REHN AND HEBARD 129 



Trementina specimen. The former is unquestionably the present 

 race and the latter is presumably the same.^- 



Remarks. — The examination of the type of this form, shrivelled 

 and discolored though it is, permitted us to correctly place the 

 "gracilipes" of Brunner and other authors, as the species named 

 grallator by Scudder. The form of the stridulating field of the 

 tegmina and the structure of the extremities of the cephalic 

 and median femora readily place the type specimen. The extremes 

 of the two races of this species have such different appearances 

 that with only a few typical specimens one could easily consider 

 them distinct species, but the possession of a considerable number 

 of individuals enables us to see their close relationship. Each 

 form is typical in a certain definite geographic area, probably inter- 

 grading over a portion of western Nebraska, Kansas and west 

 central Texas, for while we lack absolute intermediates we possess 

 specimens which show the lines of variation away from one type 

 toward the other. True gracilipes is developed more highly in the 

 elevated portion of northern New Mexico and adjacent Colorado 

 than elsewhere, varying slightly away from the typical form south- 

 ward and also somewhat westward; the specimens from southern 

 Arizona, while gracilipes in general sum total of characters, being 

 less decided than those from the higher elevations in or near the 

 main upHft of the Rocky Mountains. 



Specimens Examined; 41; 21 cf , IS 9 , 2 immature 9 : 



Southern Colorado, 1869, 1 &. Type. [U, S. N. M.] 



Raton, Colfax County, New Mexico, August 26, (Cockerell), 1 cf, [U. S. 

 N. M.]. 



Las Vegas Hot Springs, New Mexico, August 12, (H. S. Barber), 1 cf , [U. 

 S. N. M.]. 



Jemez Hot Springs, Bernalillo County, New Mexico, July 29, 1911, (John 

 Woodgate), 1 c?, [Hebard Collection]. 



Fort Wingate, McKinley County, New Mexico, August 17, 1910, August 

 28, 1903, (John Woodgate), 2 d" , [Hebard collection and A. N. S. P.]. 



Albuquerque, New 3kIexico, 1 d", [Hebard Collection ex Bruner]. 



Arroyo ten miles west of La Luz, Otero County, New Mexico, August 28 

 (at light), (C. H. T. Townsend), 1 c?, [Scudder Collection]. 



New Mexico, (H. Meeske), 1 cf , [Hebard Collection ex Bruner]. 



"- Prof. Cockerell writes us that the specimen was sent to Scudder and 

 kept by him. It could not be found in the Scudder scries by us. 



TR.\NS. AM. ENT. ROC, XL. 



