In subspecific diagnoses in this report, color and size, and sometimes relative size, are the characters usually mentioned.
Duellman and Wellman (1960:25) discussed these specimens in relation to their subspecific assignment.
subspecific assignments have been made only when there is evidence of intergradation.
Nevertheless geographic variations of subspecific worth have not taken place.
In my opinion, the use of subspecific nomenclature is justified in this case, although not completely unambiguous.
A more adequate series of adults of aztecus is needed to clarify even the subspecific differences between aztecus and modestus.
The subspecific status of the bighorns in the San Gabriel Mountains has not been definitely determined.
The subspecific identification is on geographic grounds, and is tentative.
The subspecific name is derived from the Latin infucatus, meaning painted, in allusion to the red colors on the limbs and webs.
The subspecific identity of beavers from Utah seems never to have been carefully investigated.