412 
U. S&S. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT, 
List of specimens. 
—-, 
= | Measurements. 
ia 
ae : 3{ [slalela 
g é|e Locality. When col-| Whence and how 2 Nature of| , = 2 % a ze < | . |Collected by— 
=| eo. Ep lected. obtained. = |specimen. ale 3 Fhe ie Sp | a Ey = 
AE : elele/2|= (ele | i=|= 
5 |o |a ° 2/2 /4/42 |e(/8 |e | |a/a 
1921: |,...|'|Platte river...... ss. Sep. 15,1856 Lt. F. T. Bryan.......| 336/Alcohol.,.| .80/1.40 1.50 3.50 4.65 5.05 +50)1.51) 4.05) e0e./W. S. Wood.. 
4422 |1307| .. |Huerfano river, N. M.. 1853 Capt. E.G. Beckwith.|..../Skin...... seesleccelocee ealersclesks eeee/eees/].48) .98)/Mr.Kreutzfeldt 
4904 1631) .. |Near Ft. Massachusetts 1853 coeeesdOv,ccees evcees 11}, .do..... 1 75,4.505.256 33) 50) wees odes weeeee 
491* 1632) .. |Llano Estaeado, (west- 1854 Capt. J. Pope. ........[ee0+|..0.. 4. 4,455.25. 1,50)1.43 se neascececces 
ern part.) 
492+ |1633) ..|...... dO... weveseeeves 1854 Seveee Ors odvecvecisiecs| ovielseDQescene seeeleeeeleeee/4,33.4,505.37) .40/1.50].. Sreerrrrrrr rr 
534s Cal petsysdO.tecvens ence gs| 0 1G540 | venses GO; veseceaoysceelonea| sees pone ce| corel eect] oeee ae13 Ac 60 eee | lca naan ad ees 38 sie 
1739* . |Recos river, N. M,....|May 27,1856 ...... do...... sere bees| 141.00. . we Ts 
1741? |... voccesdOrecveseevenece June 24,1856)...... soveweel| (COs omen cs HL. 
W74Q® | eee} ve leoeees do... eee +. (July 12,1856) 20.0. dO.. weevee eeeeee 204]. .d0...00. eal. 
613" 1764) .. |Western Texas....... 1854 cece sGOrssevessceceee|soes |e edOr.eees 
2675+ +. /Waco Tanks, N.M.... Mar.13, 1856) ceeeee O.. seecccceeece|oese|eeGOre vee Seine |sinenll ware 
533" -. {Organ mountains,N.M.)..... eeceeee|Dr. T. H. WebD oeceeelecee/eeGO.0..00 -90)..../1.50 
531+ . |Fort Thorn, N. M oo (Dr. T. C. Henry eececs|ooee|esdOo. aves 
SBD" | caa} os levsvecOsecececs vovccsleccesevvcnesleosnes Os. wnweee coerce sede |e sOvecnss wecvlecesies ccvloces 
560? 1066) .. JE] Paso, Texas......../eeeeeseeeees \Col. J. D. Graham ....).000/..dO.. sees seeslecceleceelevee|seeeleceeleveelooes(1.39) .91/Chas. Wright. 
1044* 2209 -. [Mesilla Valley.......- 1855 Maj. W. H. Emory....|....|Mounted .|cees|eeee|eees|seeslerss|eeeleeee|seee (1.44 .95/Dr. Kennerly.. 
143" 1125) .. Santa Cruz, Sonora...|....++eeeees Col. J.D. Graham.....},.../Skin...... 4,25 .|1.46)1.47| .97\J. H. Clark.... 
372? 1286) © |Durango, Mexico... |Dr. T. H. Webb ....../+++. Mounted .|....)...-Jeeerloees seceleeeslecee|teeeleeeeleecslececeeeneecnes 
2621+ «| +» (Coahuila, Mexico® ....}eececevseees Lt. D. N, Couch ,.... eee. (In ale....| .90/1.40)1.604.005.30.5.95) .55/1.46]....].00s|eecee. eneveces 
Above yellowish brown. 
1 Light yellowish red: D. ordii. 
2 More dusky: D. montanus. 
3 Dusky; white tip to the tail; type of Dipodomys montanus. 
4 Rather dusky; tail dusky at the end. 
6 Probably near Santa Catarina. 
DIPODOMYS PHILLIPII, Gray. 
Dipodomys phillip, Gray, Annals and Mag. Nat. Hist. VII, 1840, 621.—In. Sill. Am. J. Se. XLII, 1842, 335. 
(Real del Monte.) 
Waaner, Suppl. Schreb. III, 1843, 295. 
Leconte, Pr. A. N. Sc. VI, 1853, 224. (San Diego.) ‘ 
Dipodomys phillippsii, Aup. & Bacu. N. Am. Quad. JI, 1853, 137; pl. cxxx. (The figure derived from Gray’s 
specimen ; description uncertain.) 
? Macrocolus halticus, Wacner, Wiegm. Archiv, 1846, 1, 172.—In. Abhandl. K. Baier. Akad. XXII, 1845, 319. 
GiepeL, Saugt. 1855, 599. 
Tail very long, much exceeding the body ; the upper caudal dusky 
stripe extending to the tip, although the hairs here are only dusky at their extremities, the 
principal portion being white; in some specimens entirely white, the lower stripe becoming 
obsolete near the tip. 
Two specimens of what I refer to this species were caught at Posa creek by Dr. Heermann and 
preserved. They are in the state of moult or change of hair, and it is consequently impossible 
to describe accurately their color. 
The essential conditions of the species appear to consist in a 
thin tail, much longer than the body, the hairs quite close pressed till on the terminal third, 
when they gradually elongate on the upper side to the tip, where they measure an inch in 
length. They elongate somewhat on the under side near the tip, but do not stand out in a 
crest as on the upper. 
