120 Merriam Four Ne-ic Peccaries from Mexico. 



tujacu group, and (b) the albirostris group. In both groups the 



male is larger than the female and has larger teeth. In some 



\^ forms the sexual disparity in size is small; in others it is great. 



The Peccaries of the tajacu group inhabiting Mexico and the 



United States appear to break up into forms, as follows: 



Tfn/assii- imgulatns (Cope) Texas and northeastern Mexico. 

 anyulatns sonoriensis (Mearns). Southern Arizona and 



Sonora. 



angidatns hum&ruMs nob. Colima to Tehuantepec. 

 <ni(/tfl<ttnit crassxx nob. Metlaltoyuca, Puebla (and Hue- 



huetan, Chiapas). 



fingnlatus yuccttcwwnsis nob. Yucatan. 

 IKUIHX Merriam.* (A dwarf insular species) Cozumel 



Island. 



In comparing skulls of the tajacu-atigulatm series with those 

 of the afbirostrit* series, such striking and important differences 

 appear that it seems necessary to recognize the two groups as 

 constituting separate subgenera. Indeed J. E. Gray, in 1868, 

 separated them as full genera, restricting Cuvier's generic name 

 Dicotyles to labicttus (^dlbirostris) and adopting Fischer's name 

 Nbtophortts for the Collared Peccary. (Proc. Zool. Soc. Lon 

 don, 1868, pp. 21, 43-45.) 



But these names (X)icotyles and NotophoriiS) both proposed in 

 1817) arc pure synonyms of Tay<m$n- 1814, and cannot there 

 fore l>e restricted to either of the two original species, both 

 having been included by Fischer in the original diagnosis of 

 his genus <tyasnH. This leaves the albirostris group without 

 a name. To supply the deficiency I propose to call it Oliilnsus. 



Submenus OHdosusf nob. 



External characters. Size larg;e; seta' over posterior part of eyes very 

 large and long, reaching back nearly to tip of ears; occiput and neck 

 bearing a mane of long flat black bristles which in passing backward 

 become greatly elongated (lose their points and become frayed at tips), 

 spread out laterally overlying the short annulated bristles of sides of 



*See antea, p. 102. 

 fOlidus, stinking; sus, hog. 



