PEROGNATHUS. 357 
toid side of parietal not longest; audital bullae separated anteriorly 
by full width or nearly full width of basisphenoid.”’ 
KEY TO THE SPECIES AND SUBSPECIES OF THE SUBGENUS. 
A. Rump without bristles. 
a. Size small; total length, 136 mm. 
a.’ Above buffy drab and black....: ote P. p. arenarius 358 
b. Size medium; total length, 159-191 mm. 
a.’ Above vinaceous buff and black. 
PAGE 
an Hind fOOtmaetdos ci... vs. P. p. angustirostris 358 
pe blind LOR es ls... P. p. prictt 358 
b.’ Above whitish drab, tinged with fawn...P. p. eremicus 359 
x al Son MM seen h adie 0S i) ke | a Ue P. permx 359 
da wabove broceolemrowilina..)....... oes P. p. rostratus 359 
e.’ Above mixed dark buff and black........... P. hellert 360 
c. Size large; total length, 208-242 mm. 
a.’ Above cinnamon and brownish black......P. hispidus 360 
We eebOVE QUVERCOmmnatie. 6... x blaine P. h. zacatecas 361 
ce.’ Above yellowish brown and black.....P. h. paradoxus 361 
ad, Above drab brown and black.............. P. baileyi 361 
e.’. Above pale buff and black.......... P. b. rhydinohris 362 
f.’ Above ochraceous buff and black........... P. cnecus 362 
B. Rump with bristles. 
a. Size large. 
a.’ Pelage very coarse, bristly. 
a.’ Mastoids very small. 
a.’/’’ Above pale fawn and black....... P. margarite 363 
b.’” Mastoids moderate. 
a.’/’’ Above dark gray, lined with black. 
A OME TOMI,.. . . ee G+ OMe P. spinatus 363 
jon A Sv ish oak salen ho P.s. peninsule 363 
Ce nae RATA. . > sree ss oe me P.s. bryantt 364 
b.’ Pelage moderately coarse, not bristly. 
a.’ Above drab gray, lined with black. ..P. intermedius 364 
Ey OVER MEIL COW May. br. os iate ees +a sede P. nelsont 364 
ge Tatangelo ote (2) ee oe P. n. canescens 365 
d.’’ Above broccoli brown and black. 
dG. samp Diistles PLOMUINENGIn. .54..... P. goldmant 365 
Db “sump oristies undeveloped. .o0. ....5 50. Arius 9308 
e.” Above dark grizzled yellowish brown 
aol 1) el RU at eR P. fallax 9366 
f.’ Above pale broccoli brown, slightly 
(meremewwit Olde... Lees eee. P. f. pallidus 366 
