28 



JACK RABBITS OF THE UNITED STATES. 



between these measurements and those of any particular specimen 

 with the difference obtained by subtracting- the oaeasurements of the 

 young from those of the adult of that species. 



• List of young Jack Babhits, shoiving time of hirth. 



Spscies. 



Lepiis alleni 



Lepus calif orniens . 



Do 



Do 



Do 



Do 



Lepus campestris . . 



Do 



Do* 



Do'^ 



Do* 



Lepiis melanotisi . 



Do* 



Dot 



Dot 



Do 



Do 



Do 



Dot 



Dot 



Dot 



Lepvs texianus . . . 



Do 



Do 



Date. 



June 12, 1892 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Do 



Lepus sp (?) 



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, 

 Apr. 26, 

 July 3ll, 

 Sept. 3, 

 Sept. 17, 

 Sept. 17, 

 Oct. 11, 

 Jan. 10. 

 Mar. 27, 

 Apr. 10, 

 Apr. 27, 

 Mav 9, 

 May 18, 

 May 22, 

 June 11, 

 July 17, 

 July 26, 

 Sept. 21, 

 Jan. 23, 

 Sept. 30, 

 Aug..l4, 

 do . 



1892 

 1894 

 1894 

 1894 

 1894 

 1894 

 1894 

 1888 



1887 

 1891 



1894 

 1892 

 1890 



1891 

 1891 

 1891 

 1892 

 1891 

 1889 

 1889 

 1891 

 1894 

 1890 

 1893 

 1892 

 1W3 

 1892 



Locality. 



Total |Hind 

 lenjjth. foot. 



Rillito Creek, Arizona . . 



San Fernando, Cal 



Jackson, Cal 



Oakdale, Cal 



Chinese Camp, Cal 



Priest Valley, Cal 



Newcastle, Wyo 



do 



Fort Pierre, S. Dak 



do 



FortBulord, N. Dak.... 



San Antonio, Tex 



Onaga, Kans 



Sau Antonio, Te.x 



....do 



Vernon, Tex 



Cairo, Kans 



Onaga, Kans 



San Antonio, Tex 



do 



do 



Panamint Valley, Cal . . . 

 Grapevine Mountains, Nev 



Furnace Creek, t'al 



Fort Huacbnca, Ariz 



Beaverdam, Ariz 



Phfenix, Ariz 



Carson, Nev 



Lone Pine. Cal 



South Fork, Pitt River, Cal 



Arco, Idaho 



Santa Rosalia, Chihuahua 



Mat.Tgorda, Tex 



Rockport, Tex 



San Luis Potosi, Mexico . 

 do 



Mm. 

 455 



375 

 405 

 390 

 420 

 410 

 344 

 350 

 460 

 445 

 265 



266 



206 

 405 



192 

 379 

 200 

 380 

 300 

 410 



295 



281 

 240 

 185 

 260 



Mm. 

 110 



105 



104 



87 



108 



116 



95 



99 



105 



103 



195 

 198 



Remarks. 



47 



98 



51 



100 



88 



102 



109 



84 



77 



65 



43 



80 



48 

 48 



73 



46 

 109 



Adult: Length 643""" ; 

 hind foot, 138. 



Adult: Length 592"""; 

 ^ bind foot, 136. 



Adult:: Length SgS"""; 

 [ bind foot, 150"™. 



One-third grown (?). 



I Adult: Length 590™; 

 hind foot, 130. 



Unborn (?). 



Do. 

 Few days old. 



Adult: Length 647'°"'; 

 bind foot, 145. 



One-third grown (?). 



*In Merriam collection. tin American Museum of Natural History, New York. 



i Average of 6 specimens from Wyoming. 



It would have been desirable to have a much larger number of speci- 

 mens, but the localities and seasons are well distributed 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 Francisco Mountain, Ariz.; Santa Rosalia, Chihuahua, 

 and Roctport 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 I'lains, from the Great Basin, from southern Texas, 

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

 noticeable absence of d.ata from the low deserts of southern Arizona 

 and southern California, ai)parently indicating at least a partial period 

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



