558 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



eggs did not exceed 1 mm. in diameter. The gelatinous matter snr- 



DC C3 



rounding them was thin and transparent and appeared to be light 

 enough to keep the eggs at the surface of the water, although they 

 were never found entirely free from alga 3 or other floating vegetation. 

 The entire egg-mass was difficult to see because of the small size of 

 the eggs, the transparency of their envelope, and their location. 



The larva? are said by Dr. O. P. Hay to transform late in August. 

 I saw some leaving the water about the middle of July. These 

 could not have hatched from the eggs above mentioned. They are 

 more active than any other amphibian larv;e I have seen. They 

 can run about, spring from object to object, and cling with their feet, 

 while the tail is still as long as the body. In captivity I have seen 

 the adults leap across an aquarium and catch a fly resting on the 

 glass of the other side. 



Width of head over tympanum, 9 mm. ; tip of snout to anterior 

 edge of tympanum, 8 ; length from tip of snout to vent, 27 ; vent to 

 heel, 26 ; vent to tip of longest toe, -16. 



CHOROPHILUS NIGRITUS FERIARUM (Paird). 

 STRIPED TREE-FROG. 



The striped tree-frog was not positively identified at Mitchell. 

 Late in the autumn a frog thought to be of this species was seined 

 from a pond, but it escaped before it could be examined. I also 

 thought I heard its note in the spring, but did not succeed in-finding 

 the animal. It is probable, however, that it occurs in certain local- 

 ities near here, as it is common in southern Indiana. On June 1 

 it was abundant at West Baden, 25 miles southwest of Mitchell. 

 Heavy rains had fallen, and the frogs were in small temporary ponds 

 voicing their shrill, rapidly repeated whistle during the early after- 

 noon. They were not easily disturbed, and several were caught as 

 they sat on floating leaves. During the last week of June the newly 

 transformed young were abundant in the cypress swamp on the 

 [ndiana side of the Wabash River opposite Mount Carniel, Illinois. 



A specimen from West Baden has the median stripe entire except 

 on head and rump, where it is broken ; next two stripes slightly 

 broken; lower stripes entire nearly to groin. 



Width of head over tympanum, 10 mm.; length from tip of snout 

 to anterior border of tympanum, 8; snout to vent, 29; vent to heel, 

 26; vent to tip of longest toe, 46. 



Some newly transformed young, from the cypress swamp previ- 

 ously referred to, vary considerably in color and the distinctness of 

 the markings. One is light gray, with all the bands, as well as the 

 bars of the legs, obscure. Two others have the dorsal stripes faint 

 and narrow but continuous, while on two others they are broad and 

 well defined but broken. 



