INTRODUCTION. 



Xill 



12.* Eutainia radix, B. & G Wisconsin 



13.* " elegaiis, B. & G California 



14.* " vagrans, B. & G Mex., Cal., Oregon. 



Page 

 .. 34 

 .. 34 



.. 35 



15. 



16. 



Marciana, B. & G. 

 conciuna, B. & G.. 



.Ark., Texas 36 



.Oregon 146 



NERODIA, B. & G. 



1. Nerodia sipedon, B. & G Mich., Mass., Penna.,N.Y., Md.. 38 



2. " fasciata, B. & G South Carolina 39 



3. " erythrogaster, B. & G La., S. C 40 



4.* " Agassizii, B. & G Lake Huron 41 



5.* " Woodhousii, B. & G .Texas 42 



6. " taxispilota, B. & G Georgia 43 



7.* " Kolbrookii, B. & G Louisiana 43 



8. " niger, B. &G Massachusetts 147 



9. " rhombifer, B. & G Arkansas 147 



10. " transversa, B. & G Arkansas 148 



REGINA, B. & G. 



1. Regina leberis, B. & G Mich., Ohio, Penna 45 



2. " rigida, B. & G Penna., Georgia 46 



3.* " Graliamii, B. & G Texas 47 



4.* " Clarkii, B. &G Texas 48 



NINIA, B. & G. 



1.* Ninia diademata, B. & G Mexico 49 



HETERODON, Beauv. 



1. Heterodon platyrhinos, Late Penna., Va., S. C, Ohio, Miss... 51 



cognatus, B. & G Texas 54 



" niger, Troost Penna., S. C, Miss 55 



atmodes, B. & G Ga., S. C 57 



" simus, HoLBR S. C, Miss 59 



" nasicus, B. & G Ark., Texas, Sonora, Cal 61 



2.* 



3. 



4.* 



5. 



6. 



PITUOPHIS, HoLBB. 



1. Pituophis melanoleucus, Holbk... Carolina 65 



2. " bellona, B. & G Texas, Cal., Sonora 66 



3.* " McClellanii, B. & G Arkansas 68 



4. " catenifer, B. & G California 69 



5.* " Wilkesii, B. & 6 Oregon 71 



6.* " annectens, B. & G California 72 



SCOTOPHIS, B. & G. 



1. Scotophis alleghanieasis, B. & G... Pennsylvania 73 



2.* " Lindheimerii, B. & G Texas 74 



3.* " vulpinus, B. & G Mich., Wise 75 



