Description of Plate XV. 



Fig. I. Cyrtonyx moniezumcB meariisi Nelson. $ from Chisos Mts., 

 Texas. Differs strikingly from C. montczumce (fig. 2) in paler gray 

 ground color and much larger and more crowded white spots on sides 

 of breast and flanks ; dark spots on wings larger. 

 Fig. 2. Cyrtonyx montezumce (Vigors). $ from Irolo, Hidalgo. Sides 

 of breast and flanks dark slate gray with medium sized white spots ; 

 wings marked with medium sized, rounded dark spots. 

 Fig. 3. Cyrt07iyx merriami Nelson. $ from east slope of Mt. Orizaba, 

 Vera Cruz. Differs strikingly from C. montezuma and C. saU(^i in 

 the uninterrupted extension of black throat patch down fore neck, 

 leaving a white patch on each side of neck in place of usual tvhite 

 collar; black cheek patch larger and extends down and joins black 

 throat area thus isolating malar white stripe from white area on side 

 of neck ; distribution of color on sides of breast and flanks similar 

 to same in C. montezumcB but ground color paler gray and white 

 spots smaller ; dark marks on distal half of wings larger and obovate 

 o^c flattened oval. 

 Fig. 4. Cyrtonyx sallcBiNtxx. cj from Ozolotepec, Oaxaca. White col- 

 '' lar on fore neck complete and united with white malar stripe ; distri- 

 bution of color on sides of breast similar to same in C. merriaini and 

 C. montezumcB ; sides of body back of breast darker slaty than in 

 merriami with the small white spots of latter replaced with larger, 

 more oblong spots of chestnut; wings much darker than in merriami 

 and -.uith narrow black bars in place of rounded spots. 



