MORGAN HEBARD 



97 



locality in central Florida being in the area of intergradation 

 between the races of hrevipenne. Blatchley's experience with 

 the present species has been almost wholly with material from 

 Dunedin, another locality in the area of intergradation, where 

 strong individual variation is often found. His statement 

 that ''All distinctions as given are comparative only and may 

 be found in any large series of specimens taken almost any- 

 where in Florida" is correct in the first part, but erroneous in 

 the second. Both races are individually variable, but any 

 series from southern Florida may be easily separated from any 

 series from the northern portions of the species' range. 



The dorso-external spines of the caudal tibiae vary in number 

 from sixteen to twenty in the material before us, the average 

 being eighteen. 



The following measurements are given to show the differences 

 in proportions found in hrevipenne hrevipenne, atypical hrevipenne 

 and hrevipenne peninsulare. 



* These measurements and the proportions given below the tables were 

 taken by micrometer. 



' This series is decidedly depauperate, the proportions, however, being 

 typical of h. peninsulare. 



TRANS. AM. EXT. SOC, XLVUI. 



