294 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



CALOCITTA COLLIEI (Vigors). 

 COHIE'S MAGME-JAT. 



Adults {sexes alike). — Frontal, loral, postocular, and auricular 

 regions, chin, throat, and chest, uniform black; crest black, the longer 

 feathers more or less distinct^ bluish at tips; a superciliary spot of 

 pale blue or bluish white, extending posteriorly to beneath the crest, 

 where deepening into the dull campanula blue of the occiput; a 

 bifurcated malar patch of flax flower blue, the upper arm extending 

 upward to the lower ej^elid, the lower edge margined with white; 

 upper parts, except as described, plain blue, duller or more grayish 

 on back and scapulars, deeper (dull french blue, or approaching 

 cyanine blue) on upper tail -co verts and tail; four lateral rectrices 

 very broadly and abruptly tipped with white; under parts, posterior 

 to chest, white, the sides and flanks tinged with gray; bill, legs, and 

 feet black. 



Young. — Similar to adults, but all the feathers of the crest broadly 

 and abruptly tipped with white, feathers of occiput and hindneck also 

 tipped with white (these tips broader on lateral portions, forming con- 

 tinuous white bordering upper and posterior margins of black auric- 

 ular space), and pale blue superciliary patch absent (replaced by black). 



Adult mrt/'r^— Length (skins), 664-749 (693); wing, 210.5-221 (214.5); 

 tail, 435-508 (463.5); exposed culmen, 33-36 (34.5); depth of bill at 

 nostrils, 14.5-15 (15); tarsus, 44.5-48 (47); middle toe, 27.5-30.5 (29.5).« 



Adultfemale.—Lmgt\i (skins), 575-724 (653.5); wing, 198-216 (205); 

 tail, 406.5-508 (443.6); exposed culmen, 33-36 (34); depth of bill at 

 nostrils, 13-15 (14.5); tarsus, 44. .5-47. 5 (46); middle toe, 30-31.6(30.5).'' 



Western Mexico, north to southern Sonora (Alamos, Camoa, 

 Plomosas, etc.) and western Chihuahua (Jesus Maria, El Carmen, etc.), 

 south to Jalisco (San Sebastian, Zapotlan, Guadalajara, etc.), east to 

 Guanajuato and Durango (Huasamota). 



[Occasional specimens show a greater or less amount of white or pale 

 bluish on the throat and chest, sometimes forming a large patch, mar- 

 gined below by a black collar. Such examples have the appearance of 

 being hybrids or "intergrades" between C. eolllel and C formosa; 

 but since among them are specimens from extreme northern localities, 

 they can only be considered as representing individual variation; 

 hybridism or intergradation with C. formosa being of course possible 

 only where the two occar together, which, if anywhere, would be in 

 the extreme southern portion of the range of C. collie i.'\ 



Pica colliei Vigors, Zool. Journ., iv, 1829, 353, pi. 12 (San Bias, Territoria de 

 Tepic, w. Mexico; type in coll. Brit. Mus.); Zool. Yoy. "Blossom," 1839, 22 

 pi. 7 (San Bias; Mazatlan). — Schlegel, Mus. Pays-Bas, Coraces, 1867, 43 

 (w. Mexico). 



o Seven specimens. 



