1916.] NATURAL SCIENCES OF PHILADELPHIA. 145 



In the latter lot the proportionate difference in this respect between 

 the sexes is slight. Here, as in femoratus, it is possible that immediate 

 environment is the responsible factor for the development of the 

 caudate type or the alternative abbreviate one. 



In south and central Florida this species varies away from the 

 more northern type in the slightly more compressed form, the break- 

 ing up of the usually linear, strumose pronotal ridges into less elongate 

 scabrosities, while in the abbreviate individuals the caudal process 

 of the pronotum is more acute. The importance, even relatively, 

 of these differences is discounted when we examine the entire series 

 before us and find that specimens from Sullivan Island, South Carolina, 

 and Wrightsville, North Carolina, are as compressed as the south 

 Florida individuals, while representatives from other Carolina localities 

 are no more strongly strumose, and just as angulate caudad on the 

 pronotum, as in the south and central Florida material. The width 

 of the fastigium and the tegminal length and width vary so individu- 

 ally in a series from any locality, that no diagnostic weight can be placed 

 upon any of these features. In the strongly accentuated condition this 

 species occurs in northern Florida and southern Georgia, north and 

 south of which a certain portion of the material is less strikingly 

 marked, although a large part or the larger part is decidedly typical 

 of the species, but in all of the specimens examined the recognition 

 of the material is not difficult, except in the case of south and central 

 Florida individuals. With these, however, we feel that the characters 

 given in the key will enable the student to separate bolteri from 

 femoratus. Doubtless environment is responsible for most of the 

 differences mentioned above, as it probably is to a degree for size 

 difference, but in this there is much of an individual character, as 

 material from the same environment at the same locality shows. 



The variation in the form of the frontal costa found in femoratus 

 is parallelled in the present species, the regularly diverging type being 

 the normal form, the scutellate type the exception. The coloration 

 varies as in femoratus, but as a rule to a lesser degree. 



The range of this species in the southeastern States is now known 

 to extend from Petersburg, Virginia, south to Key West, Florida, west 

 to Pensacola Bay (Warrington and Fort Barrancas), Florida, and in- 

 land as far as Spring Creek, Georgia, and Fayetteville, North Carolina. 

 It is thus seen to be limited to the Lower Austral, Sabalian and Sub- 

 tropical zones, probably ranging to eastern Texas and certainly up 

 the Mississippi Valley as far as southwestern Indiana. Previous to 

 this writing bolteri was only known from Florida. 



