56 CALIFORNIA ACADEMY OF SCIENCES [P*oc. 4th Se*. 



size. They are somewhat vicious when captured, and when 

 held by the tail will always keep the mouth open ready to seize 

 whatever comes within reach. 



The coloration in life of No. 46408, was as follows : The 

 back and sides are grayish, mottled with black. Three trans- 

 verse black bands cross the shoulders. The upper surfaces of 

 the fore limbs are black, spotted with gray ; of the hind limbs, 

 gray mottled with black. The gular region is black, bordered 

 with gray. The ventral surface between the fore limbs is black. 

 The belly is grayish. 



The femoral pores in fifty specimens vary from four to seven ; 

 being 4 six times, 5 thirty-nine times, 6 forty-four times, and 

 7 eleven times. 



13. Dipsosaurus dorsalis dorsalis (Baird & Girard) 



Three specimens collected at San Xavier probably belonged 

 to this subspecies. These were Nos. 3781, 3824 and 3844. 



14. Dipsosaurus dorsalis lucasensis Van Denburgh 



This lizard, abundant throughout the low brushy country in 

 the Cape Region, was collected at the following localities : 

 La Paz, San Pedro, Triunfo, San Bartolo, Buena Vista, San- 

 tiago, Agua Caliente, Miraflores, San Jose del Cabo, Cabo San 

 Lucas and Todos Santos. The local name is Cachora. This 

 species was not noted above 1020 feet and was particularly 

 abundant close to the coast. Among the sand dunes back of 

 the beach at San Jose del Cabo any number of specimens could 

 be collected. Their principal enemy seemed to be the red racer, 

 and two or three specimens of this snake when captured were 

 found to contain the remains of a Dipsosaurus, and one red 

 racer had a full grown lizard of this species in its stomach. 



The femoral pores in fifty specimens vary from sixteen to 

 twenty-one; being 16 twice, 17 eighteen times, 18 thirty-six 

 times, 19 twenty-six times, 20 twelve times, and 21 six times. 



18. Uma notata Baird 



A single specimen (No. 39687) collected south of Laguna 

 Salada about eighty miles south from Mexicali, April 5, 1915, 

 was presented to us by Mr. R. C. Murphy. 



