cruz, Mexico; 

 San Antonio, central Texas; the Canadian River, central 

 Oklahoma; Fort Riley, eastern Kansas; Fort Randall, central 

 southern South Dakota; and Ramsey County, central northern 

 North Dakota. 



Remarks. — Compared with Corvus corax principalis, this 

 race is smaller, with a particularly small bill, which is relatively 

 as well as actually more slender. As will be noticed in the 

 geographic distribution above given, the range of this form has 

 been restricted in southwestern North America by the recogni- 

 tion of Corvus corax clarionensis as a bird of the mainland 

 as well as the islands off the southwestern coast; and extended 

 by the inclusion of a large area in middle Canada, the birds 

 inhabiting which are much nearer this southern race than to 



^Cf. footnote on p. 214, binder Corvus corax principalis. 

 ^Nine specimens, from Guatemala, central and southern Mexico. 

 ^Five specimens from Guatemala, central and southern Mexico. 

 ^Here for the first time definitely fixed. 



