Thayer and Bangh — Breeding Birds of North Central Sonora. 21 



Stelgidopteryx ruficollis serripennis (Aud.). 

 Opodepe. 



liirundo erythrogastra Bodd. 

 Opodepe. 



Compsothlypis pitiayumi pulchra (Brewst). 

 La Chumata. 



Setophaga picta picta (Swains.). 

 La Chumata. 



Tangavius* aeneus aeneus (Wagler). 



Oiiodepe. 



Molothrus ater obscurus (Gmel.). 

 Opodepe; La Chumata. 



Scolecophagus cyanocephalus (Wagler). 



Opodepe. As these specimens were taken at the very end of April and 

 none were seen in May, they most likely were migrants. 



Icterus wagleri Scl. 

 Opodepe. 



Icterus cucullatus nelsoni Ridg. 

 Opodepe ; La Chumata. 



Icterus parisorum Bp. 



La Chumata. 



Piranga rubra cooperi Ridg. 

 Opodepe ; La Chumata. 



Piranga hepatica Swains. 

 La Chumata. 



Astragalinus psaltria hesperophilus Oberh. 



Opodepe ; La Chumata. 



Carpodacus mexicanus ruberrimus Ridg. 



Opodepe ; La Chumata. This series represents a form clearly intermed- 

 iate between C. m. frontalis (Say) and the so-called C. m. snnorifusis Ridg. 

 of southern Sonora. Brewster, in " Birds of the Cape Region of Lower 

 California," t has shown that the latter is not sufficiently different from 

 C. m. ruberrimus of Cape St. Lucas to stand as a subspecies. It is always 

 unpleasant to have to decide by what name to call an intergrade, 

 and in this very instance other ornithologists might not agree with 

 us. We have decided to call the specimens ruberrimus because they agree 

 in measurements with a series of that form taken by Brown at Guaymas. 

 In color the adult males are perhaps rather nearer frontalis, but there is 

 much individual variation in both series. 



* For use of Tangavius in place of Callothrus, Cf. Nelson, Proc. Biol. Soc. Washington, 

 Vol. XVIII, p. 125, Apr. 18, 1905. 

 t Bull. Mus. Comp. Zool. Vol. XLI, pp. 133-135, Sept., 1902. 



