34 CADUCIBRANCHIATA. 



While the above is exceedingly valuable, and to some 

 would be all that could be desired, it is probable that 

 the following will be more serviceable to most persons 

 in the determination of species. 



Spots large, very different from the usual color, (a) 

 Spots none, minute, or nearly uniform with the ground 

 color. (1) 



a. Plantar tubercles two. (h) 



a. Plantar tubercles indistinct or none, (b) 



b. Costal grooves 14, vomerine series of teeth 



two. (f) 

 b. Costal grooves 12. (e) 

 b. Costal grooves 11. Vomerine series of teeth 



3-(c) 

 b. Costal grooves 10, vomerine series of teeth 3. 



TALPOIDEUM. (5) 



c. Color black: spots or bands large: medi- 

 an series of teeth concave behind or 

 straight, (d) 



c. Color plumbeous: spots small: median se- 

 ries of teeth convex behind. 



conspersum. (12) 



d. Back with transverse bands of gray. 



opacum (2) 



d. Back without transverse bands or gray. 



PUNCTATUM. (i) 



e. Vomerine series of teeth 3 : canthus ros- 

 tralis distinct : back with a gray line. 



MACRODACTYLUM. (7) 



e. Vomerine series of teeth two: can- 

 thus rostralis none: no gray dorsal 



line tenebrosum. (9) 



f. Canthus rostralis wanting, (g) 



