the nostril to the eye and from the eye through and beyond the 

 tympanum. Then there is a broken line of dark spots to the groin. 

 There is orange or yellow in the groin and on the rear of femur 

 and on the foot. The arms, legs and feet are indistinctly barred with 

 dark. The upper jaw is a beautiful light pinkish cream color. The 

 throat of this one (male) is dark in color, greenish. In middle of the 

 light belly is a broad, longitudinal bluish area. 



Another male is bright green, with an indistinct triangle between 

 the eyes and round dark spots on the back. The dark mask is bordered 

 above by a light pinkish cream line and below by the light jaw. The 

 throat is olive with some orange on the center rear portion. Orange 

 yellow is conspicuous in the groin and on the rear of the femur. 



Structure: Upper parts smooth, not warty as is the usual condition 

 of H. arenicolor; prominent breast fold; tympanum round. 



Voice: The call is kreck-ek in rapid sequence. 



Breeding: They breed from early January to mid-May. The brown 

 and yellowish eggs, in small, loose irregular masses are laid beneath 

 or sometimes at the surface, attached to vegetation. The egg is 1/20 

 inch (1.3 mm.), the inner envelope 1/12 inch (2 mm.), the outer 

 envelope 3/1 6-1/4 inch (4.7-6.7 mm.). The tadpole is medium 1 7/8 

 inches (46.6 mm.)', full and deep-bodied, its tail tip acute or obtuse 

 without a flagellum. It is dark brownish in color and the tooth ridges 

 are 2/3. After a tadpole period of 50 to 80 days, they transform from 

 May 15 to September 1, at 7/16-11/16 inch (n-17 mm.). 



Notes: August 12, 191 7. We camped at Jacumba, Calif., beside 

 the Mexican border. . . . In a little side stream of the creek we found 

 a series of//, regilla from tadpole to transformation. In the same place 

 among the weeds of the moist area we took 6-10 adults very variable 

 in color. 



August 25, 1 91 7. In Alta Meadows, we found no end of trans- 

 formed Hyla regilla. In the bog-terraced pools were plenty of tadpoles 

 and advanced stages of Hyla regilla. On the trail, R. C. Shannon 

 found a full grown frog and the boys reported a large one from Alta 

 Peak. The transformed frogs were in the meadow land. 



August 20-22, 1925. Las Vegas^ Nev. Tonapah Road. . . . We 

 followed one tiny stream back into the field and returned with the 

 trophies of the search: 6 Rana onca, 4 Hyla regilla^ 1 Bufo compactilis. 

 ... In a broad springy area sedgy and shady, we picked up a H. 

 regilla. In one very small sedgy area, we caught four, three of which 

 had a triangle between the eyes and some dorsal stripes. A half grown 

 one was green with no triangle and only the vitta back of the eyes. 

 Later at the big springs, we caught one that looked very yellow with 

 very indistinct pattern. . . . We caught several tadpoles. 



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