Vol. XI] VAN DENBURGH-SLEVLN— AMPHIBIANS AND REPTILES 43 



13. Sceloporus graciosus graciosus (Baird & Girard) 



The collections contain fifty-four specimens from Idaho. Of 

 these, two (Nos. 20947, 20948) were collected at Pocatello, 

 Bannock County; one (No. 20949) is from Idaho Falls, Bonne- 

 ville County; thirty-eight (Nos. 41110-41119 and 41277- 

 41304) were secured at Fort Hall, Bingham County, August 

 11-16, 1916; and thirteen (Nos. 41385, 45435-45446) were 

 found at Boise, Ada County, in August and September. 



The femoral pores in fifty-four specimens vary from eleven 

 to seventeen; being 11 twice, 12 nine times, 13 twenty-five 

 times, 14 thirty-two times, 15 twenty-two times, 16 sixteen 

 times, and 17 twice. The average of the one hundred and eight 

 thighs is 14.1. 



14. Sceloporus occidentals biseriatus (Hallowell) 



All our Idaho specimens were secured near Boise, Ada 

 County. Here two (Nos. 45449, 45450) were taken September 

 9, 1914, thirteen (Nos. 41372-41384) August 25-28, 1916, and 

 two (Nos. 45447, 45448) August 16, 1918. 



The femoral pores in seventeen specimens vary from thirteen 

 to seventeen ; being 13 six times, 14 six times, 15 fourteen times, 

 16 four times, and 17 four times. The average of the thirty- 

 four thighs is 14.8. 



15. Phrynosoma douglassii (Bell) 



Our three Idaho specimens of this horned-toad were taken 

 one (No. 41305) at Fort Hall, Bingham County. August 11, 

 1916, and two (Nos. 45433, 45434) at Boise. Ada County, in 

 July and August, 1916. 



16. Phrynosoma platyrhinos Girard 



One specimen (No. 20932) from Bliss, Gooding County, is 

 in the collection. Its femoral pores are 11-11. 



17. Cnemidophorus tessellatus tessellatus (Say) 



Only six Idaho specimens are at hand. These are one (No. 

 20944) from Upper Salmon Falls, Twin Falls County, and 

 five from Boise, Ada County, where they were taken (No. 



