LEPORIDA—BIBLIOGRAPHICAL RESUME. - 281 
(2) Hydrolagus palustris (= LZ. palustris), to which he properly refers his Z. Douglassi var. 2; 
(3) Sylvilagus nanus (= L. sylvaticus) ; (4) Sylvilagus Artemisia and (5) Sylvilagus Bachmanni 
[sic] (4 and 5= ZL. sylvaticus var. Nuttalli); (6) Lepus areticus (= L. timidus var. arcticus) ; (7) 
Lepus americanus ; (8) Lepus Washingtoni (=L. americanus var. Washingtoni) ; (9) Lepus cam- 
pestris ; (10) Lepus caltotis [sic], including the synonyms usually referred to L. callotis ; (11) 
Lepus californicus (properly including his own L. Bennetti with its other synonyms) ; (12) ?L. 
longicaudatus, “ Magellan’s Straits”, although he previously refers “ L. longicaudatus Gray” to 
L. saxatilis(!); (13) Tapeti brasiliensis, Under Cuniculus fodiens (= Lepus cuniculus Linn.), 
he properly places the “ L. magellanicus Less.”, based on feral specimens of this species from 
the Falkland Islands. 
31868.—Abbott, Cook’s Geol. of New Jersey, 759. L. sylvaticus in New Jersey. 
1868.—Cooper, Amer. Nat., ii, 536. Notes on the habits and distribution of Z. Townsendi (= L. cam- 
pestris) and L. “ artemisia”. 
1868.—Brown, Proc. Zodl. Soc. Lond., 1868, 351. Notes on L. americanus. 
1869.—Allen, Proc. Bost. Soc. Nat. Hist., xiii, 194. L. sylvaticus in Iowa. 
1869.—Allen, Bull. Mus. Comp. Zodl., i, 239. Sylvilagus nanus (=L. sylvaticus) in Massachusetts. 
1869.—Cooper, Amer. Nat., iii, 470. Distribution of Z. callotis and L. californicus in the Colorado 
Valley. 
1869.—Coues, Proce. Bost. Soc. Nat. Hist., xiii, 86. Biographical account of L. palustris. 
1869.—Frantzius, Wiegm. Arch., 1869, i, 226. JL. brasiliensis in Costa Rica. 
1869.—Hayden, Amer. Nat., iii, 115. Lepus Bairdii (= L. americanus var. Bairdii) described. 
1869.—Welch, Proe. Zodl. Soc. Lond., 1869, 228. Seasonal changes of color in L. americanus. 
ES7.—Allen, Bull. Mus. Comp. Zoél., ii, 184. ZL. sylvaticus and L. palustris in Florida. 
1872.—Gilpin, Proc. and Trans. Nov. Sco. Inst. Nat. Sci., iii, 46. Notice of L. americanus. 
1872.—Hensel, Abhandl. d. phys. Klasse d. kénig]. Akad. d. Wissensch. zu Berlin, 1872, 62. L. bra- 
siliensis in Southern Brazil. 
3873.—Lincecum, Amer. Nat., 771. Distribution and habits of L. aquaticus. 
1873.—Merziam, Hayden’s U. S. Geol. Survey, 6th Ann. Rep., 666-668. “LZ. callotis?” (=L. campestris), 
collected at Ogden, Utah, and a biographical notice of L.  Bairdii”. 
1874.—Allen, Bull. Essex Inst., vi, 52, 58, 61, 66. Notes on the distribution of L. callotis, L. campestris, 
L. sylvaticus var. “ artemisia”, and L. americanus var. Bairdii. 
1875.—Allen, Proc. Bost. Soc. Nat. Hist., xvii, 480-436. A general synopsis of the American Leporida, 
with an analysis of the species and varieties, based on the collections of the Smithsonian 
Institution and the Museum of Comparative Zodlogy. Three primary divisions of the genus 
Lepus are recognized, with two subordinate divisions under each. The specific and sub- 
specific characters are briefly indicated, together with the principal synonyms and the geo- 
graphical distribution of each variety. The species and varieties recognized are as follows:— 
(1) L. timidus var. arcticus ; (2) L. campestris ; (3) L. americanus, with varieties (a) americanus, 
(b) virginianus, (c) Washingtoni, (d) Bairdii ; (4) Lepus sylvaticus, with varieties (a) sylvaticus, 
(b) Nuttalli, (c) Auduboni ; (5) L. Trowbridget ; (6) L. brasiliensis ; (7) L. callotis ; (8) L. cali- 
fornicus ; (9) L. palustris. No really new form is here added, and only one of those given by 
Baird in 1857 (L. Bachmani) is canceled. The two additions made to those given by Baird 
are the L. Bairdii described by Dr. Hayden in 1869, and a variety through the division of 
the L. americanus of Baird’s work into two varieties. The chief difference between the 
results here reached and those given by Baird consists in the reduction of several of the 
formerly so-called species to subspecies, in consequence of the increased amount of material 
at command having shown them to be intergrading forms. 
V.- -CHARACTERISTICS OF THE FAMILY AND SYNOPSIS OF THE SPECIES AND 
VARIETIES. 
Excluding the genus Lagomys, formerly associated with the Hares, but 
of late very properly regarded as the type of a distinct family, the Leporide 
constitute one of the most natural and best-defined groups among mammals. 
The Lagomyide are decidedly their nearest allies, but differ in important 
