30 CALIFORNIA ACADEMY OF SCIENCES TProc. 4th Ser. 



6. Hyla regilla Baird & Girard 



One hundred and three Hylas (Nos. 36856 to 36958) were 

 secured at Las Vegas, Clark County, Nevada, May 1 and Au- 

 gust 10 to 13, 1913. They were found in grass along the 

 edges of a stream. The webs between the toes are small in 

 these specimens. 



While this seems to be the only tree-toad as yet collected in 

 Nevada, there can- be little doubt that Hyla arenicolor occurs 

 along the Colorado River. 



7. Rana pipiens Schreber 



From Nevada, we have a series of one hundred and fifty- 

 seven specimens of this frog. Twelve (Nos. 37318 to 37329) 

 were collected at Caliente, Lincoln County, Nevada, August 

 14-21, 1913. Others (Nos. 37859 to 37990) were secured at 

 Elko, Elko County, Nevada, July 14 to 16, 1913, and (Nos. 

 40948 to 40959) July 19, 1916. ' One frog (No. 40935) was 

 taken at Carlin, Elko County, July 17, 1916. 



9. Rana onca Cope 



Rana onca was described by Cope from a single female speci- 

 men collected by Dr. H. C. Yarrow, in 1872, and labeled 

 merely Utah. There seems to be no doubt that this is the same 

 species which Dr. Stejneger later described as Rana fisheri, 

 basing his description on specimens collected in Vegas Valley, 

 Nevada. Our collections include ninety-nine specimens (Nos. 

 36757 to 36855) from Las Vegas, Clark County, Nevada, col- 

 lected May 1 and August 10 to 13, 1913. These frogs were all 

 caught in a small stream from a flowing well about a mile 

 northwest of the town of Las Vegas. Rana pipiens was not 

 found in this vicinity although it was taken at Caliente less than 

 one hundred and fifty miles away. We have not found Rana 

 onca elsewhere. 



12. Sauromalus ater Dumeril 



Three specimens (Nos. 37509 to 37511) were secured at 

 Rhyolite, Nye County, August 3 to 9, 1913. They were found 

 on rocks in a railroad cut. No. 37511 has 16-16 femoral pores. 



