■2/j. Brewstkr on a Colled ioti of Arizona Birds. [Janunrv 



Sexes similar. 



Habitat. Arizona; New Mexico; east to Western Texas (El Paso). 

 Table lands of Mexico. 



Callipepla squamata castanogastris var. nov. Chestkut-bei.lied 

 Scaled Quail. 



Ch. Sp. $ similis C. squamatce. sed colore in toto magis plumbeo; 

 capitis lateribus et vertice obscurioribus ; macula ferrugineo-castanea in 

 abdomine. $ dissimilis, pallidior ac sine macula castanea. 



Adult. $ (No. 6547 — collector's No. 1640 — Rio Grande City, Texas, 

 November 11, 1880. M. A. Frazar). Entire upper parts, with sides of 

 -head, and a broad space across breast, deep bluish-cinereous, tinged with 

 olive on the back, wings, and crown : throat deep butf. in marked contrast 

 with the bluish of cheeks and breast ; under tail-coverts and crissum 

 warm brownish-cinnamon ; abdomen pale brownish-orange, with a broad, 

 elongate, central patch of dark rusty-chestnut; otherwise with the mark- 

 ings as in C. squamata. 



Adult $ (No. 6546 — collector's No. 1655 — Rio Grande City, Texas, 

 November i6, 18S0. M. A. Frazar). Paler beneath than the $ , and 

 without any trace of the abdominal chestnut patch. 



Habitat. Valley of the Lower Rio Grande in Texas ; Eastern Mexico 

 (New Leon). 



The prominent differential characters of these two races mav be more 

 briefly given as follows : — 



C. squamata. — General coloring pale and faded; crown and sides of 

 head scarce!}' darker than throat, and rarely with any bluish tinge; no 

 decided chestnut patch on abdomen ; sexes similar. 



C. squainata castanogastris. — General coloring" deep and rich ; crown 

 concolor with back, and cheeks with breast, — both very much darker than 

 throat; abdomen with a conspicuous central patch of solid rusty-chestnut; 

 sexes dissimilar, the $ lacking the abdominal chestnut patch, and being 

 much lighter colored than the $ . 



The individual and geographical variation shown by my series of 

 eighteen specimens of C squatnata proper, is comparatively slight' 

 New Mexican examples seem to be a trifle bluer than Arizona ones, and 

 autumnal birds from both Territories are richer-colored than those taken in 

 spring and summer; but all are very much paler than my types of C. cas- 

 tanogastris, while in none of them is there any decided chestnut patch 

 beneath, the nearest approaches showing only a slight rusty tipping on 

 a few of the feathers. I have not been able to examine as large a number 

 of the Texas form, but Mr. Frazar, who has shot upwards of a hundred in 

 the valley of the Lower Rio Grande, assures me that the adult male never 

 lacks this conspicuous feature. The material in the National Museum, 

 which Mr. Ridgway has kindly placed at my disposal, fully bears out the 

 above generalizations. 



The following specimens of C. squamata were collected b}- Mr. Stephens 

 during his late trip. 



6318, 5 ad.. Camp Bowie. January 10. Length, 10.60; extent, 14.80; 

 wing, 4.53; culmen. .63. 



