HERPETOLOGY OF PORTO RICO. 695 



Only two coronelline genera occur in Porto Rico, both of which are 

 very much alike. They may be easily distinguished by the presence 

 or absence of paired pores, or round translucent spots, near the apex 

 of the dorsal scales. In the present genus there is occasionally found 

 a single, more or less obscure, pore, but in the genus Alsophis the pair 

 is very much in evidence, and can usually be seen with the naked eye. 



Two species occur within our territorial limits, the chief distinction 

 of which is the number of subcaudal shields. They may be identified 

 as follows: 



a 1 Ventrals more than 150 (151-159) L. stahli, p. 695. 



a 2 Ventrals less than 150 (134-146) L. exiguus, p. 698. 



LEIMADOPHIS STAHLI," new species. 



1876. Dromicus parvifrons Peters, Mon. Ber. Berlin Akad. Wiss., 1876, p. 708 

 (Porto Rico) (not of Cope). — Gundlach, Anal. Soc. Espan. Hist. 

 Nat., X, 1881, p. 312 (Porto Rico).— Stahl, Fauna Puerto-Rico, 1882, 

 pp. 70, 100 (Porto Rico). 



Diagnosis. — Tail less than four times in total length; supralabials 

 eight, three entering orbit; scale rows, 19; ventrals, 151 to 159; sub- 

 caudals, 83 to 97 pairs. 



Type-— r.S.N.M. No. 27323; Bayamon; Dr. A. Stahl, collector. 



Habitat. — Porto Rico. 



Description of type specimen. — Adult; U.S.N.M. No. 27323; Baya- 

 mon, Porto Rico; 1900; Dr. A. Stahl, collector. Rostral much 

 broader than high, scarcely visible 

 from above; internasal suture shorter 

 than prefrontal suture; frontal longer 

 than its distance from end of snout, 

 shorter than parietals, widely sepa- fig. lei.— leimadophis stahli, type. 

 rated from preocular; supraocular 1^^%^ ^ ° f hea<L No< 

 narrower than frontal; nasal divided, 



longer than its distance from eye; loreal small, as high as broad, 

 pentagonal; one large preocular; two postoculars; one large anterior 

 temporal followed by two smaller ones; eight supralabials, second in 

 contact with posterior nasal, loreal, and preocular; third, fourth, and 

 fifth supralabials in contact with eye; eight lower labials, four in con- 

 tact with anterior chin-shield, two in contact with posterior; anterior 

 chin-shields much shorter than posterior ones; scales smooth, without 

 pores, in 19 rows; ventrals, 157; anal divided; 89 pairs of subcaudals. 



Color pattern : On a brownish ground a narrow dusky lateral line 

 covering the adjacent edges of the fourth and fifth scale-rows; above 

 this line a pale longitudinal band covering the remaining part of fifth, 

 the whole of sixth, and other half of seventh rows; a median dorsal 



"Dedicated to Dr. A. Stahl, of Bayamon, the venerable Porto Rican patriot ami 

 naturalist, from whom I received the type specimen. 



