1916.] NATURAL SCIENCES OF PHILADELPHIA. 129 



decided than in N. c. arcuatus, much as in N. c. 



borealis.) 



Nomotettix cristatus fioridanus Hancock. 



The race of the Middle States, N. c. compressus, shows the greatest 

 development of the vertex and its median carina, the median carina 

 of the pronotum, and the production of the cephalic margin of the 

 pronotum. The two races in distribution furthest removed from this 

 insect, .V. c. borealis in the north and N. c. floridanus in the south, 

 show the greatest divergence from this type, which divergence has 

 taken place along parallel lines in a number of characters (pronotal and 

 femoral) but in others separates these two races most widely of all. 



Nomotettix cristatus borealis E. M. Walker. 



Through Dr. Walker's great kindness, we have before us the type 

 (his figured 9 , here selected) and paratype ( 9 ) of this insect, the 

 only specimens known, which were taken at Diamond Lake, Tema- 

 gami District, Ontario, September 7, 1903, by Dr. Walker and were 

 described most satisfactorily by him. 17 



The difference given in the pronotal arcuation when compared 

 with -V. c. cristatus is of no value as a character, that insect exhibiting 

 frequently such irregularity as described. The present race, however, 

 is the most strongly denned and, as Dr. Walker suggests, the northern- 

 most of the races of the present species. 



Nomotettix cristatus cristatus (Scudder). 



1862. Batrachidea carinata Scudder, Bost. Journ. Nat. Hist., VII, p. 479. 

 [Massachusetts.] 



Ontario. Blue Hill, Suffolk Countv, (P. W. 



Go Home Bay, VI, 1908, (E. M. Whiting), 6 d\ 5 9 , [A. X. S. P. and 



Walker), 2 9, [Univ. Toronto Cln.]. , Hebard Clns.]. 



Mt. Holyoke, VI, 24, 1898, (F. Knab), 



New Hampshire. 1 cf, [U.S. X. M.]. 



Warren, (P. \V. Whiting), 4 d% 35 9, 1 Marion, VIII, 30, 1905, (H.), 19, 1 



juv. 9, [A. X.S. P. and Hebard Clns.]. J»v. o". 



Connecticut. 

 Massachusetts. 



HeLd Ch^.] 9 ' [A " N ' ^ R and ^w Haven, VI, 1, 1910, (H.), 1 *. 



North Saugus, VI, 16, 1906, (E. A. N y , 



Back), 2^19,[U. S. X. M.]. New * ork - 



Wellesley, (P. W. Whiting), 7 d\ 3 9, Forrest Park, L. I., VI, 15, 1902, 1 d\ 



[A. N. S. P. and Hebard Clns.]. [Hebard Cln.]. 



Forest Hills, V, 10 and 11, 1912 and Mosholu, VI, 22, 1902, 1 <f , [Hebard 



1913, (P. W. Whiting), Id", 19, Cln.]. 



[A. N. S. P. and Hebard Clns.]. 



17 Can. Ent., XLI, p. 173, pi. 7, figs. 1 and la, (1909). 



