coo AVPESDIX. 



(54.) Page 35G, after A. californica : 



4816. Aphelocoma californica obscura Antuony. Belding's Jay.' 



Similar to A. adifornica, but ratlier smaller and decidedly darker, the back 



dark drab or brownish blate, the under parts more decidedly graj-isli and under 



tail-coverts more strongly tinged with blue. Hah. San Pedro Mountains, Lower 



California. 



(55.) Page 3CG, Dolichonyx oryzivorus albinucha : 



This supposed form is probably not valid, having been based upon breeding 

 males in which the color of the hind-neck, etc., was bleached. 



(56.) Pago 3G7, Genus MOLOTHRUS Swainson. 



Section a', including M. ceneus (Waol.), should constitute a distinct genus, 

 Callothrus Cassin (Pr. Ac. Nat. Sci. Piiil. 1SG6, 18, type, Psarocolius wneiis 

 AVagl.), the characters of which are as follows: — Feathers of hind-part and 

 sides of neck in the adult male much elongated, forming a very conspicuous, 

 soft, and dense erectile ruff; four outer primaries wiih inner webs curiously 

 sinuated and eniarginatcd, the web being expanded just beyond the middle 

 portion, the posterior extremity of the widened part forming an acute point, 

 projected longitudinally (less marked on the first quill). Two apparently dis- 

 tinct species constitute the genus, their distinctive characters being much more 

 obvious in the females than in the males. They may be thus characterized : 



b\ Bill decidedly stouter; adult female gra3-i8h bi'own (washed with plumbeous 

 in fresh plumage), lighter below, the feathers of back, etc., darker medi- 

 all)', producing more or less conspicuous streaks; adult male brighter 

 colored, with the bronze of head, neck, etc. more greenish (scarcelj', if 

 at all, duller on top of head than on back), and rump distinctlj' purple 

 or violet. JIab. Western Mexico (Mazallan, Manzanillo Bay, Colinia, etc.). 



C. aeneus (Waql.). Bronzed Cowbird. 



6^ Bill more slender; adult female, dull lilack, more or less glossed with bluish 

 or purple, especially on wings and tail ; adult male duller in color, with 

 bronze le.ss greenish (decidcdlj' duller on top of head than on back), and 

 with rump dull bronzj' scarcely, if at all, mixed or tinged with purplish 

 or violet. ITah. Eastern and southern Mexico, Yucatan, and south to 

 Panama; north to lower Eio Grande Valley in Texas. 



49G. C. robustus (Cab). Red-eyed Cowbird.' 



> Aphelocoma californica obtcura AiiTno:«Y, Proo. Cal. Ac. Sci. 2d sor. ii. Oct. 11, 1889, 75. 



' .Volollinm rohmliit CAn., Mu8. Ilcin. i. Sept. ISol, 19.1, footnote (Mexico). 



This is based on the adult female of the eastern bird. The description of Ptnrocoliut lenciit Wacl. agrees 

 minutely with the adult male of the wc'tern form ; and therefore, while the locality given is simply " Mexico," 

 I have preferred to restrict the name as above, rather than give a now name to the western species, which 

 would be the necessary alternative. The two species arc essentially identical in all measurements except of tho 

 bill, which is considerably stouter in C. /ciieua. 



