10 NORTH AMERICAN FAUNA. 



Jaculus Erxleben, Syst. Nat., p. 404, 1777. A genus of Old World 

 jerboas. The name was first used for North American species by 

 Wagler (Nat. Syst. Amphibien, p. 23, 1830). 



Zapus Coues, Bull. U. S. Geol. Surv. Terr., I, 2d ser., No. 5, p. 253, 

 1875. The first tenable generic name based on a North American 

 Jumping Mouse. 



SPECIFIC AND SUBSPEC1FIC NAMES. 



Acadicus (Meriones) Dawson, Edinburgh New Philos. Journ., new 

 series, III, p. 2, 1856. Dawson, after unmistakably referring the animal 

 since described as Zapus insignis to the Meriones labradorius of Richard- 

 sou's Fauna Boreali- Americana (i. e., Z. hudsonius), goes on to describe 

 Z. hudsonius from Nova Scotia, calling it provisionally Meriones acadicus. 



Alascensis (Zapus) Merriam, Proc. Biol. Soc. Wash., XI, p. 223, July 

 15, 1897. Dr. C. Hart Merriam has described a subspecies of Z. hud- 

 sonius under this name, from specimens collected at Yakutat Bay, 

 Alaska. 



Alleni (Zapus) Elliot, Field Columbian Mus., Pub. 27, Zool. Ser., I, 

 No. 10, pp. 212-213, March,. 1898. Under this name Mr. D. O. Elliot 

 described the form of Zapus inhabiting the Sierra Nevada in California. 



Americanus (Dipus) Barton, Trans. Am. Philos. Soc., IV, No. XII, 

 p. 115, 1799. Under this name Benjamin Smith Barton described 

 specimens from the vicinity of Philadelphia, Pa. Later (ibid, VI, 

 1804) he discussed the habit of hibernation and presented a figure of 

 the animal. Mr. C. F. Batchelder has recently revived americanus for 

 the form of Z. hudsonius inhabiting the Upper Austral zone in the 

 Eastern States. (Proc. New Eng. Zool. Club, I, p. 6, 1899.) 



Brachyurus (Gerbillus) ' Rafinesque.' A name referred to by Fischer 

 (Syn. Mainm., p. 340, 1829) without reference, and included in the syn- 

 onomy of Zapus by Coues (Mon. N. Am. Rodentia, p. 468, 1877). I have 

 been unable to find the original reference, but the inapplicability of the 

 name is self-evident. 



Canadensis (Dipus) Davies, Trans. Linn. Soc. London, IV, p. 157, 

 1798. Maj. Gen. Thomas Davies described specimens which he had 

 procured in the vicinity of Quebec, Canada. He undoubtedly referred 

 to an animal of the hudsonius type, and as specimens from that region 

 do not deserve separation fiom the typical form, the name becomes a 

 synonym of hudsonius. 



Daviesii (Gerbillus) Rafinesque, ' Precis des Decouv. somiologiques, 

 p. 14, 1814.' Rafinesque is said to have renamed Dipus canadensis after 

 its describer. 



Hardyi (Zapus) Batchelder, Proc. New. Eug. Zool. Club, I, p. 5, 

 February 8, 1899. Mr. C. F. Batchelder has recently applied this name 

 to specimens from Mount Desert Island, Maine. From a careful study 

 of the material at present accessible, I can find no characters of impor- 

 tance to separate this form from hudsonius as here restricted. 



