104 BULLETIN 18 7, UNITED STATES NATIONAL MUSEUM 

 KEY TO MEXICAN FORMS OF PHYLLORHYNCHUS " 



1. Dorsal blotches on body less than 17 browni browni 



Dorsal blotches on body 17 or more 2 



2. Males with 168 or more ventrals, females with 179 or more; 



body blotches usually distinctly narrower (along body) than inter- 

 spaces decurtatus perkinsi 



Males with 167 or fewer ventrals, females with 178 or less ; body 

 blotches usually equal to or wider (along body) than interspaces 3 



3. Dorsal blotches on body 34 or less; males without conspicuous keels 



on dorsal scales decurtatus decurtatus 



Dorsal blotches on body 35 or more; males with conspicuous keels on 

 dorsal scales decurtatus nubilis 



♦PHYLLORHYNCHUS BROWNI BROWNI Stejneger ^^ 



Phyllorhynchtis hrovmi Stejnegeb, Proc. U. S. Nat. Mus., vol. 13, 1890, p. 52. — 

 Klaubek, Bull. San Diego Soc. Nat. Hist., No. 12, 1935, p. 17, fig. 3, map. 



Phyllorhynclius browni broicmi KLAUBE2t, Trans. San Diego Soc. Nat. Hist., vol. 9, 

 1940, pp. 204-206, pi. 8, fig. 3, map. 



Type.—V.S.'NM. No. 15719. 

 Type locality. — Tucson, Ariz. 



Range. — "Southeastern Pinal County and eastern Pima County, west 

 to Organ Pipe Cactus National Monument, Pima County, Arizona." 



PHYLLORHYNCHUS DECURTATUS DECURTATUS (Cope) 



Phimothyra decurtata Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 20, 1868 



(1869), p. 310. 

 Phyllorhynchus decurtatus decurtatus Klaubeb, Bull. Zool. Soc. San Diego, No. 



12, 1935, pp. 9-11, fig. 1 ; Trans. San Diego Soc. Nat Hist., vol. 9, 1940, pp. 



206-207, 210, map. 



Type.— Acad. Nat. Sci. Phila., No. 5489. 



Type locality. — "The upper part of Lower California." 



Range. — Central and southern Baja California. 



PHYLLORHYNCHUS DECURTATUS NUBILIS Klauber 



Phyllorhynchus decurtatus nubilis Klaubek, Trans. San Diego Soc. Nat. Hist., 

 vol. 9, 1940, pp. 197-201, pi. 8, fig. 1, and map. 



Type.—L. M. Klauber (San Diego, Calif.) No. 32493. 



Type locality. — Xavier (Weisner's Ranch), Pima County, Ariz. 



Range. — ^Vicinity of Tucson, Pima County, Ariz. ; west-central and 

 northwestern Sonora (recorded in Mexico from Alamo Muerto, La 

 Posa, and San Carlos Bay, Sonora) . 



♦PHYLLORHYNCHUS DECURTATUS PERKINSI Klauber 



Phyllorhynchus decurtatus perkinsi Klaubek, Bull. Zool. Soc. San Diego, No. 12, 

 1935, pp. 11-16, fig. 2; Trans. San Diego Soc. Nat. Hist., vol. 9, 1940, pp. 

 207, 210. 



01 From Klauber, op. cit., 1940, pp. 209-210. 



=2 Occurrence in Mexico almost certain, but no records are yet available. 



