﻿June, 1896.] SYNOPSIS OF THE WEAbELS OE NORTH AMERICA. 17 



Color. — Summer pelcujc: Upi:)er parts, iiicludiiig fore and liiiid. feet 

 and anal region, and often encroaching irregularly on belly, rich dark 

 -chocolate brown, sometimes suggesting seal brown ; under ])arts (usually 

 including upper lip) white, more or less washed with yellowish; no 

 yellow on under side of tail or on hind feet, the color of under parts 

 stopping short of ankle. Winier pelage: In southern part of range 

 similar to summer i)elage, but ui)per parts paler, nearly drab brown. 

 Northern specimens wiiite all over except termnial third of tail, which 



is jet black; throat, bellj^ posterior 



half of back and tail always sulfused 

 with yellowish. 



Cranial characters. — Skull of male 

 large, heavy, and elongate; sagittal 

 ridge present in adults; postorbital 

 processes and constriction mod- 



eratelv developed; zvgomata not 



Fig. 4. — P^itorius novchoi-acensis (S nA. Adiron- J" / c 



(lacks, New York. 00 iccd 0 lit icard : audital bullre rather 



narrowly oval, usually rounded an- 

 teriorly as well as posteriorly. Skull of female very small, light, and 

 narrow, with braiji case elongate and subcylindric, much as in cicognani; 

 audital bulhe small, narrow, and not rising abrux)tly anteriorly from 

 inflated squamosals, which latter ai-e elongated and stronglj^ inflated as 

 in clcognajii. Skulls of males may be distinguished from those of male 

 longicauda by shorter postorbital processes, less marked postorbital 

 constriction, less triaugular brain case, lower sagittal ridge, very much 

 narrower zygomata, which are not bowed out irard^ narrower i:)alate, and 

 narrower audital bulhe, which are more rounded anteriorly. The resem- 

 blance to F. HKisliingtoni is very much closer, but male skulls of novebo- 



YlGS. 5 and G. — Futvrms norehoracenais. Adirondacks, iSTew York. 



racensU may be distinguished by larger size and much larger audital 

 bullae. The lemale skull, owning to the inflation of its squamosals 

 inferiorly, needs no comparison with either ivasMngtoni or longicauda^ 

 but is with difficulty separated from cicognani in regions where the two 

 species overlap. The postorbital processes are longer and the car- 

 nassial and sectorial teeth larger in the females of noveboracensis than 

 in cicognani from the same localities. 



Remarl<s. — Ptitorins novehoracensls may usuall}^ be distinguished from 

 .P. cicognani by larger size and also by the longer and more bush;)^ tailj 

 16932— No, 11-— 2 



