NATURAL SCIENCES OF PHILADELPHIA. 129 



I. Scales in twenty-seven rows, keeled. 

 Gastrosteges from 200 to 20 9 ; five or six lateral rows 



smooth ; yellow with black end of tail melanura. 



Gastrosteges 169 — 189, nine or more lateral rows smooth ; 



brown with rows of brown spots ; tail not black.... pardalis. 



II. Scales in twenty-one — five rows. 

 a.. Scales keeled, a larger dorsal row ; 



Gastrosteges 168; scales in twenty three rows; gray 



with small dorsal spots cana. 



a.m. Scales smooth, dorsal rows equal. 

 Short, stout, gastrosteges 142 — 150; head lanceolate; 

 scales in 23 — 25 rows ; brown or gray with usually 



dorsal and lateral spots maculata. 



Long slender, head small lanceolate; gastrosteges 202 — 

 5 ; scales 21 — 3 rows; yellow with nearly complete 



broad brown rings or half rings semicincta. 



Long slender, head broad short; gastrosteges 211, scales 



25 rows; brown with six rows of black spots dipsadina. 



The normal number of postoculars in this genus is three, but variations 

 are not unfrequent. Thus a specimen of U. maculata has but two postoc- 

 ulars on each side, another has two on one side only. Another has a com- 

 plete circle of five scales round the eye on one side, and three postoculars on 

 the other. I have seen no specimen with two preoculars as in the specimen 

 figured by Jan as T. disfinctus, but as the species does not appear otherwise 

 different from U. maculata, I suspect that this character also falls within the 

 range of the variations of the latter. 



Ungalia melanura Gray, Boa, Schlegel. 



1 here are two varieties of this species. 



a. A narrow brown vertebral line; crown not spotted; [Wotophis bicarinalux 

 Hallow.), three specimens from Cuba, two of them from the east ; one with 

 two keels on the vertebral row, the others with one. 



/?. [Boa melanura Schleg.) Two dorsal series of brown and gray spots, top 

 of head much spotted. Five sp. from Cuba. 



Ungalia pardalis. Boa Pardalis Gosse, Ungalia maculata Gosse. 



Var. a. Shorter, gastrosteges 169; eight rows of spots, belly blotched. 

 One sp. from Jamaica (Adams coll.) Smithsonian, 5763. 



/?. U. bucculenta Cope. Larger, gastrosteges 186 — 9; four rows of 

 spots, dorsal pairs much confluent, belly specked ; head swollen behind. Four 

 specimens from Navassa Id. Mus. Smithsonian. The largest of these 

 measures 25 inches in length. 



Ungalia cana Cope, sp. nov. 



This species is intermediate between the U. pardalis and U. m a c \i I a t a 

 in many respects. Superior labials ten, all higher than long ; orbitals 1 — 3. 

 Internasals longer than broad ; prefrontals broader than long ; postfrontals 

 pentagonal, nearly equal sided. Temporals 3 — 3 — 4. Scales, except six exter- 

 nal rows, weakly carinate. Muzzle narrow, acuminate, head rather wide be- 

 hind ; diameter of eye a little over twice in length muzzle. Total length 13 

 in. 9 lin. ; tail 16-5 lines. General form neither very stout nor slender. 



Color gray brown above, below yellowish gray, densely punctulated at 

 middle of gastrosteges. A series of tolerably approximated transverso-dorsal 

 spots, which are short, and little distinct, in some specimens almost wanting. 

 On each side on the third row of scales is a series of black dots two or three 

 scales apart. A brown band from eye to side of neck, the labials below it 

 yellowish ; mental region yellowish. 



Several specimens from the Bahama Island of Inagua sent to the Smith- 

 sonian. 



1868.] 



