510 ALAUDID^, 



[Note. — Dr. Duges, in his list of Guanajuato birds published in the first volume of 

 ' La Naturaleza,' includes two other species of Corvidse as found in the neighbourhood 

 of the town in which he resides ; but we have not put them formally into our list, as 

 their occurrence so far south in Mexico is perhaps only casual, and no other writer 

 makes any mention of them. These species are : — 



1. CoEViTS AMEEICANUS, Aud., Duges, La Nat. i. p. 139 ; Baird, Brew., and Kidgw,,. 

 N. Am. B. ii. p. 243. 



A species of wide range in North America from the fur countries southward, and 

 also found in the frontier State of Texas. Dr. Duges gives it from Guadalajara and 

 Guanajuato ; possibly the bird referred to is C. meodcanus. 



2. Pica hudsonica, Bp., Duges, La Nat. i. p. 139. 



Pica caudata, var. hudsonica, Baird, Brew., and Eidgw. N. Am, B. ii. p. 266. 



This species, which is now considered by many writers to be inseparable from the 

 European Pica Tustica, is found throughout the northern and western parts of North 

 America and in the Rocky Mountains to New Mexico and Arizona. Dr. Duges records^ 

 its occurrence from Guanajuato.] 



Fam. ALAUDID.ai. 



OTOCOEYS. 



Otocoris, Bonaparte, Icon. Faun. Ital. Ucc. Intr. fol. **** (1839). 



Otocorys, Dresser, B. Eur. iv. p. 385. 



Eremophila, Boie, Isis, 1828, p. 322; Baird, Brew., & Ridgw. N. Am. B. ii. p. 139. 



Otocorys is the only genus of the Alaudidse found permanently in America, where it 

 occurs over the greater part of the northern continent from the shores of the Arctic 

 Ocean to the plateau of Mexico, and in South America there is an outlying colony in 

 the Andes of Colombia. The genus has also a wide range in the Old World, where it 

 is represented by several closely allied forms, the limits of some of which are not clearly 

 defined. The same is the case in America, where several races have been distinguished,, 

 our Mexican bird being one of them. 



The bill of 0. chrysolcema has no trace of a notch at the end of the maxilla, the 

 tomia is very slightly curved ; the nostrils are completely covered by stifi" feathers, with 

 which are mingled some strong decurved bristles. The toes are rather short, and the 

 claw of the hind toe strong and nearly straight. The wings are long and pointed, the 

 three outer primaries forming the point, the second being slightly the longest ; the 

 inner secondaries slightly exceed the inner primaries. The tail is moderate, and nearly 

 even at the extremity. 



