518 APPENDIX. 



fii-st week of April, lie describes it as a shy, active, and restless bird, generally 

 frequenting the extreme tops of the tallest cottonwood-trees near the borJei's 

 of the watercourses, which, however, arc usually dry. 'i'here the bird flutters 

 through the dense foliage in search of insects, and is scarcely ever seen for more 

 than an instant at a time. It commences building about the first of June. The 

 nest is suspended from the extremities of the lower branches of an ash, walnut, 

 mesquite, or Cottonwood tree, and is exclusively composed of fine wire-like grasses, 

 which are made use of while green and plial)lc, and sparsely lined with the silky 

 fibres of a species oi Asdepias. These grasses arc interlaced in such a complicated 

 manner as to form, oven when dry, a very strong structure. The dimensions 

 of a nest are : luucr diameter, three inches ; inside depth the same ; outside 

 from five and a half to four inches wide and about four deep. The eggs are 

 from two to four in number, usually three, are of a pale bluish-white ground, 

 spotted with dark lilac and umber-brown about the larger end. The largest eggs 

 measure one inch by .04. Captain Bendire adds that he cannot regard this Oriole 

 as a fine singer. Besides a usual chattering note resembling the syllables char- 

 char-char, frequently repeated, it has a call-note something like hut-wit, which is 

 also several times repeated. 



Icterus baltimore (II, 195). Extends its range westward to the Rocky 

 fountains. Collected in El Paso County, Colorado, by Mr. Aiken. 



Icterus bullockii (II, 199). Extends eastward to Eastern Kansas, where it 

 is not uueoiumou. (.See .Snow's Catalogue of the Birds of Kansas, 1873.) 



Corvus cryptoleucus (II, 242). According to Mr. Aiken this species is 

 abundant, and nearly i-ejilaccs C. carnivorus along the eastern base of tlie Rocky 

 Mountains, as for north as Cheyenne. 



Captain Bendire found this a resident species in Southern Arizona, and met 

 with two nests at the base of the St. Catharine Mountains, near Tucson. One of 

 these contained three, the other four eggs. These he described as very light col- 

 ored, so pale that if mixed with hundreds of others of this family they could be 

 picked out without difficulty. Their ground-color is said to be a very pale green, 

 with darker markings running more into lines than spots ; in fact, very few spots 

 were found on either set. The size of the largest was \M inches by 1.33, that 

 of the largest 1.70 by 1.19. They were not common in the vicinity of Tucson. 



Cyanura (II, 271). For a special treatment of the races of C. stelleri, see Am. 



Jiiurn. Science and Arts, .Tanuarv, 1873. 



Cyanocitta californica (II, 298). Dr. Cooper has ascertained that this 

 species does occur on the castera slope of the Sierra Nevada, but lower down than 

 the region he visited iu 1803. Ho found a few at Verdi, close to the eastern boun- 

 dary-line of California, at about 4,.50() feet elevation, in July, 1870. He saw none 

 elsewhere. 



' Tsrrannus vociferans (U. 327). Captain Bendire writes that this species 



arrives in the nciglilH.rl 1 uf Tucson about the middle of April, but does not 



commence nesting until the middle of June. All the nests he found were difficult 

 to get at, being generally placed on a branch of a large cottonWogd-tree, and at a 

 distance from the trunk. The nest is described as very large for ttie size of the 



