474 VIPERID 2. 
border of the nostril, its vertical diameter equal to or less than its 
distance from the mouth. Rostral as deep as broad or slightly 
deeper than broad, visible from above, in contact with one, rarely 
with two apical shields; distinct frontal and parietal shields, the 
former once and a half to once and two thirds (rarely once and one 
third) as long as broad, as long as its distance from the rostral or 
the end of the snout, and nearly always longer than the parietals ; 
supraocular well developed, separated from the frontal by one to: 
three shields; 6 to 10 scales round the eye, usually 8 or 9, the 
upper preeocular usually in contact with the nasal; a single series. 
of scales between the eye and the labiuls; nasal single, separated 
from the rostral by a naso-rostral; temporal scales smooth ; 6 to 9 
upper labials, usually 7 or 8; 3 (rarely 4) lower labials in contact 
with the chin-shields. Scales in 19 (rarely 20 or 21) rows, strongly 
keeled on the back, less strongly on the sides, outer row smooth. 
Ventrals 120-135 in ¢, 125-142 in 9 ; anal entire; subcaudals. 
30-37 in ¢, 20-28 in 2. Yellowish or pale brown above, grey 
or dark brown on the sides, sometimes uniform brown; a vertebral 
series of more or less regular, transversely oval, elliptic or rhom- 
boidal dark brown, black-edged spots, some or all of which may 
be confluent and form an undulous or zigzag band; two or three 
longitudinal series of dark brown or black spots along the sides, 
the lowermost on the outer row of scales; small dark spots and 
one or two /\-shaped markings on the upper surface of the 
head; an oblique dark stripe from the eye to the angle of the 
mouth ; rostral and labials uniform white, rarely with a few small 
blackish spots, or with brownish borders; chin and throat yellowish 
white, rarely with some blackish spots; ventrals and subcaudals 
black, with transverse series of small white spots, grey, checkered 
with black and white, or whitish with small round black spots; 
tail but rarely tipped with yellow. No sexual differences of 
coloration, 
Total length: ¢ 420 millim.; tail 55. 9 500; 50, 
8.E. France (Basses-Alpes) ; Italy (Abruzzi); Istria (Veglia Id.); 
Mountains of Bosnia; Plains of Lower Austria; Hungary. 
a. 2 (V. 184; C. 25).  Basses-Alpes. _ M.E. Honnorat [P.}. 
b-g,h. 3 (V.180, 181, Laxenburg, near Dr. F. Werner [E.]. 
126; C. 33, 30, 35) Vienna. 
& 9 (V. 134, 183, 
134, 182; C. 24, 25, 
26, 27). 
i, k. Many specimens, Laxenburg. Hr. F, Henkel [E.}. 
3d (V. 120-135 ; C. 
30-37) & 9 (V.125- 
142; OC, 20-28). 
i. 2 (V. 134; ©. 24). — Parndorf, near Bruck. Hr, F. Henkel [E.]. 
m. 9 (V. 187; C. 24). nae, near Buda- Prof. L, v, Méhely [E.]. 
est. 
n. 2 skull. Laxenburg. 
