194 THE HERPETOLOGY OF CUBA. 
one do so during midday, although we have found many specimens under rocks 
by day, which we would surely have seen long before had they come forth to 
breathe. By night they move about slowly in the water or lie in wait for their 
prey, usually eyprinodonts, called in Cuba Guajacones, and then with the aid 
of a light they may easily be collected. The natives in general have no fear of 
this snake, and they have frequently told us that they have often felt them 
swim against their legs while fording a river at night. Nothing whatever is 
known of their breeding habits. With a single exception they have not been 
observed on land for even a short time. In April 1917 Mr. W. 8. Brooks while 
digging in a cave in the Sierra de Casas, Island of Pines, caught a very small 
and young specimen; it was about eight inches long and more pallid in colour 
than an adult. The cave was half a mile or more from the nearest small 
stream and possibly had been resorted to for oviposition. Specimens a meter 
in length are decidedly larger than the average. 
The species is very widespread and fairly abundant in the rivers and streams 
about Guane, especially the Rio Cuyaguateje, in the streams about Pinar del 
Rio and San Diego de los Bafios, in the Lake and Rio Ariguanabo at San An- 
tonio de los Bafios, in the streams about Cienfuegos, in the Rio Tana at Man- 
zanillo, and in the waters near Guantanamo. The species is the only one of the 
genus which occurs in the Antilles, although there are several species on the 
mainland ‘occurring from Upper Central America to Ecuador. 
61. ALSOPHIS ANGULIFER (Bibron). 
Plate 15, fig. 7. 
Jubo; Culebra. 
Diagnosis: — A large, active terrestrial snake, usually slate coloured with 
black spots. The black spots scattered and usually confined to a single scale. 
Description: — Adult M. C. Z. 2,195. Cuba (a cotype Mus. Hist. Nat. 
Paris). 
Rostral much broader than high, barely visible from above; internasal 
suture about equal to the prefrontal suture; frontal broader anteriorly, nar- 
rower posteriorly than the supraoculars, a little longer than its distance from 
the tip of the snout, shorter than parietal suture; nostril large, between two 
large nasals; loreal medium, slightly longer than high; one preocular, not in 
contact with frontal; two postoculars, about equal in size; temporals one 
plus two; eight supralabials, third, fourth, and fifth in contact with eye; fifth 
