1912.] NATURAL SCIENCES OF PHILADELPHIA. 257 



All of these .specimens were taken in the grasses of the everglades. 

 At this time of year colonies of these, each usually numbering several 

 dozen, may be found in such places, all close to the spot from which 

 they have emerged from the ground. 

 Leptysma marginicollis (Serv.). 



Miami, Fla., March 28, 1910; 1 d\ 3 9 . 

 Homestead, Fla., March 17-19, 1910; 3 d", 3 9 , 1 n. 



One female specimen from each of these localities has the general 

 coloration oil green instead of the prout's brown coloration usually 

 found in this species; the dorsal surface, however, in each of these 

 specimens is cinnamon. The lateral pale bars are strongly indicated 

 in "all but one of the adults here recorded. The series before us 

 would indicate that in this species there is some increase in size 

 southward, but we find that this is not constant. The length of the 

 females which we have examined from southern Florida varies from 

 32.5 mm. to 38.5 mm. 



At Homestead the specimens were all taken among grasses in the 

 everglades, while those from Miami were captured among a few 

 cat-tails growing in a wet spot. 



Schistocerca americana Sc. 



Miami, Fla., March 20, 27, 1910; 3 d\ 1 9 • 



Kev Largo, Fla., March 18, 1910; 1 d\ 



Long Key, Fla., March 13, 1910; 2 d\ 2 9 . 



Kev Vaca, Fla., March 14, 1910; 1 d", 1 9 . 



Boot Kev, Fla., March 14, 1910; 1 d\ 1 9 . 



Kev West, Fla., March 15, 16, 1910; 4 d\ 1 9 : November 21, 

 1911 (Englehardt) ; 1 9 [B.I.]. 



In this series of specimens, taken in extreme southern Florida, the 

 wing length in many cases, notably in the individuals from the Keys. 

 is much less than the average of those from more northern localities. 

 The following measurements in millimeters give the average of some 

 forty specimens we have examined; the figures in parentheses indicate 

 the range of variation in specimens from the region given. 



Length of pronotum. Length of tegmina. 



Males from southern 



Florida 8.2 ( 7.5 to 8.7) 37.4 (34.5 to 40.5) 



Males from Georgia to 



Pennsylvania 8.3 ( 8.2 to 9. ) 43.8 (41.7 to 47.2) 



Females from southern 



Florida 10.4 ( 9.5 to 12. ) 46.9 (42.2 to 50. ) 



Females from Georgia to 



Pennsylvania 10.6 (10. to 10.7) 56.8 (54. to 58.5) 



