248 COLUBRID, 
anterior temporal. Body cylindrical; scales smooth, without pits, 
in 17 rows; ventrals rounded, Tail very short, obtuse; subcaudals 
in two rows. 
Tropical Africa. 
1. Xenocalamus bicolor. 
Xenocalamus bicolor, Giinth. 1. c. p. 415, pl. xix. fig. A. 
Upper portion of rostral nearly half as long as the frontal, which 
is extremely large and more than half as long as the shielded part 
of the head; internasals large, forming a short median suture; 
supraocular very narrow ; a large, elongate prewocular, in contact 
with the posterior nasal, the internasal, the frontal, and the third 
labial ; a minute postocular; a single temporal ; six upper labials, 
first very small, third and fourth entering the eye, fifth very large 
and in contact with the parietal; third lower labial extremely large ; 
a single pair of narrow chin-shields, in contact with three lower 
labials. Scales in 17 rows. Ventrals 218; anal divided; sub- 
caudals 24, Black above; upper lip, two outer rows of scales, and 
lower parts white. 
Total length 430 millim.; tail 30. 
Zambesi. 
a. 2 (V. 218; C. 24). Zambesi. Mr. Chapman [C.]. (Type.) 
2. Xenocalamus mechovii. 
Xenocalamus mechowii, Peters, Sitzb. Ges. Naturf. Fr. 1881, p. 147; 
Boettg. Ber. Senck, Ges, 1888, p. 47. 
As in the preceding, but supraoculars absent and usually two 
postoculars instead of one. Ventrals 229-239; anal divided; sub- 
caudals 31-36. Yellowish, with large dark brown spots above; 
some of these spots are disposed in alternating, partly confluent 
pairs, others form cross-bands; upper lip, sides, and lower parts 
unspotted. ; 
Total-length 225 millim.; tail 23, 
Congo. ; 
a. Hgr. (V. 289; C. 365). Stanley Falls. 
196, MICRELAPS. 
Micrelaps, Boetty. Ber, Senckenb. Ges, 1879-80, p. 186. 
Elaposchema, Mocquard, Mém. Cent, Soc. Philom. 1888, p. 122. 
Maxillary very short, with two teeth followed, after an interspace, 
by a very large grooved fang situated below the eye; anterior 
mandibular teeth longest. Head small, not distinct from neck ; 
eye minute, with round or vertically subelliptic pupil; nostril in a 
single nasal ; no loreal ; no preocular; prefrontal entering the eye. 
Body cylindrical; scales smooth, without pits, in 15 rows; ventrals 
rounded, ‘Tail short; subcaudals in two rows, 
Palestine ; Somaliland. 
