HEEPETC^LOGY OF PORTO RK'O. 



695 



Onlv two ooronollinc .en era occur in Porto Rico, both of which are 

 very inu.-h alike. Thev may be easily disting-uishcd by the presence 

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

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

 asinole more or less obscure, pore, but in the genus AIs<.j>/us th,^ ptiir 

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

 ■ Two species occur within our territ..rial limits, the ciiiet distinction 

 of whic4i is the number of subcaudal shields. They may be id.mtihed 

 as follows: 



a^ Ventral, more than 150 (151-159) - -^- ':'"''''' j'' ;:;'^- 



a^ Ventrals less than 150 (134-146) '^ '■'■'^>""'' l'' " ' " 



LEIMADOPHIS STAHLI," new species. 



1876. Dronuc. parrifron. Pkters, Mon. Ber. Berlin Akad. AViss., 1876, p 708 



(Porto Rieo) (not of Cope).-(kiNi)LAcn, Anal. ^ov. Kspan. Hist. 



Nat., X, 18S1, p. :U2 (Porto Rico).— Stahl, Fanna Pnerto-Rico, 1882, 



l)p. 70, 160 (Porto Rico). 



Diaanosh —Tail less than four times in total length; supralabials 



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



cjuulals, 88 to 97 pairs. . .. x,i i, ^ 



7^y^^,,.__l^.S.N.M. No. 27328; Bayamon; Dr. A. Stahl, collector. 



JMltat.—Vovto llico. 



Desariftion of U,pe specimen. ^ Adult; U.S.N.M. No 2.328; Baya- 

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

 broader than high, scarcely visil)le 

 from abovi^; internasal suture shorter 

 than prefrontal suture; frontal longer 

 than its distance from end of snout, 

 shorter than parietals, widely septi- 

 rated from prcocular; .supraocular 

 narrower than frontal; nasal divided, 

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

 pentouonal; one large preoi-ular; two postoculars; one large anterior 

 tempo'ral followed 1)V two smaller ones; eight supralabials. second in 

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

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

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

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

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

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

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

 this line a pale longitudinal ])and coviu-ing the remaining part of htth 

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



«r)e.licate.l t.. Dr. A. Stahl, of Bayamon, the venerable Porto Rican i>atriot and 

 natnralist, from whom I received the type specimtMi. 



Fk;. 161.— LEIMADOPHIS STAHI.I, type. 

 ■1 X natural size. Side of head. No. 

 •J7323, U.S.N.M. 



