Vol. XI] VAN DENBURGH-SLEVIN— AMPHIBIANS AND REPTILES 31 



13. Crotaphytus collaris baileyi (Stejneger) 



Our Nevada collections include forty-three specimens of this 

 lizard. Eight (Nos. 37044 and 37055 to 37061) were col- 

 lected at Caliente, Lincoln County, May 4 to 8, and August 21, 

 1913. Thirty- four (Nos. 37693 to 37726) were secured at 

 Tonopah, Nye County, July 23 to 27, 1913. No. 37514 was 

 shot at Rhyolite, Nye County, August 3 to 9, 1913. The cen- 

 tral head scales are in two series in all these specimens. 



Femoral pores in forty-two specimens vary from 14 to 20; 

 being 14 once, 15 twice, 16 seventeen times, 17 thirty-three 

 times, 18 nineteen times, 19 eight times, and 20 four times. 



14. Crotaphytus wislizenii Baird & Girard 



Eighty-one of these lizards were collected in Nevada in 1913 

 and 1916. Of these, forty (Nos. 37014 to 37043 and 37045 to 

 37054) were secured at Caliente, Lincoln County, May 4 to 8, 

 and August 4 to 21 ; five (Nos. 37688 to 37692) were'taken at 

 Tonopah, Nye County, July 23-27; two (Nos. 37512 and 

 37513) were shot at Rhyolite, Nye County, August 3-9; one 

 (No. 37801) was secured at Goldfield, Esmeralda County, 

 July 29; one (No. 37996) was caught in Smoky Valley, Nye 

 County, July 22; and two (Nos. 38016, 38017) were collected 

 near Reno, Washoe County, Sept. 1 1 ; twenty-nine ( Nos. 

 40507 to 40535) were taken near Sutcliffe, Pyramid Lake, 

 Washoe County, June 30 to July 13, 1916; and one (No. 

 40933) was shot at Carlin, Elko County, July 16, 1916. 



Femoral pores in forty-nine specimens vary from 14 to 23; 

 being 14 once, 15 nine times, 16 twelve times, 17 eighteen 

 times, 18 eighteen times, 19 thirteen times, 20 ten times, 21 

 ten times, 22 twice, and 23 five times. 



15. Callisaurus ventralis ventralis (Hallowell) 



Twenty-nine (Nos. 37062 to 37069 and 37070 to 37090) 

 were shot at Caliente, Lincoln County, May 4 to 8, and August 

 14 to 21, 1913. Thirty (Nos. 37518 to 37547) were taken at 

 Rhyolite, Nye County, August 3 to 9, 1913. 



Femoral pores in fifty-seven of these specimens vary from 

 11 to 18; being 11 once, 12 four times, 13 eight times, 14 



