BIRDS OF COLORADO. 43 



dias, grus americana, rallus virginianus, reatrvirostra americana, 

 gallinago delicata, tringa maculata, numenius longirostris, bubo vir- 

 ginianus subarcticus, geococcyx californianus, dryobates pubescens 

 homorus, sphyrapicus varius, tyrannus vociferans, myiarchiis cineras- 

 cens, empidonax traillii, otocoris leucolcema, corvus cryptokucus, corvus 

 americanus, cyanocephalus cyanocephalus, cocccthraustes vespertina, 

 leucosticte tephrocotis, zonotrichia leucophrys intermedia, spizella mon- 

 ticola ochracea, spizella sccialis, jimco atkeni, junco kyemalis, junco 

 hyemalis connectens, junco mearnsi, pipilo maculatus arcticus, pipilo 

 fuscus mesoleueus, clivicola riparia, ampelis garrulus, ampelis cedro- 

 rum, lanius borealis, helminthophila virginice, helminthophila celata, 

 compsothlypis americana, dendroica coronata, dendroica nigrescens, 

 geoihlypis trichas occidentalis , cistothorus palustris paludicola, parus 

 inornatus griseus, psallnparus plumbeus, regulus satrapa, sialia sialis. 



1873. Aiken. Am. Nat. VII. 1873, 13, Mr. Aiken records 

 here ammodramus bairdi for Colorado. 



1873. Ridgway. Bull. Essex Inst. Nov. 1873, ^T9- T^is is 

 one of the most important and, at the same time, one of the 

 most unsatisfactory publications ever issued concerning Colo- 

 rado birds. It gives a list of 243 species known to occur in 

 Colorado, of which 59 had never before been credited to the 

 State. The list is entirely a compilation and much of it from 

 manuscript notes of various persons and collections, yet, for 

 the most of these species, no source of authority is given; 

 for several the source is given incorrectly, and for some it is 

 impossible at this day to ascertain the basis for including them 

 in the list. The list is based largely on the records of Mr. Aiken, 

 and to him belongs most of the credit for the notes on distribu- 

 tion during the breeding season. Many of the species are 

 included on the authority of Mr. Henshaw who had lately taken 

 them and allowed of their publication here in advance of his 

 own notice that appeared at a later date. Several of the rarer 

 species owe" a place in the list to their occurrence in the Maxwell 

 collection, a complete list of which was not published until 

 1877. And, as stated above, ihere are some species whose source 

 cannot be now ascertained. The following species appear in 

 this list for the first time ; those marked with one star having 

 been taken by Mr. Aiken, those with two stars by Mr. Henshaw^ 

 and those with the asterisk are in the Maxwell Collection. 

 ** Colymbus mgricollis californicus, \podilymbus podiceps., furz- 

 nator imber., ^larus delawarensis, sterna forsteri., \pelecanus 

 erythrorkynchos^ ^merganser americanus., \lophodytes cuculla- 

 ius, *anas obscura, aythya marila nearctica, '\branta canadensis, 

 olor buccinator ., \plegadis guarauna., tardea candidissima, '\por- 

 zana Carolina, **fulica americana, '\steganopus tricolor, **tringa 

 bairdii, \tringa alpina pacifica, **ereunetes pusillus, **symphemia 



