250 PROCEEDINGS OF THE ACADEMY OF [April, 



Length of Width of 

 Width of caudal caudal Length of 



<? tegmen. femur. femur. cercus. 



Lake County, Indiana 2.2-2.3 10.8-11 2.4-2.5 1.6-1.8 



Stafford's Forge, New Jersey. 2. 2-2. 4 10.2-10.6 2.5-2.6 1.5-1.8 



Winter Park, N. C 2.7-3 11.7-14.7 2.9-3.3 1.7-1.8 



Jesup, Ga 3-3.2 12.5-14.2 3-3.4 1.9-2 



Atlantic Beach, Fla 2.S-3.5 12.9-14 3.3-3.4 1.8-2 



Miami, Fla 2.1-2.4 10.6-11.5 2.6-3 1.5-1.7 



The females show a similar variability, which demonstrates that 

 examples from the most northern localities in the distribution of the 

 insect are smaller, with shorter tegmina and wings, the increase in 

 size in the southward distribution reaching its maximum in southern 

 Georgia and northern Florida. Southward in Florida a considerable 

 decrease in size, accompanied by a general attenuation of form, is 

 found, specimens from the mainland of extreme southern Florida 

 being the smallest and most attenuate of any before us, with pro- 

 portionately the longest tegmina and wings. A well-defined geo- 

 graphic race, P. a. paroxyoides, occupies the Florida Keys. 



Although dark individuals are present in all of the series before us, 

 we find the material from the coast of the Carolinas and Georgia 

 to be more yellow in general coloration than is usual in specimens 

 from other portions of the range of the species. Such specimens 

 were noticed to be particularly brilliant in life, and showed a very 

 close parallelism in color and markings to Melanoplus australis, with 

 which insect the present species was often found. In life Melanoplus 

 australis is one of the most brilliantly colored species of that very 

 large genus. 



This insect prefers moist spots, usually in forest undergrowth 

 or on the margins of swamps and marshes. It was found common 

 in an open glade covered with grasses over a foot in height (Florence), 

 particularly in the drier portions of the salt-marsh margin (Tybee 

 Island), about the edges of a wet depression in pine woods (Winter 

 Park, Jesup), at the first of these localities associated with Melanoplus 

 decorus, and in a heavy tangle of vegetation in a cabbage palmetto 

 "hammock" (Atlantic Beach). The species was occasional in swamp 

 grasses along a heavily wooded "branch" (Fayetteville) and scarce 

 in strand plants (Cumberland Island), in low bog vegetation through 

 the long-leaf pine woods (Homerville), in low vegetation and 

 grasses near swamp (Mixon's Hammock) and in a cypress swamp 

 (Jacksonville). 



The present species is known on the Atlantic coast from Jamesburg 

 and Lakehurst, New Jersey, southward to the extreme southern por- 



