Hyla cinerea 265 



Dangers. The presumptive eggs discovered June i, 191 2, in the edge of the 

 cleared fields were in a pool with 2 inches of water. On June 4, the pool was 

 a mere moist depression with no water. No doubt the percentage of loss 

 from such a cause is great but not so much so in this species as in Hyla 

 femoralis, Bufo quercicus, Gastrophryne carolinensis. Hyla cinerea normally- 

 lays in deeper water than these three species. 



HATCHING PERIOD 



The eggs discovered June i, 191 2, in a pool with 2 inches of water were 

 hatched June 4, or three days later. The eggs laid by a pair after midnight 

 on the night of June 4-5, 192 1, hatched June 7 by 6:00 a. m., or about two 

 days after ovulation. These were in a shallow basin and the air temperatures 

 were: maxima 82°-89°, minima 66°-7o°. 



MATURE TADPOLE 



Color description from life {July 26, 1921). Top of body generally citrine 

 or olive green or oil green, sometimes a bright spinach green or forest green. 

 Stripe on side of head from snout to eye sulphur yellow and ivory yellow. 

 Belly solid cartridge buff or ivory yellow. Breast and lower throat light 

 vinaceous fawn. Mental region and upper throat dusky slate-blue with scat- 

 tered spinach green spots. Sides of the body in branchial region and under 

 eye spotted dusky and slate blue or slate-blue, light vinaceous fawn, cartridge 

 buff, sulphur yellow. 



General color of tail sulphine yellow to citrine. Amongst brown and far 

 down tail sulphur yellow to light green yellow edges to crests or between 

 crests. Base of muscular part of tail with some light vinaceous-fawn spots 

 along the middle of it for i centimeter or more. In almost mature tadpoles 

 not black spots on the crests. About time hind legs begin to grow upper and 

 lower crests with prominent blackish spots. Fine spinach green flecks over 

 tail except near the edges of the tail crests. In the younger tadpoles without 

 blackish spots the black is in specks all over the tail and these faintly appear 

 on the tail crests as dark edges. 



Iris light cadmium to buffy yellow with dusky in front and behind the 

 pupil. 



General appearance. Tadpole medium (40 mm.) full and deep bodied. 

 Tail acuminate, tip acuminate, sometimes acute. Tail long. The dorsal and 

 ventral crests about equal and about equal to musculature in depth. The 

 dorsal crest extending on to the body to the vertical about midway between 

 the eye and spiracle. Spiracle sinistral, directed upwards and backwards, 

 far below lateral axis, the spiracular opening very visible as a round or elHpti- 

 cal opening. Eye on lateral axis, in dorsal aspect on the lateral outline and 

 in consequence visible from the venter. Anus dextral, or only slightly above 

 the lower edge of the ventral crest. Muciferous crypts not distinct. As they 

 approach transformation the whole tail becomes spotted with conspicu- 

 ously dark and light spots. 



