280 MONOGRAPHS OF NORTH AMERICAN RODENTIA. 



1857. — Baird, Mam. N. Amer., 572-617. L. glacialis, = L. timidui var. arcticus : I., americanus ; L. 

 fFashingtoni, /.. americanus var. Washingtoni; I., campestris; L. callotis ; L. calif ornicus ; 

 L. sylvaticus, = /.. sylvaticus var. sylvaticus ; I., artemisia and /.. Bachmani, — L. sylvaticus var. 

 Nuttalli; L. Auduboni (here first described), = £. 8y?!>a(?cus var. Auduboni; L. Trowbridgei; 

 L.aquaticua; L. pulustris. Thirteen species am here recognized, which in this monograph 

 arc regarded as representing eight valid species and tour valid varieties, one name only 

 ([.. Bachmani) being here reduced to a synonym. L. flavigularis Wagner and L. tcsianns 

 Waterhouse are doubtfully referred to L. callotis; L. texianus Audabon and Bacbnian is 

 regarded as a species probably distinct from the /-. texianus Waterhouse, but is mentioned 

 as a species which his materials did not allow him "to discuss or describe". L. Nuttalli is 

 doubtfully referred to L. artemisia. Ho states that be strongly suspects the specimen on 

 which L. Nuttalli was based to be an immature example of /.. artemisia, and points out the 

 fact that, in case it proves to be so, the name Nuttalli must take precedence over artemisia. 

 The L. cunicularius of Lichtenstein (Waterhouse), based on Mexican specimens, he properly 

 suggests may prove to be L. aquations, as is undoubtedly the case. No mention is made of 

 the L. lunyieaudalns of former authors, which Waterhouse had previously shown was African, 

 and not referable to any American species. The synonymy of the subject is judiciously and 

 exhaustively treated, and in no case do any of the collocations seem to require changing. 

 Furthermore, in this monographic essay, the species are for the first time subgenerieally 

 divided ; no names are, however, affixed to his very natural subdivisions, which are very prop- 

 erly treated as merely sections rather than as groups of a technically subgeneric value. Baird's 

 treatment of the subject forms as great an advance over our previous knowledge of the 

 group as did Bachmau's articles twenty years before, and marks a second grand epoch in the 

 literature of the North American Leporida-. Finally, Baird's work thus far greatly surpasses 

 in accuracy and thoroughness any treatment of the Leporida: of any part of the world. 



1857. — Newberry and Baird, Zoiil. of Lieut. Williamson's Kep. upon Expl. for a R. R. Route from the 

 Sacramento Valley to the Columbia River (Pacific R. R. Expl. and Surveys, etc., vi, pt. iv, 

 no. 2, pp. 62-C5). Field-notes by Dr. Newberry; identifications by Professor Baird; 

 synonymy and diagnoses from Baird's Gen. Rep. Mam. N. Amer. The species mentioned are 

 L. campestris, L. californicus, L. "artemisia", L. " Auduboni", and L. Trowbridgei. 



1 §59. —Baird, Zoiil. U. S. and Mex. Bound. Survey, 45-48. L. callotis (described in detail), and L. 

 californicus, L. sylvaticus, L. artemisia, and L. Bachmani (the two latter ^= L. sylvaticus var. 

 Nuttalli) mentioned by name merely, with field-notes by the collectors. 



1 859.— Kennedy, Zoiil. of Lieut. Whipple's Route, near the 35th Parallel (Pacific R. R. Expl. and 

 Surveys, etc., x, pt. vi, no. 2, 16, IT). Field-notes by Dr. Kenuerly, with diagnoses extracted 

 from Professor Baird's Gen. Rep. Mam. N. Amer. The following species are mentioned : — 

 L. callotis, L. "artemisia", L. "Auduboni", and L. Trowbridgei. 



I860. — Cooper, Zoiil. of Gov. Stevens's Route near the 47th and 49th Parallels (Pacific R. R. Reps, 

 xii, pt. iii, no. 2, 87). Field-notes and measurements by Dr. Cooper, with diagnoses of the 

 species from Baird's Gen. Rep. Mam. N. Amer. The species mentioned are L. " Washinytoni", 

 and L. Trowbridgei,. 



I860.— Suckley, Ibid., pp. 103-105. Field-notes by Dr. Suckley and diagnoses from Baird's Gen. Rep. 

 Mam. N. Amer. The species enumerated are L. " Washingtoni", L. campestris, L. californicus, 

 " ? L. callotis " (= L. callotis), and L. " artemisia ". 



I860.— Suckley and Gibbs, Ibid., pp. 130-133. Chiefly field-notes on L. " Washinytoni", L. campestris, 

 " ? L. callotis" (= L. callotis), L. californicus, and L. artemisia. 



1861.— Maximilian, Wiegm. Arch., 18<il, i, 142-145. Habits and distribution of L. americanus, L. syl- 

 vaticus, and L. campestris. 



1861.— Ross, Canad. Nat. and Geo!., vi, 436. Notice of L. americanus. 



1862.— Hayden, Trans. Amer. Pbilos. Soc. Phila., xii, 148. Notes on L. campestris, L. sylvaticus, and 

 L. " artemisia ". 



1867.— Coues, Amer. Nat., i, 531-535; Proc. Acad. Nat. Sci. Phila., 36. Habits and distribution of L. 

 callotis and L. "artemisia" in Arizona. 



1867.— Gray, Ann. and Mag. Nat. Hist.. 3d ser., xx, 221-225. Divides the genus Lcpus into seven so- 

 called genera, raising several of Baird's sections (see Mam. N. Amer., 574, 575) to generic 

 rank. His seven genera arc (I ) Bydrolagus ( = Baird's section F), (2) Sylvilagus (= Baird's 

 section D), (3) Eulagos, (4) Lcpus (= Baird's sections A and E), (5) Tapeti, (6) funiculus 

 (= Baird's section C), and (7) Caprolagus. The American species recoguized are as follows: — 

 (1) Hydrolagus aquaticus {== C. aquaticus), to which he properly refers his L. Duuylassi var. 1 ; 



