194 MICHIGAN ACADEMY OF SCIENCE. 



28. Osceola doliata triangula (Boie). Spotted adder. Milk snake. 



Rather unrommon. 



29. Natrix fasciata sipedon (L). Water snake. Black snake. 



Very common. ■ The largest specimen seen measured 47 1^ inches. The 

 color varies very much but does not approach the next species in any 

 way. The females are much larger than the males. Very ugly and 

 strikes savagely, but is perfectly harmless. 



30. Isiatrix erythrogaster (Shaw). Red-bellied black snake. 



Common between Pine lake and the Olivet mill pond along the creek, but 

 not a specimen has been seen elsewhere. Very active and shy. The 

 largest specimen seen measured 51 inches. ' Color very constant, but 

 the red fades rapidly in formalin or alcohol. I have never found this 

 species with the preceding and am confident they do not interbreed. 

 Thanks to Dr. Stejneger of the National Museum, I have compared Oli- 

 vet specimens with one from the Dismal Swamp. Virginia, and could 

 find no difference, but as the latter was much faded, from preservation, 

 it is possible that the colors in life are quite different. It is an open 

 question whether our Michigan snake is really Shaw's erythrogaster or 

 not. See American Naturalist for January, 1903. 



31. Natrix leberis (L). Banded water snake. 



Rather rare near Olivet, but apparently not uncommon near Narrow lake, 

 in Brookfield. where I saw three specimens in an hour. The longitu- 

 dinal black bands are sometimes very indistinct, while the amount of 

 clouding with slate-color on the belly is quite variable. 



32. Storeria clekayi (Holbrook). Brown snake. 



Apparently rather uncommon. The ventral surface is sometimes bright 

 salmon-red instead of gray, though the color is soon lost in a preserving 

 fluid. 



33. Thamiiophis saurita (L. ) Riband snake. 



Quite common near water. Perhaps our handsomest snake. 



34. Thamtiophis sirtaUs (L.) Streaked snake. Garter snake. 

 34a. Thamnophis sirtaUs parietalis (L. ) 



Very abundant, parietalis apparently outnumbering the typical form about 

 3 to 1, but both are very variable. Investigations into these variations 

 are now under way and pi'omise some interesting results. 



35. Sistrurus catenatus (Rafinesque). Massasauga. Rattlesnake. 



Not uncommon and said to be locally abundant. 



In the Olivet college museum is a specimen of Coluber guttatus (L.), 

 labelled "Elaphis guttatus. Olivet, Mich." but as the species is distinctly 

 a southern one. it is probable that the specimen is incorrectly labelled. 



SAUEIA. 



36. Sceloporus vndulatus (Latreille). Swift. Common lizard. 



Said to occur but I have yet to see a specimen, dead or alive. As it is 

 known to occur in Michigan.. it probably is entitled to a place in this list. 

 Olivet College, June 20. 1902. 



