lO SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 56 



General characters. — Size about as in desmarestianus, but color 

 darker, the slender hairs paler and less conspicuous among the 

 bristles over dorsum; lateral line absent; white of under parts con- 

 tinuous along inner side of hind leg to foot ; skull massive ; maxil- 

 lary root of zygomata broad and heavy ; interparietal rather narrov^, 

 with a well-developed anterior angle, and a small posterior median 

 notch. 



Color. — Upper parts blackish, becoming dark mouse gray along 

 flanks and outer sides of limbs, the slender hairs inconspicuous 

 among the black-tipped bristles ; under parts, feet, and a line down 

 inner side of hind leg to metatarsus, white ; tail blackish or brown- 

 ish above, whitish below, except at base where it is dark all round 

 as usual in the group. 



Skull. — Similar to that of desmarestianus, but interparietal with 

 a more prominent anterior angle, and a posterior median notch (the 

 latter absent in desmarestianus) ; parietals less extended laterally 

 across temporal ridges ; dentition about the same. 



Measurements. — Type: Total length, 263 mm. ; tail vertebrae, 134; 

 hind foot, 35. Skull (type) : Greatest length, 37 ; zygomatic breadth, 

 17; interorbital breadth, 10; nasals, 15.2; width of braincase, 15.2; 

 interparietal, 8.2 x 5 ; maxillary toothrow, 5.5. 



i?^mar^^.— Although so widely separated geographically this spe- 

 cies seems more like typical desmarestianus of Guatemala than like 

 its near neighbors in Panama. It lives at low elevations on rocky 

 heavily forested hills in the northern end of the Canal Zone. 



Specimens examined. — Four, all from the vicinity of the type 

 locality. 



HOPLOMYS GOETHALSI,' sp. nov. 



Type from Rio Indio, near Gatun, Canal Zone, Panama. No. 

 170972, voung female, U. S. National Museum (Biological Survey 

 Collection), collected by E. A. Goldman, February 16, 191 1. Origi- 

 nal number 20888. 



General characters. — In size and color similar to truei and gym- 

 niirus; skull with heavier zygomata than either, the jugal decidedly 

 broader, with inferior border projecting posteriorly in a well defined 

 hook (absent in truei and gymnurus) . 



"■ Named in honor of Col. George W. Goethals, U. S. Army, Chairman and 

 Chief Engineer of the Isthmian Canal Commission, whose courtesy and 

 assistance have contributed so much to the success of the Smithsonian 

 Biological Survey of the Panama Canal Zone. 



