1902.] NATURAL SCIENCES OF PHILADELPHIA. 459 



Canada Rockies by a race of americana. Geogra])hic counectiou 

 with caurina problematical. 



Description of Subsjjecies. — Strikingly different from all other 

 xlmerican martens except caurina in the absence of Ihe light- 

 colored cheek patches. Head relatively darker, as compared with 

 upper body colors, than in caurina ; ears lacking a white border or 

 inner lining cf white hairs. Gular and pectoral patch extensive, 

 wide, connected by interrupted streaks along median abdominal line 

 with well-defined narrow pre ventral area of similar color. Color of 

 gular patch a peculiar buffy-orauge, as iu caurina, lightening some- 

 what at armpits. Entire upper parts, including head, ears, legs 

 and sides, and lightening somewhat on belly, " wood-brown," the 

 longer, darker hairs of middle back and rump being " broccoli- 

 brown," and the brush of tail and soles of feet " clove-brown." 

 Ears edged with ochraceous-buff. Tail relatively long, as in 

 caurina. The concolor a])pearance of origenes viewed from above 

 is even more striking than iu caurina, the whole of head, excepting 

 the ear-margins, being quite as dark as the neck and shoulders and 

 these not noticeably darker than the back. The under parts show 

 precisely the same color and pattern characters which distinguish 

 caurina from aviericana. Indeed, it was these, together with the 

 charactei-s of the skull, which upset my previous ideas (based on 

 geographic reasons) that origenes was a race of americana. For- 

 tunately there are five skins and three skulls of Colorado martens 

 at hand, and these all show with remarkable uniformity the con- 

 stancy of the characters of type as above given. It is to be 

 regretted that no skin with skull of an adult male is available. 

 An adult male skin, topotype, also collected by Mr. Setou the last 

 of August, and a female collected on the Great Divide in Boulder 

 county, fit the above description exactly. The skull of two 

 females, one from Boulder county, the other the type, are not 

 enough matured to give the maximum measurements, but the skull 

 of an old adult female from North Park furnishes these, showing 

 origenes to be of the same size and proportions as caurina of the 

 same sex. Coming to an examination of the teeth our surmises, 

 based on external characters, are so completely verified that any 

 zoogeographic preconceptions we may have had as to afiinity of 

 origenes with americana : re swept away. The peculiar saddle- 

 shaped upper posterior grinder of origenes, with its widely flaring 



