1916.] NATURAL SCIENCES OF PHILADELPHIA. 163 



The present series of five hundred and thirty-five specimens 

 exhibits the almost endless variation in size, the numerous structural 

 and proportional modifications and all the pure and compound color 

 phases found in this extremely plastic species. In the matter of 

 wing length we find both one of the most abbreviate females and 

 the most macropterous one of the same sex in the Lynchburg series. 

 The macropterous one of these measures 22.5 mm. in length of body 

 and 21.5 mm. in length of tegmen, while the abbreviate one has the 

 same proportions, 21.5 and 17.4, respectively. The only noteworthy 

 color modification is seen in the Isle of Palms series, which, taken 

 among the dunes of a barrier beach, is prevailingly grayish, two 

 of the females having almost no distinct markings, in this respect 

 much resembling 0. olivacea, with which this species was there 

 associated. 



Certain specimens from Punta Gorda, Florida, particularly one 

 female, show a tendency toward the new 0. halophila occurring in 

 the same general region, but this is purely one of general resemblance 

 and not of close affinity. This apparent divergence from the basic 

 type is not true of all the individuals from that locality, as others 

 are perfectly typical of pelidna. 



As to the synonymy of Orphulella pratorum Scudder with the 

 present species, it seems only necessary to say that the more material 

 seen by us the more certain are we of the correctness of the association. 

 This specie's was found over the whole region treated in the present 

 paper, frequenting the greatest variety of habitats, from salt marsh 

 grass (in company with olivacea at Tybee Island and Wrightsville) , 

 to barren hillsides (Fredericksburg) and mountain slopes under 

 timber in a luxuriant undergrowth of grasses, vines and oak sprouts 

 (Currahee Mountain). The undergrowth in pine woods, i.e., gall- 

 berry, bunch and wire-grass, seems to be more preferred than cam- 

 pestrian situations. At Isle of Palms this species and olivacea were 

 found in the dry hollows of dunes among vegetation composed of 

 bayberry, Myrica cerifera, scrubby oak, briars and cabbage palmetto, 

 Sabal palmetto. 



Orphulella olivacea (Morse). 



Virginia. South Carolina. 



Franklin, Accomac County, IX, 22, Isle of Palms, VIII, 15, 1913, (R.), 

 1907, (B. Long), 1 9 , [A. X. 8. P.]. 1 <?. 



Georgia. 



North Carolina. Tybee Island, IX, 2, 1911, (R. & H.), 

 Wrightsville, IX, 7, 1911, (R. & H.), 14 cf, 18 9. 



2 9 . Sandfly, IX, 3, 1911, (R. & H.), 1 <?. 



