REHN AND HEBARD 387 



Kearney, Nebraska, 214G ft., VII, 27, 1910, (R. & H.; in river-bottom 

 grass land), 5 cf, 2 9 , 1 juv. 9 . 



Haigler, Nebraska, VIII, 5, 1904, 1 d^, [Hebard CIn.]. 



Julesburg, Colorado, 3160 ft., VII, 29, 1910, (R. & H.; in river-bottom 

 grass land), 1 c?. 



Neoconocephalus robustus robustus (Scudder) (PL XV, figs. 6B to 6E, 

 7B and 7C.) 



1813. [Gryllus (Tettigonia)] acwmiiiaia St oil (not Gryllus acuminaius Lin- 

 naeus, 1758), Natuur. Afbeeld. Beschr. der Spook., Zabelspr., p. 

 18, pi. 8a, figs. 27, 28. [Pennsylvania.] 

 1862. Conocephalus robustus Scudder, Bost. Journ. Xat. Hist., vii, p. 449. 

 [Cape Cod, Massachusetts.] 



Stoll's name acuminata, based unquestionably upon material 

 of this species, is preoccupied; the name which has been in gen- 

 eral use, robustus of Scudder, in consequence fortunately stands. 

 Other species have never been recorded as this insect, but all 

 southern and western records of robustus are properly referred to 

 robustus crepitans. 



A considerable amount of variation in size and shape of the 

 vertex is to be found in the present race; this is also true of the 

 southern and western race robustus crepitans, but in the latter 

 normally larger and more robust insect, the vertex is always 

 broader and more truncate at the apex. In the northeastern race, 

 robustus robustus, the vertex is always immaculate. The stridu- 

 lating field of the male tegmen is very large and rather broad, 

 more ample than in N. nebrascensis, in texture normal; the stridu- 

 lating vein is heavy, though not quite as heavy as in nebrascens'is, 

 and moderately long, with accompanying veins weakly developed. 



Types. — An unspecified series of both sexes from one locality. 



Single Type here Designated: cf; Cape Cod, Massachusetts. 

 (Samuel H. Scudder; by the sea-beach.) [Museum of Compara- 

 tive Zoology.] 



The ventro-cephalic margins of the cephalic and median fem- 

 ora are either smooth or bear single or a few small spines; the 

 ventral margins of the caudal femora bear usually a few small 

 spines, in the series before us the extremes in number being in- 

 ternal 5-12, external 0-5. 



For measurements see page 388. 



The green color phase is greatly predominant, brown individu- 

 als are rarely found. 



TRAXS. AM. EXT. SOC, XL. 



