262 AMPHIBIANS AND REPTILES. 



4. Diemictylus viridescens Rafinesque. Newt.- — As Avas to have 

 been expected, this amphibian was comparatively common in the 

 region explored. Adults were secured in the permanent ponds on 

 Stony Island and throughout the sand region, from Sand Point to 

 Rush Lake. Larvae were found in a pond on Stony Island, and the 

 terrestrial form was found under logs in the woods on Stony Island 

 and in a swale back of the beach on the north side of Sand Point. 



5. Bufo americanus Le Conte. Toad. — Singularly enough this 

 amphibian could not be found in the sand region proper, except on 

 the low ground about the mouth of the Pigeon River. Specimens 

 were also found on Stony Island and in the woods at the east end of 

 Rush Lake. 



6. Hyla versicolor Le Conte. Tree toad. — A series of eleven 

 specimens of this amphibian was obtained. It was found to be 

 relatively common in all of the sand region localities investigated 

 and on Stony Island. The immature individuals (July 11 and 15) 

 were taken about the margins or in the recently dry beds of ponds; 

 the adults on plants, the walls of shacks, etc., in wooded swamps and 

 even on the dry ridges. 



7. Hyla pickeringi Holbrook. Spring peeper.— As H. versi- 

 color the spring peeper is not uncommon in the sand region, and it 

 was also observed on StonN^ Island. Adults were taken on the vege- 

 tation in the wooded swamps on Sand Point, Hat Point and Rush 

 Lake, in the grassy margins of ponds on Sand Point and Stony Is- 

 land, and a single specimen on the beach near the extremity of Sand 

 Point. On the prairie at the base of Sand Point immature individuals 

 were found on the sites of ponds that had recently become dry (July, 

 3). 



8. Chorophilus nigritus triseriatus (Wied). Swamp tree-toad. — 

 A few^ adult specimens of the swamp tree-toad were secured at the 

 following places: Stony Island, North Island, Sand Point, woods at 

 east end of Rush Lake. These were all taken in grassy areas, except 

 the single specimen from the last named locality. On July 11, a 

 great number of immature specimens were taken on the mud beds 

 of dried-up ponds, on the prairie at the base of Sand Point. 



I hesitate to refer the Michigan representative of this genus to 

 the subspecies triseriatus, for the relations of the forms of this 

 group do not seem as yet to be satisfactorily worked out. I am 

 unable to distinguish the specimens from Huron Count}^, as well 

 as those from Ann Arbor, from Iowa material, all of these specimens 

 having a rather short hind-limb (the length to the heel equaling the 

 distance from the anus to some point between the ear and eye) and 

 a rather prolonged snout; characters that seem to refer this form to 



