ZOOLOGY. 
295 
doubt, like the ugly but useful toads, more useful than ornamental, as their food consists 
chiefly of insects. 
As might be supposed from the locality, the specimens found in Washington Territory are 
smaller than those from Oregon and Utah. 
I never saw nor heard of its occurrence west of the Cascade mountains. — C. 
This animal was found by me at Fort Benton, on the Upper Missouri, and again on the plains 
west of the Rocky mountains, as far as the Cascade range. 
One was caught in September, near the Snake river, Oregon Territory. At Christmas, 
although having been shut up since its capture in an empty match box, it was still quite lively. 
When irritated it would spring in a most threatening manner at anything pointed at it, at the 
same time opening its mouth widely, and audibly kissing, after which it would inflate its bod}^ 
and show other evident m.arks of anger. It died about February 1, probably from starvation, 
as the heat of the house prevented torpor, and there were no insects upon which to feed it. — S. 
Crotahis ladfer, Baird & Girard, Proc. Acad. Sc. Phil VI, 1852, 177.— Ibid Cat. N. A. Pieptilcs, 1853, 6.— 
GiRAED, IT. S. Expl. Exped. Herpetology, 187, pi. XV, figures 1 to 6. 
Sp. Ch. — Dorsal rows of scales, twenty-five ;• exterior one smooth. ; second and third obsoletely carinated. Tail and poste- 
rior part of body with fifteen to twenty half rings. A series of dortal hexagons or octagons, also two small irregular series on 
each side. A light stripe from the supra-ocular crosses the angle of the mouth on the third and fourth scries of supra-lahials. 
A specimen of this rattlesnake shot in the Yakima valley agreed very Avell Avith the descrip- 
tion given by Baird and Girard in their Catalogue of Reptiles. Another, however, killed about 
September 25, in latitude 48°, on the Columbia river, was of a pure white ground color with 
beautiful bright sea-green blotches on the back. It had probably just changed its skin and had 
not acquired its permanent brown or yellow ground color with dark brown blotches. 
Rattlesnakes are much less numerous north of the Columbia than south, these two being all 
I met with in two months' travelling through the interior. None are found west of the Cascade 
range, except an occasional straggler carried down the Columbia river. — C. 
Specimens vary in the ground color from white to yellowish brown. The spots vary from 
greenish to chestnut brown. In the young a light stripe crosses the vestae between the supra- 
orbital scales, and another connects it with the ash-color of the back of the head. 
One specimen was killed, from the mouth of which three young ones were said to have 
Found from the Dalles up the Columbia and Snake river. At the Dalles they are so numerous 
as to be very annoying, having been known to enter dwelling houses. Since the introduction 
of hogs in the vicinity they seem to have diminished. The Indians use the tail of the rattle- 
snake as a medicine to produce abortion. — S. 
Serpents. 
CROTALUS LUCIFER, Baird and Girard. 
Tlie Western Rattleswalce. 
escaped. 
CROTALUS CONFLUENTUS, Say. 
Prairie Rattlesnake. 
Plate XII. 
Crotalus conjluenlus, Say in Long's Exped. Rocky mountains, II, 1823, 28. 
C'roialus confluenlus, B. & G. Cat. N. A. serpents, p. 8. 
