144 OPHIDIA. 
I have seen two specimens—the type, which is 17 inches long, the tail measuring 
5 inches, and a larger one from Nicaragua, 24 inches long. 
Addendum to page 107. 
HENICOGNATHUS. 
The following new species has been received quite recently, since the publication of 
the part containing the account of Henicognathus, and may find an appropriate place at 
the end of the Aglyphodont Colubrines. 
2. Henicognathus venustissimus, sp. n. (Tab. LI. fig. C.) 
Hab. Nicaracua, Matagalpa, Hacienda Rosa de Jerico 3250 feet (Rothschuh). 
Form of the body and head as in Coronella annulata, but with a stronger and longer 
tail. Frontals together a little shorter than the vertical, which is nearly as long as an 
occipital. Loreal rhombic; one preocular, just reaching the upper surface of the head ; 
two postoculars, both in contact with the occipital. Temporals 2+2. Nine upper 
labials, the fourth, fifth, and sixth entering the orbit. Chin-shields nearly of the same 
length. Scales in 17 rows. Ventrals 145; anal divided. Maxillary teeth of equal 
size, small, 43 in number. Coral-red or reddish-olive, with more or less irregular, 
broad, black, white-edged rings. The black rings encroach but slightly upon the 
abdomen. Head and neck black, with a broad white interocular band; the anterior 
two black body-bands are complete, but the following (eight or nine in number) are 
broken in the middle of the back; they are complete again on the tail. Hach scale of 
the red spaces with a black tip. Lower parts whitish, with some blackish spots, 
irregularly crowded towards the sides of the abdomen. Each subcaudal with a large 
black spot. 
I have seen two specimens, both with mutilated tails; the larger measures 17 inches, 
without tail. 
