244 PROCEEDINGS OF THE ACADEMY OF [April, 



this is true to a moderate degree, the large amount of material now 

 at hand shows that environmental differences have a more decided 

 effect. The table of measurements gives the normal dimensions 

 of material from different portions of the range of this race; certain 

 series before us are decidedly smaller than is usual, this differentia- 

 tion being apparently due to environmental conditions, this size reduc- 

 tion is shown by material from Macon, St. Simon's and Cumberland 

 Islands, Georgia, and to a less extent in the series from Tybee 

 Island, Georgia. In these series males average about 22 mm. and 

 females about 26 mm. in length. 



Measurements (in millimeters). 



Caudal Length of 



Length width of Length of caudal 



'<? cf of body. pronotum. tegmen. femur. 



Winter Park, N. C (6) 102 23.5-25.7 2.9-3 18-19.4 12.8-14.8 



Currahee Mountain, Ga. (8) 20.1-23.8 3-3.3 18-19.2 13.6-14 



Jesup, Ga (4) 22.3-23 2.8-3 18.2-19.9 13.7-14.3 



Atlantic Beach, Fla (10)19.4-27.2 2.8-3.4 18-21.4 13-15.1 



Miami, Fla (13)23-24.9 3.1-3.3 21.2-22.8 15-15.3 



Dallas, Texas (1) 25 3.3 20 15.2 



Houston, Tex (1) 25.6 3.3 19 14.8 



9 9 



Winter Park, N. C (11)28.2-32.5 3.8-4.1 20-22.3 15-17.7 



Currahee Mountain, Ga ..(3) 25.8-28.7 4-4.2 19.4-21.7 15.8-16.8 



Jesup, Ga (4) 26.3-30.3 3.8-4.6 20.4-24 15.4-17.4 



Atlantic Beach, Fla (8) 29-29.9 4-4.5 21.7-23 17.5-18.2 



Miami, Fla (13)29.6-35.5 4.1-4.4 23.5-26 17.3-18.8 



Houston, Tex (1) 30.7 4.3 21.4 16.9 



The synonymy of Scudder's M. deletor with the present insect has 

 been discussed and established by the authors. 103 



Many of the specimens here recorded are very dark in general 

 coloration, with the lighter areas of the caudal femora cinnamon color 

 and very striking; the series from Winter Park, North Carolina, 

 composed wholly of such specimens, is particularly brilliantly marked. 

 A few pale brown specimens have the markings of the caudal femora 

 subobsolete and suggest in appearance large and very heavy specimens 

 of M. femur-rubrum. 



Melanoplus furcatus Scudder. 



Billy's Island, Georgia, VI-VII, 1912; Jordan's, Billy's Island, Ga., VIII, 31, 

 IX, 1-5, 1913, (J. C. Bradley), 1 cf, 1913, (J. C. Bradley), 1 juv. 9 . 



4 9, 2 juv. <?. Honey Island, Ga., VI, 1912, (J. C. 



Bradley), 1 juv. d". 



102 The figures in parentheses indicate the number of specimens measured 

 from each locality. 



103 Proc. Acad. Nat. Sci. Phila., 1907, p. 296, (1907). 



