'"i's'Jl'J PliOCEEDIN(;S OK TIIK NATK >\A I- MI'SKl'M. (;25 



Tlio length and diiiineter of tbe tiiil vmy c-onsidcraldy, some Wiug 

 (juite slender and others (jaire lohust. Of the sUMnh'r-tailed toiins, two 

 (8-'.»S and 1188) are niah's. The sex of tlie othrrs is nnknnwn, hnt I 

 Husi)ect the specimens with thiek tails to be females. The U'lij^ths ai»* 

 as follows : I. B. c. constrictor: 8 ^ in total h'nj^th, No. 8208 ; ;i'|, IU7; 

 ^, lUtO; IVl, I7(U, U48; Ir, 71t>4, 1788, 44U ; i^, KMmO. /;. r. flarircn- 

 trie: 3^, 107] 7; ^, 12588; 3i, 4418; ;i^, 2l;i2; 4, ITU ; 4,',,, 7812; 4|\, 

 7812/;; 4r;, 12581. 



Bascanium piceum Copf. 



Ildnciininm fhvjillil'urine i)iccuin ('ope, in Viirrow's Jiept. IT. S. (J. (J. Siirv. W. of lOOth 

 Mcr.. l-^T.'i, v., p. ()17 (name only); Check liist N. Aiikt. Hatr. Kept., IrtT.'., ]>. 10. 



Form elongate, tail 3^; times in the total length. Head elongate, 

 muzzle mirrowed forwards, moderately i)rotiii»eranl, not liattrnrd, 

 slightly deeurved. Kostral plate slightly recurved above; intrniasuls 

 longer than wide. Frontal half as wide as snpereiliaries behind. Piiri- 

 etals openly truneato emarginate at jmsterior margin. Lorral large, 

 larger than high. Temporals 2-2-2. Superior labials 8, fourth and liftli 

 bounding orbit, sixth sul)triangular, seventh and eighth larger aiul 

 nearly e(pial, and longer than high. Inferior labials 10, lifth longest; 

 postgeneials not longer than pregeneials. Scales in nineteen longitu- 

 ilinal rows, moderatel.y narrowed. 



Gastrosteges, 195; anal, 1; urosteges, 108. Total length, 1,203 mil- 

 limeters; the tail, 355 millimeters; vnd of muzzle to rictus oris, 34 

 millimeters. 



Color above, to and imduding the extremities of the gastrosteges, 

 black. Inferior surfaces, light yellow; the anterior (ifth of the length 

 with brownish blotches, which are posteriorly few and distant, but be- 

 come larger aiul more ap[)roximaled, until the anterior thirty to forty 

 gastrosteges are brown or anteriorly bla(;k, like the supi'rior surfaces. 

 Labial plates with some pale shades in their middh's. IMeocular with 

 alight middle; postoculars black. Top of head a little i)aler than back. 



This form might be regarded as a melanistic li. JtaijcHiformc but for 

 the im-reased number of scale rows and longer tail. The fact that the 

 inferior surfa(;e does not generally take part in the darkem-d color in- 

 dicates a normal color type. 



liascaiiium piceum Cope. 



Catalogue No. of Lornlity. From whom f^h„„^,„. 



No. spcfiiiii'i). •' rcrcivcfl. 



7891 I < tmp Grant, AriBOtin 



Bascauiiim flagel iforme C.itesby. 



Haacanium flagclliformejlagetli/orme Copo, Check List Uatr. Kept. N. Amor., 1875, p. in. 

 AiKjuit Jhgeilliformia CatosVi., Nat. Hist. Coral, ii. I7i:i, p. r>4. PI. i.iv. 

 Coluber Jliiiji II inn Shaw, fJoii. Zool., in, IHO-J, y. 47.">. 



Coluber llaneUi/onnis Holln.. N. Amut. Ilerpot, I. IKUJ, p. I(i7,ri. \i.\: (iarmau, Mem. 

 Mils. Conip. Zool. Cainhr.. viii, lKS:i, p. 1 17. 



Proc. N. M. 01 1(» 



