28 



JACK BABBITS OF THE UNITED STATES. 



between these measurements and those of any particular specimen 

 with the diflt'ereuce obtained by subtracting the measurements of the 

 young from those of the adult of that species. 



List of young Jack Rabhits, shoiving time of Mrth. 



Spscies. 



Locality. 



Total iHind 

 length, foot. 



Lepus alleni June 12, 1892 



Lepus calif ornimg.' 



Do 



Do 



Do ; 



Do i 



Lepus campestris . . \ 



Do I 



Do* 



Do* ! 



Do* 



Lepus melanotisi . \ 



Do* ] 



Dot I 



Dot 



Do 



Do 



Do ; 



Dot 



Dot : 



Dot ; 



Lepus texianut 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Leputsp (?) 



Dot. 



Do 



Do 



Mar. 18, 

 Mar. 23, 

 Apr. 15, 

 Apr. 18, 

 May 1, 

 May 23, 

 May 24, 

 May 28, 



do . 



Sept. 10, 

 Mar. 4, 

 Mar. 9, 

 Apr. 12, 

 July 6, 

 Ai)r. 26, 

 July 30, 

 Sept. 3, 

 Sept. 17, 

 Sept. 17, 

 Oct. 11, 

 Jan. 10, 

 Mar. 27, 

 Apr. 10, 

 Apr. 27, 

 May 9. 

 May 18, 

 MnV 22, 

 Juiio 11, 

 July 17, 

 July 20. 

 Si-p"f.21, 

 Jan. 23, 

 Sept. 30, 

 Aug. 14, 

 do . 



1891 

 1892 

 1891 

 1889 

 188!l 

 1K91 

 1S94 

 1K90 

 1893 

 1892 

 lK«:t 

 1802 



Riliito Creek, Arizona . 



San Fernando, Cal . . . 



Jackson, Cal 



Oakdale, Cal 



Chinese Camp, Cal... 



Priest Valley, Cal 



Newcastle, \Vyo 



do 



Fort Pierre, S. Dak.. 



do 



Fort Bu lord, X. Dak. 



San Antonio, Tex 



Onaga. Kaus 



Sau Antonio, Tex 



....do 



Vernon, Tex 



Cairo, Kaus 



Onaga, Kans 



San Antonio, Tex 



do 



Mm. 

 455 



375 

 405 

 390 

 420 

 410 

 344 

 350 

 460 

 445 

 265 



.do. 



Panamint Valley, Cal . . . 

 Grapevino Mountains, N 



Furnni (• Creek, Cal 



Fort IJuachuca, Ariz 



lieaverdani, Ariz 



Pha-iiix, Ariz 



Carson, Ney 



Loiif Pino. Cal 



.South Fi.rk, Pitt Kiver, Cal 



Arco, Idaho 



Santa Uosulia, Chihuahua 



ilatagorda, Tex 



Kockpiirt, Tex : 



San I. nib Potosl, Mexico . 

 do 



Mm.. 

 110 



105 

 104 

 87 

 108 

 116 

 95 

 99 

 105 

 103 



Adult: Length 643'" 

 hind foot, 138. 



I Adult : Length 592°' 

 I hind foot, 136. 



I Adult:* Length 598""" 

 ( hind foot, 150""". 



One-third grown (?). 



I Adult: Length 590"'"'; 



46 / hind foot, 130. 

 109 



. Unborn (?). 



.! Do. 



. 1 Few days old. 



295 



240 

 185 

 260 i 



51 j 

 100 1 



88 

 102 

 109 



84 I 



77 



65 1 



43 



Adult: Length 

 hind foot, 145. 



One-third g^o^yn (/)• 



*In Merriani collection. tin American MnBentn of Natural History, New York. 



; Average of 6 specimens from Wyoming. 



It would liave been desirable to have a iiinch larger number of si)eci- 

 mons, but the localities and seasons are well di.stiibuted and com- 

 pensate in a measure for the small series. The earliest date of birth 

 indicated in these tables is about the beginning of January in the case 

 of three specimens — one taken in Panamint Valley, in the desert region 

 of southern California, the others in southern Texas, at San Antonio 

 and Matagorda. The latest dates (September), are represented by speci- 

 mens from San Franci.sco Mountain, Ari/,.; Santa Ko.salia, Chihuahua, 

 and Kockport and San Antonio, Tex. Between these extremes every 

 month is represented, but most of the young seem to be born in April, 

 May, and June. Specimens born after the 1st of July are from the 

 northern part of the Plains, from the (Ireat Basin, from southern Texas, 

 from elevated regions, or from the table-land of Mexico. There is a 

 noticeable absence of data from the low deserts of southern Arizona 

 and southern California, ai)parently intlicating at least a partial i>eriod 

 of rest during the hot, dry summer. The tables also fail to show that 



