156 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 91 



with a middle belt of spines; ventrals 243 or less, caudals 86 or less; 

 anal entire ; spots on body 34 or less. 



Specimens examined. — Twelve, including type. 



Locality i^ecords. — Various localities in California, Nevada, Utah, 

 Arizona, and Sonora (Klauber, op. cit.., p. 187). 



Rem^arks. — The hemipenis of a specimen from Guaymas, Sonora 

 (EHT-HMS No. 4572) is more than 16 caudals long (a portion 

 everted, dried) ; three large flounces cover the length of about 11 

 caudals; an area of spines covers a length of about five caudals, 

 proximal to area of flounces. 



Another specimen from Telegraph Pass, Summit of Gila Moun- 

 tains, Yuma County, Ariz. (L. M. Klauber, No. 25488) has a hemi- 

 penis 22 caudals long ; three large flounces^ extending to the thirteenth 

 caudal from base, passing through an area of enlarged spines covering 

 the length of three caudals; remainder ridged, with tiny spicules. 

 The spinous area in this specimen includes the proximal ends of the 

 flounces, from the fourteenth to the sixteenth caudal inclusive; in 

 other words, the spines begin about seven caudals from the distal tip. 

 This is different from the condition in the Guaymas specimen, but 

 there seems to be a similar variation in position of the spinous area 

 in other species. 



TRIMORPnODON LYROPHANES (Cope) 



Lycodon lyrophanes Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 12, p. 343, 



1860 (Cape San Lucas, Baja California). 

 Trimorpliodon lijrophanes Cope, Proc. Acad. Nat. Sci. Philadelphia, vol. 13, p. 



297, 1861.— Taylor, Kansas Univ. Sci. Bull., vol. 25, p. 363, 1938 (1939).— 



Klauber, Trans. San Diego Soc. Nat. Hist., vol. 9, pp. 181-187 (part), pi. 



7, fig. 2, 1940. 



Diagnosis. — Large V-shaped marks on head, these continued onto 

 neck, not terminating laterally behind head; hemipenis relatively 

 short, without enlarged spines ; ventrals less than 243 ; anal divided. 



Specimens examined. — Nine. 



Locality records. — Various localities in Baja California : Cape San 

 Lucas, San Jose del Cabo, Santa Anita, Miraflores, Sierra San 

 Lazaro, Todos Santos, La Paz, Santa Kosalia, San Ignacio (Klauber, 

 loc. cit.). 



Remarks. — The present species differs most markedly from lambda 

 in the character of the hemipenis, which is spineless (^. e., without 

 enlarged spines) and shorter in lyrophanes (as in 'vandenhurghi) , 

 while in lambda it is longer and with spines (as in all other Trlmor- 

 phodon). Three hemipenes dissected in situ on specimens from 

 Baja California agree well with the description of the extruded 

 hemipenis of vandenburghi given by Klauber {op. cit., p. 170), with 

 the exception that there are but three large flounces (instead of four; 



