544 U. S. P. E. E. EXP. AND SUEVEYS — ZOOLOGY — GENEEAL EEPOET. 
clouded with olivaceous green on the back, less so on the rump, Bill and legs plumbeous, the former whitish at base. Length 
7.70 ; wing, 3.75; tail, 4.80. 
Hub. — Warm parts of Mexico. 
A specimen of this species, (No. 10201), a native of the warmer parts of Mexico, was presented 
to the Smithsonian Institution hy Mr. Sclater, and I introduce it here to show its near relation- 
ship to the I. audubonii. It is very like the audubonii, hut is smaller, the hill much stouter, 
shorter, and the culmen more curved. The third quill is longest ; the fourth, fifth, and second 
successively a little shorter ; the first and seventh about equal. The black of the head and 
neck comes further behind and on the sides than in audubonii. The wings are totally destitute 
of the white edges of quills and coverts as seen in audubonii. The tail, too, is entirely black. 
A criticism of the different names applied conjointly to this species and the I. audubonii will 
be found in the preceding article. 
ICTERUS PARISOKUM, Bonap. 
Icterus parisorum, (" Bon. Acad. Ronon. 1836.") Bp. Pr. Zool. Soc. V, 1837, 109. 
Xanthomas parisorum, Ib. Conspectus, 1850, 434. 
Icterus melanochrysura, Lesson, Rev. Zool. 1830, 105. 
Icterus scottii, Couch, Pr. A. N. Sc. Phil. VII, April 1854, 6G. (Coahuila.) 
Sr. Ch. — Rill attenuated ; not much decurved ; tail moderately graduated. Head and neck all round, breast, interscapular 
region, wings, and tail, black. Under parts generally, hinder part of back to the tail, middle and lesser upper, and whole of 
lower wing coverts, and base of the tail feathers, gamboge yellow ; a band across the ends of the greater coverts, with the edges 
of the inner secondaries and tertiaries, white. Length 8.25 ; extent, 11.75 ; wing, 4 ; tail, 3.75 ; tarsus, .95. 
Hab. — Valley of the Rio Grande; south to Guatemala. In Texas, found on the Pecos. 
The bill is slender and attenuated, very little decurved, much less than in /. cucullatus, 
slenderer and a little more decurved than in I. baltiviore. The tail is moderately graduated, 
the outer feather .45 of an inch less than the middle. 
In this species the black feathers of the neck, except below, have a subterminal bar of yellow ; 
elsewhere it is wanting. The black of the breast comes a little posterior to the anterior 
extremity of the folded wing. The posterior feathers in the yellow patch on the shoulders are 
tinged with white. The white in the bar across the ends of the greater coverts is confined 
mainly to the terminal quarter of an inch of the outer web. In the full plumage, there is only 
a faint trace of white on the edges of the primaries. The yellow of the base of the tail only 
extends on the middle feather as far as the end of the upper tail coverts ; on the three outer it 
reaches to within an inch and a quarter of the end of the tail. 
An immature male has the yellow more tinged with green, the black feathers of the head and 
back olivaceous with a black spot. 
In this species the second and third quills are equal and longest ; the first intermediate 
between the fourth and fifth. 
A specimen of this species collected in western Texas by Captain Pope, and the only one yet 
found within the limits of the United States, differs from those of Lieutenant Couch in being 
considerably larger ; the black feathers of the neck lacking entirely any subterminal yellow. 
The outer tail feather is proportionatelly a little longer. There is, however, nothing upon which 
to found a specific distinction, the difference in size being in accordance with what is usually 
seen between specimens of the same species from northern and southern breeding localities. 
