378 KANSAS UNIVERSITY SCIENCE BULLETIN. 



persons had observed the same habit. The snake probably at- 

 taches itself in order to suck the blood of its victim. 



The Hog-nosed Snake occurs throughout the state. I have ex- 

 amined specimens from Clay, Hamilton, Rawlins, Republic, 

 Mitchell, Ellsworth, Scott, Douglas, Logan, Lyon, Gove, Frank- 

 lin, Clark and Norton counties. Specimens have been reported 

 from Montgomery, Stanton, Logan, Morton, Neosho, Osborne 

 and Phillips counties. 



NATRIX Laurenti. 



Natrix Laurenti, Spec. Syn. Rept., 1768, p. 73. 



Tropidonotus Kuhl, Isie von Oken, 1826, p. 205. 



Nerodia and Regina Baird and Girard, Cat. N. Amer. Rept., Pt. I, Serp., 

 1853, pp. 38, 45. 



Teeth longer on posterior part of maxillary bone. Head 

 scutella normal. Oculars 2-2. Loreal 1. Nasals 2. Anal 

 divided. Urosteges in two series. Dorsal scales in Kansas 

 species in from 19 to 27 rows. Scales all keeled. 



KEY TO KANSAS SPECIES. 



I. — Body with etripee ; scales in 19 rows N. grahamii. 



II. — Body with spots or cross-bands; scales in 23-27 rows. 



1. — Scales in 23 (occ. 25) rows. Dark brown with alternating spots. 



Sometimes cross-bands anteriorly N. faacinta. 



2. — Scales in 27 rows. Alternating dark brown spots N. rhombifera, 



Natrix grahamii Baird and Girard. 



Graham's Qaeen Snake. 



Regina grahamii Baird and Girard, Cat. N. Amer. Rept., Pt. I, Serp, 1853, 

 p. 47. 



IVopidonotics grahamii Giinther, Cat. Colubr Snakes Brit. Mus., 1858, 

 p. 78; Boulenger, Cat. Snakes Brit. Mus., I, 1893, p. 240. 



Natrix grahamii Cope, Proc. U. S. Nat. Mus., XIX, 1892, p. 668. 



Nineteen rows of scales ; outer row smooth, all of the others 

 strongly keeled ; scales in outer row wider than long, slightly 

 notched at the tip ; scales in other rows more decidedly notched. 

 Frontal pentagonal. Occipitals long. Parietals narrow. Pre- 

 frontals wider than long. Internasals right-triangular, with 

 the apex slightly truncated. Nasal broad and long ; nare 

 small, situated slightly above the center of the plate. Loreal 

 high, pentagonal. Oculars 2-2. Temporals 1-2. Anal plate 

 divided. Upper labials seven, fifth and sixth largest. Lower 

 labials ten, fifth largest. Postgenials much longer than pre- 

 genials. Gastrosteges 155-175. Urosteges 50-70. 



