Se ee 
BIRDS—CAPRIMULGIDAE—CHORDEILES HENRYI. 153 
As a summary of the whole subject, I am inclined to think that all the varieties described 
belong to one species, varying somewhat with the locality, those from the Atlantic and, perhaps, 
Pacific regions being darkest, without much mottling ; those from the interior province, or from 
the Missouri to the Rocky Mountains, being much more varied, with a tendency to pale grayish 
tints in northern localities, and reddish in more southern, the latter of smaller size. In this 
generalization I would scarcely except the C. henryi. The C. texensis is, however, quite 
diferent. 
List of specimens. 
Catal.| Sex. Locality. When colleeted.| .Whence obtained. (Orig?! Collected by— Length.| Extent. | Wing. Remarks. 
No. No. 
Dark variety. 
ADO asieeie Oalcasieu, La... cccccicee-|occcss eecccccece G. Wurdeman.....|...... cee ccc cece cocceeveleees vennlcccscecs 
1522 | .....| Carlisle, Pa....... -| May 16,1846 | S. F. Baird 
AGODH | etslaievell woiswlewicc Ossi. sccenls eoe]/Jume 1051844) |. 0000. dO... cccece 
GOG4U MORN Stplouisesccccrsnecsls ss May 13,1857 | Lt. Bryan, U.S.A.. 
5592 |ooveee KKANSS oe ce ceccas voce cccelccccccicccccccces aes eUQecccccccicoce sete eeee 
7529 -| Independence, Mo........ ——  —,1857 | W. M. Magraw.....|.. «eae| Dr. J.G, Cooper...) 10.00 | 24,25 
6006 |...... Ort StellacoomssVVarl-cles|ccecsiviseeseeie see Dr. Suckley,U.S.A.. Sil Cmaineseciveciciscaisinsice Jace ccac|scscccce 
6007 |...... Cosumnes river, Cal. O «| Lt. Williamson..... 5 | Dr. Heermann, ...|+ececcee|teeeeees 
6008 |..... Tulare valley, Cal......... ag aise vce ipte saute |eivselee dO... wo0e evcece ON Predce Os vecicceccece Jeseeeeee|eeeeeees 
Pale variety. | 
6555 jecsees Mort Riley. cwelsccctenests ss lentes acieccietas sc Dr. WA; Ham Mond ||saseeslscveinceseecs ouselass.s | saancoca| hecosec5 
5595 3 70 miles west of Ft. Riley.) June 30,1856 | Lt. F. T. Bryan..... "48 | W.8. Wood..__.. | Panne venlceceesiee 
5593 | GO | 85 miles west of Ft.Riley.| June 30,1866 9 22, 
5201 | & | 40 miles above Ft. Pierre..| June 30,1856 9.25 | 22.25 
52022] @ |... dO eecdsess sese.| May 30,1856 9.25 | 23,25 
5203| Q |...... dOveveitessct A607 aeboe dow -ecn. 4 be .| 9.25] 93 
5594 | So Bridger’s Pass «.| August 13,1856 | Lt. F. T. Bryan W.S. Wood. el 9 s00)| a2. 
8224 | O | Fort Laramie............. Sept. 16,1857 | W. M. Magraw.....|...+05 Dr. Cooper ........ 8.40 | 21.50 
6228 | © |...... dos.caes Soieseeaeiaess| assed dOcestnnes| cases Giievcoctecece veeeeed0scecseacnes| 8:50 | 20.75 
8877 |... Black Hills ? (Camp 4)....) Sept. 7,1857 | Lt. Warren.. Dr. Hayden........| 9.25] 23.00 
8878 | G | Loup Fork. ..... Tellsetes|| JUly imi 24-11857)| | cheese dOsecas.. Sone sbessessiesecetes lhe 92251602505, 
26013 |......| Los Nogales, Sonora......) June —,1855 | Major Emory Dr. Kennerly....... [ence eeesleeeeenee 
CHORDEILES HENRYI, Cassin. 
Western Night-Hawk. 
Chordeiles henryi, Cassin, [llustrations,“I, Jan. 1855, 233. 
Sp. Cu.—Female similar to C. virginianus, but the upper parts much more mottled and more rufous. 
Hab.—Rocky Mountains of New Mexico. 
The specimens hitherto collected of this species are not sufficiently perfect to admit of a 
satisfactory description. The characteristics can only be given by comparison with C. virginianus, 
as already described. 
The skin upon which this species was based by Mr. Cassin is a female in very poor condition 
(6690,) and much stretched, which may account for its having been described as larger than 
C. virginianus. This is scarcely the case, as shown by the comparative measurements of the 
two. There is no undoubted specimen of the male bird in the collection before me from Texas, 
the only large one, with a decidedly white patch on the throat, lacking the white marks on the 
end of the tail. 
This species is conspicuously different from Pennsylvania specimens of C. virginianus in the 
very great amount of mottling on the upper parts, which exhibit nothing of the dark tones 
prevailing in the last mentioned skins. The predominent tint of the mottling is a yellowish 
rusty, brightest, and the blotches largest, on the scapulars. The under parts are yellowish 
20 b 
