CROTALIDA. 75 
TWENTIETH GENUS—CROTALID® (Pit Vipers). 
It is made up of the following species, viz.: 
ya 
Varieties. 
‘1. Trimeresurus, . . a) 
2. Peltopelor, e x al | Thdia: 
8. Halys,. 2. 2 » » s 0B 
4. Hypnale, . 1 | 
5. Crotalus, . - 8 United States. 
( 9 iz; 
| 1 Mexico. 
‘ 6. Caudisona, . . . . 1 New Mexico. 
Crotalide. : 1 Venezuela. 
(11 species 1 Guiana and Brazil. 
and 39 va- {1 es “Mexico. 
rieties.) 7. Craspedocephalus, . 3 2 Brazil,1 Martinique. 
8. Fasciatus,. . . . . .38 U.S. of Colombia. 
9. Crotaphopheltusrufescens, 1 South Africa. 
10. Calloselasma rhodostoma, 1 Java and Siam. 
11. Crotalophorus miliaris, . 1 Asia (Kuhl). 
L Total,. . . . 89 varieties. 
Of this genus the only species found in India that has the 
vestige of a caudal appendage is the Halys; and in this it is 
reduced to a simple horny spine or point. 
First Species—CROTALUS TRIMERESURUS, is made up of— 
No. 1. Crotalus Trimeresurus gramineus, — Giiinther. 
af erythrurus, St 
ss carinatus, a 
oy anamallensis, te 
es monticola, ee 
ny strigatus, " 
mucrosquamatus, “ 
Andersonii, fe 
Crotalus Trimeresurus.—Although the individuals of this 
species are fierce and venomous, yet few deaths are ascribed to 
