1912.] 



NATURAL SCIENCES OF PHILADELPHIA. 



269 



These specimens show but little variation in size and almost none 

 at all in coloration. The nymphs are easily recognized by the 

 striking dark median bar and the very narrow fastigium. The present 

 records carry the known range of the species out over the Keys, 

 while it has been recorded from as far north as Tampa. 



Both at Miami and Homestead the high grass on the everglades 

 was swarming with nymphs of this species in all stages of development, 

 but the few adults were secured only after strenuous and long- 

 continued beating, and all proved to have reached maturity very 

 recently. In this region the great majority of the individuals of 

 this species probably reach maturity during the first part of April. 



Atlanticus glaber n. sp. 



This fine species differs from its nearest relative, Atlanticus gibbosus, 

 in having a proportionately longer pronotum with the disk trans- 

 versely more convex and subequal in width throughout, the caudal 

 margin much narrower and more sharply 

 rounded. The lateral carinae of the 

 pronotum differ in being parallel and of 

 equal intensity throughout, while the 

 median carina is faintly indicated 

 throughout and more pronounced on the 

 metazona. The caudal margins of the 

 lateral lobes of the pronotum are much 

 less sinuate. The abdomen above is 

 much more distinctly tricarinate and the 

 posterior femora are shorter and much 

 less swollen on the basal half than in any 

 other species of the genus. The cerci of 

 the male are not at all like those of 

 A. gibbosus, they somewhat resemble 

 those of A. pachymerus, but are much 

 stouter. 



Type; c? : Miami, Dade County, 

 Fla., on narrow arm of the everglades 

 sparsely overgrown with knee-high marsh 

 grasses, March 28, 1910. (Hebard.) 

 [Hebard Collection.] 



Size not as large as A. gibbosus. Body 

 slender and compressed for the genus. 

 Head moderately large; fastigium broad, 

 rounded, broader than first antennal 



Fig. 20. — Atlanticus glaber 

 n . sp . Dorsal view of type. 

 (X li) 



