NATURAL SCIENCES OF PHILADELPHIA. 65 



72. Tcrdus (Hylocichla *) nanus Andub. 



Rare ; spring and autumn migrant ; some breed ? A few probably winter ; 

 as it certainly does at Fort Mojave, where Dr. Cooper has found it in January. 

 A shy and retiring species, like T. pallusii. 



73. Turdus (Hesperocichla f) irfflvrirs Gmelin. 



Was obtained on the Colorado, between Forts Yuma and Mojave, by Lieut. 

 Ives' Expedition in 1853 ; but this locality must be considered as exceptional. 



74. Mimds polyglottus (L.) Boie. 



Common summer resident. Arrives third week in April ; remains until 

 latter part of September. I fouud it more numerous on the Colorado Chi- 

 quito than among the Whipple .fountains. My specimens from the Rio 

 Grande are quite like those from Arizona, of the variety cauilatus Baird. 



No. 1480, Adult. Iris yellowish green. Bill and feet blackish. No. 392, 

 adult. Iris ochraceous yellow. No. 560, young. Iris gray, mouth yellow, 

 feet leaden blue, soles dirty white ; bill above blackish, below chiefly dull 

 flesh color. 



75. Oroscoptes montanus (Towns.) Baird. 



It is a little singular that I never saw this species about Fort Whipple, 

 since it is so well known a bird of almost every portion of Arizona. 



(76.) Harporhynchus Lecontei (Lawr.) Bp. 



On the 30th of September, 186"), I had the pleasure of procuring the second 

 known specimen of this excessively rare and little known species. I found it 

 on a dry, barren plain, covered chiefly with mezquite and several genera of 

 Cactaceie, about fifteen miles from the Colorado River, just above Fort 

 Mojave. It was very shy and restless, fluttering hurriedly from one cactus 

 bush to another, till at last I shot it as it fancied itself hidden among the 

 thick fronds of a large Yucca. Its large strong feet admirably adapt it for 

 a partially terrestrial life, and it spends much of its time on th ground, 

 where it runs rapidly and easily. Its flight is swift but desultory, accom- 

 panied by continual flirting of the tail. A few days afterward I saw several 

 more in the same place. 



My specimen agrees exactly with Mr. Lawrence's type and description, and 

 presents all those differences from crissalis detailed by Prof. Baird in his Birds 

 of North America. Mr. Lawrence's type is from Fort Yuma. The species is 

 undoubtedly an inhabitant of the whole of the valleys of the Colorado and 

 Gila, probably not leaving these streams for mountainous regions. 



(77.) Harporhynchus crissalis Henry. 



Colorado and Gila valleys. Not observed at Whipple. " A few keep about 

 Fort Mojave." (Cooper.) 



The second known specimen of H. crissalis is in the Smithsonian, from 

 Fort Yuma, the original locality of U. Lecontei. The range of both species is 

 doubtless quite identical ; and the fact that, though thus associating, they 

 still preserve intact their distinctive fea ures, is a strong argument in favor 

 of their separation. I have myself examined Dr. Henry's type specimen of 

 //. crissalis, and find it sufficiently distinct from Lecontei, whatever may be its- 

 relations to the coast species rcdivivus. 



The "? Harporhynchus curvirostris " mentioned by Dr. Heermann in his 

 Report, as having been seen near Tucson, Southern Arizona, was undoubt- 

 edly either this or the preceding species. 



Hylocichla, Bair.l, Rev. N. A. Birls, 1S64, \>. 12. Subgenus propped for N. Amor. Wood 

 Th ushrw, as differing from Turdns proper with viscivonm as type, by their shorter, wider and 

 more depressed bills, length and slenderness of th" booted tarfci, etc. 



t Hefjte.rocichhi, Baird, Rev. N. A. Birds, 18t'5, p. 12. Tj pe T. nieviusGw.lxonus of Tona- 

 parte prove;, to belong to a different g oup. 



LS6ti.] 5 



