196 PROCEEDINGS OF THE ACADEMY OF [April, 



Billy's Island, V, 16, 1915, (H.), 1 9 ; South Jacksonville, IX, 7, 1913, (W. T. 



VI-VII, 1912, (J. C. Bradley), 1 d\ Davis), 1 9 . 



1 9 . Ortega, Duval County, IX, 6, 1913. 



Honey Island, VI, 1, 1912, (J. C. (W. T. Davis), 1 9 , 1 juv. 9 . 



Bradley), 1 9. Atlantic Beach, VIII, 24, 1911, (R. & 



Chase Prairie, IX, 5, 1913, (J. C. H.), 6 <?, 3 9, 1 juv. d\ 4 juv. 9 . 



Bradley), 1 juv. 9 . Pablo Beach, IX, 5, 1913, (W. T. 



Davis), 1 tf. 



Florida. Baldwin, III, 7, 1879, (E. A. Schwarz), 



Jacksonville, VIII, 1885, (W. H. Ash- 1 <?, [U. S. N. M.]. 



mead), 1 d\ (T. J. Priddey), 1 9, Enterprise, V, 24 and 25, 2 <?, [U. S. 



[all Hebard Cln.]. N. M.j. 



The usual increase in size southward is less marked in this species 

 than is generally the case, and then only in the female sex. In both 

 sexes any geographic size tendencies are discounted by the very 

 great individual size variation, the extreme males of the Atlantic 

 Beach series, for instance, measuring as follows: 



The angle of the fastigium, while individually variable, is as a 

 rule more acute in the more southern specimens than in the others, 

 say from Raleigh, North Carolina. The young from Ashley Junction 

 represent the four instars preceding maturity, while those from 

 Greensboro lack the last two stages. From the evidence in hand it 

 seems that, over at least a considerable portion of its range, this 

 species occurs in an adult condition throughout the year. 



The greenish color phase is more in evidence in the young than in 

 adults, but the Honey Island females are quite greenish, the Billy's 

 Island females similar, but to lesser degree. A medio-longitudinal 

 line of purplish or pinkish is indicated more or less distinctly in the 

 greater portion of the young. 



This marsh and swamp-loving species generally frequents tall 

 grasses and reeds in the situations preferred by it, but occasionally 

 has been taken (Wilmington) in high bushes on the edge of a gum 

 swamp.* The wet spots in pine woods are much frequented by it. 



Individual Variability and Dimorphism in Schistocerca alutacea and 



obscura. 



The authors have in their hands a series of over five hundred 

 specimens belonging to these two species as understood by them. 

 The form for which Scudder used the name obscura 65 is well separated 



65 Proc. Amer. Acad. Arts and Sci., XXXV, p. 465, (1899). 



