526 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM 



1 Greatest. 



* Least. 



• Average. 



Our figure of 70 of these (pi. 115) shows how constant they are in 

 characters. I have taken 70 specimens at random to convey the idea 

 of the constancy of characters in the race caniceps, a constancy that 

 holds equally good in the case of the races of Cochlostyla (Chrysallis) 

 aspersa, nigriceps, etc. I call particular attention to this in order that 

 it be understood that I am not dealing with selected specimens but 

 with races of well-defined species. 



