390 STUDIES IN AMERICAN TETTIGONIIDAE (oRTHOPTERA) 



Davis has noted an apparent difference in the song of the two 

 forms which have been long considered distinct species; those 

 from Erma, New Jersey {crepitans) , appeared to sing less loudly 

 than those from Chatsworth, New Jersey (rohustus), heard on 

 consecutive evenings. We have noted climatic conditions to have 

 a decided effect on the song of the species under consideration 

 and this may be the explanation of the above, or rohustus crepitans 

 from the northeastern portion of its distribution may sing less 

 loudly than rohustus rohustus, but in the west, in the center of its 

 typical distribution, we have heard it singing with the full burr- 

 ing, buzzing whirr which is characteristic of, and fully as loud 

 as, the song of typical rohustus. 



The present geographic race is known from Cape Cod, Massa- 

 chusetts, to Philadelphia, Pennsylvania and Ocean View, New 

 Jersey, in which latitude the intergradation with rohustus crepitans 

 is found. The species has not yet been taken over sixty miles 

 from the coast. 



In addition to a number of specimens examined but previously recorded 

 we here record the following series of 159 specimens, 120 males, 32 females, 

 1 immature male and 6 immature females, and of racial intermediates, 63 

 specimens, 58 males, 4 females and 1 immature male. 



Penzance, Massachusetts, VIII, 20 and 21, 1911, (H. Fox), 2 cf, [A. N. 

 S. P.]. 



Saunderstown, Rhode Island, IX, 7, 1913, (H.; stridulating after dark on 

 trunk of haw), 1 c^. 



Wesquage Beach, Rhode Island, IX, 8 and 9, 1913, (H.; widely scattered 

 and plentiful over extensive open grassy areas along coast), 15 cf, 1 9 . 



Woodhaven, Long Island, New York, VIII, 1912, (W. T. Davis), 1 9 

 [Davis Cln.]. 



Coney Island, New York, (W. T. Davis), 1 d", [Hebard Cln.]. 



Staten Island, New York, VIII, 4, 1906, (W. T. Davis; in salt meadow), 

 1 9, [Davis Cln.]. 



Atsion, New Jersey, VII, 30, 1911, (R. & H.), 1 c^, 1 9 . 



East Plains, New Jersey, VIII, 24, 1914, (H.; in glade of tall grass out 

 on plains), 4 9 . 



Stafford's Forge, Ocean County, New Jersey, VIII, 24, 1914, (R.; in 

 huckleberry and sweet fern undergrowth of pine barrens), 1 9 . 



Spray Beach, Long Beach Island, New Jersey, IX, 24, 1907, (B. Long), 

 1 9, [A. N. S. P.]. 



Mullica River flats, Atlantic County, New Jersey, VIII, 24, 1914, (11. ; 

 high grasses on edge of marsh), 1 d^. 



Reega, New Jersey, VII, 31 to VIII, 29, 1914, (H.; rare in grasses of 

 fields in pine barrens), 3 d', 1 9. 



