BIRDS OF NOETH AND MIDDLE AMERICA. 



359 



and Durango to northern Jali.sco (Bolafios), Territor}' of Tepic (Santa 

 Ttn-esa), and Zacatecas (Plateado, Valparaiso Mountains, etc.).** 



('!/a))(iciUa stelleri (not Cormis stcUcrl (Tmelin) Ga.mbkl, Jourii. Ac. Nat. Sci. 

 Phila., 2d ser., i, 1847, 45, part (Rocky Mts.).— Scorr, Auk, iv, 1887, 20 

 (Santa Catalina and Pinal mountains, Arizona). 



Cyanocorax stelleri (not of Bonaparte) Gambel, Proc. Ac. Nat. Sci. Phila., 1847, 

 201, part (Rocky Mts.).— McCall, Proc. Ac.' Nat. Sci. Phila., 1851, 216 

 (New Mexico). — Woodhouse, in Rep. Sitgreaves' Expl. Zuni and Col. R., 

 1853, 77 (New Mexico). 



Ci/diiura sfcllcri Coues, Ibis, 1865, 159, in text (Raton Mts., New Mexico). 



Cyanurus stelleri ScoTF, Bull. Nutt. Orn. Club, iv, 1879, 94 (Twin Lakes, Colorado). 



Clyanogarrulu!<'\ diaclematus Bonaparte, Consp. Av., i, May 6, 1850, 377 (Zaca- 

 tecas, w. centr. Mexico; coll. Darmstadt Mus. ). 



ILophocorax} diadematus Kaup, Journ. fiir Orn., ii, Nov., 1854, p. Iv. 



Cyanocitta diademata Salvin and Godman, Biol. Centr. -Am., Aves, i, 1887, 490, 

 part (Zacatecas; not description, which =C. s. azteca 'Ridgwa.y). 



«Four specimens from Durango (Cerro Prieto) and the above-mentioned localities 

 in Zacatecas and northern Jalisco are decidedly smaller than more northern examples, 

 and are api)reciably though not distinctly different in color. Instead of showing an 

 ai)pruach in the latter respect to C. s. azteca or C. s. coronatu, as might reasonably be 

 expected from geographical considerations, exactly the reverse is the case, the dis- 

 tinctive features of the inacrolopha type reaching their maximum development in this 

 series. The differences from typical examples of C. s. inacrolopha, while appreciable, 

 are, however, of such a character that I would not, without more ample material, 

 favor the subspecific separation of these southern birds. 



The average maximum and minimum measurements of this series and of a series 

 from the United States are given herewith : 



