HERPETOLOGY OF ZUNI MOUNTAINS — GEHLBACH 273 



Like Bufo woodkousei, this hylid may have two or more brecdijig 

 seasons coinciding with separate peaks of precipitation. Heavy July 

 rains initiated calling in pools where adult H. arenicolor had not been 

 in evidence previously. Two adult females with large yolked eggs 

 (ca. 1.6 mm. diameter) were collected July 6 and August 27, 1956; 

 they measure 45 and 50 mm. snout-vent and are larger than most 

 males taken with them (table 4) . 



Four transforming larvae, 17 to 20 mm. body length, were found 

 July 2-6, 1956, at 7800 feet; eggs Avere laid July 16, 1956, in the same 

 pond. On the latter date, in 1957, larvae in all stages including 

 some with external gills were coUected at 7800 feet. The water 

 temperature was 75° F. at 11:20 a.m., the ah- 83° F., at this same 

 locahty on July 3, 1959, when a similar series was found. Of these 

 specimens, 12 legless larvae measure 9-13 (x 10.9) mm. body length; 

 12 with both pairs of legs are 14-17 (15.7); and 12 recently trans- 

 formed are 22-28 (24.7) mm. snout-vent. They are similar m 

 size-group composition to a series (UMMZ 121950) obtained Septem- 

 ber 4, 1960, near Snowflake, Navajo County, Arizona, by Robert E. 

 Miller, and they are larger than larvae from the Chuicahua Mountams, 

 Cochise County, Arizona (Zweifel, 1961). 



Adults and larvae were found often in rocky canyon pools of the 

 riparian association at elevations where the pinyon- juniper or ponder- 

 osa pine associations dominated surrounding hillsides (pi. IB). The 

 tadpoles were usually associated mth larvae of Bwfo woodhousei and 

 Rana pipiens in potholes 1-10 feet in diameter and not more than 10 

 inches deep. Such habitats were devoid of aquatic vegetation and 

 probably resulted from recent stream subsidence. On July 18, 1956, 

 five calling males were found in water-filled, eroded pits on the top of a 

 sandstone outcrop at 6400 feet. This outcrop was isolated by level 

 grassland, characterized by junipers and scattered pinyons at the east 

 edge of the Grants malpais. 

 Locality records: 



MCKINLEY CO.: 6 mi. S. Thoreau (UMMZ 120297) ; 7 mi. S. Thoreau (CU G333) ; 

 8mi.S.Thoreau(CU6232,6412);Ft. Wingate (USNM 14404, 53587); Valencia 

 CO- 1 mi. N. Cebolleta (UMMZ 86605); 4 mi. WSW. Cebolleta (UMMZ 

 86606); Ranger Station, Lobo Canyon, Mt. Taylor (UMMZ 86607); 1 1-5 mi- 

 SSE. Grants (CU 6233); Grants (CU 5371, 5373, 5381, 5393, 5402; KUMNH 

 19360-7*). 



Pseudacris triseriata triseriuta Wied x P. t. macuUita Agassiz 



Known from only seven published locaUties, the western chorus frog 

 has been studied very little in New Mexico. Smith (1956) reassigned 

 the subspecific name maculafa to P. nigrifa (=P. triseriata, Schwartz, 

 1957, p. 11) from Colorado, Utah, and northward. With the exception 

 of a smglc specimen of P. t. triseriata x P. t. macvlata from Colfax 



