vol 



;.j^"'] PROCKEDINGS OF THK NATIONAL MUSl^UM. (175 



Storeria dekayi llnllirnoU. 



Bd. and Gird., Cat. K<>pt. N. Ainer., Pt. i, Serpents, lr:5:{, ji. VAa; Copo, C'lu-ck List 



N. Amor. I{(>pt. I?;itr., IS?;'), p. .J2. 

 Tropidonotna lUkaiji llDlbrook, N. Amor. Ilerpet., iii, l-l'J, p. .'>:!, I'l. .\i\ ; l>fk;iy, Now 



York Fauna Ivopt., 1-^IJ, p. It! ; Inchiuxjnathm dvlayi Diim., Hilir. Krp. Gon., vii, 



lHr>'J, p. 507; Giinthor, C'atal. Col. Snakos Brit. Mhh., lH.'>i<, ji. Bl; .Jan, loon. (ion. 



Olid., II, p. :{(), Fi<;.s. :?, I : Tropidonolitu onliiuilun tUmer, Hopt. Mns«., IKVJ, 'i'S.l. 



United States, exclusive of Pacitic region ; Mexico. 



Storeria occipitomaculata Storo-. 



Bd. and Gird., Cat. .Serpt. N. Amor., 1S.'):5, p. i:!T : Copo, Chock Liwt Batr., Ivopt. N. 

 Am«r., 187"), p. 4'J ; Tropidonol us occ'ipilomacitlat us iHorer, Ivop. Ivopt. MaHM., lr*'A'J, 

 p. 2.50; IschnognatliKi occipitomaculatus Giinthor, Cat. Colubr. Sn:tkc.s Brit. Mu.s., 

 18r)8, p. 81 ; Jan, Icon. Gen. Olid., ii, p. 30, Fig. 'J; Culitbtr r(»iH»<«» Hallow., I'roc. 

 Acad, riiila., 1.S47, ni, p. 274; loc. cit., iv, 184lt, p. 24.'>. 



United States, exclusive of Pacitic region ; Mexico. 



AMPHIARDIS Cope. 



Proc. IT. S. Nat. Mns., Id88, p. .WL 



ITcad not distinct; teeth equal. Scales keeled; anal and siilxaud.d 

 scuta <livided. Cephalic scuta of upper surface norinal. Rostral not 

 prominent ; two internasals. Two nasals; one loreal, which extends to 

 the orbit. No preocular. Pupil round. 



This genus embraces as yet but a single species. It is most nearly 

 allied to Ilaldea, from which it differs only in the presence of two inter 

 nasal plates. The species is little known. 



Amphiardis inornatus (iarnian. 



Copo, Proc. U. S.Nat. MuH., 1888, p. 31)1; Virginia iiiornuta (iarniaii, Mem. Mus. 

 Comp. Zool. Cauibr., vui, 1883, p. 1)7. 



From near Dallas, Tex. 



HALDEA Hd.and (Jird. 



Cat. liop. N. Amor. SorjuMits. is.'):?, p. 122 : CiniorcphalKs I)nmi<ril. Pnxlonio do« ( »phi- 

 •lioiis, p. 4t), 18.")3; rah-<>ntri<i Tliooliald, to.st«' B<>iilaiii:or. 



Head elongated, ellipsoi«l, distinct from tli.- ImmIv. iiitern:)sal plate 

 sinj,de. Prebontals large, entering together with the hnal into ihi" 

 orbit, thus suppressing the anteorbital.s. Po.^torbital one. Two nasals. 

 Pupil cinnilar. Scales carinated. Postabdominal scutella bifnl. Sub 

 caudals divided. 



This genus has the form and pn)l)al)ly thf habits t)f th*- ("alamarin.i-, 

 but the continuity of the vertebral hyitapophy.-^es throughout the v«t- 

 tebral column indicates that its allinities are with the Natricinsc, of 

 which group it is probably a degenerate olfshoot. 



