1906.] NATURAL SCIENCES OF PHILADELPHIA, 31 



This series exhibits considerable variation in the intensity of the 

 coloration, the dorsal aspect ranging in color from dull blackish brown 

 to mottled ochre and umber and again washed with dull green. The 

 paler lateral bands, including the ventral portion of the lateral lobes, 

 pleura and caudal femora are distinct in all the specimens examined 

 and in several are decidedly greenish; in these cases the gense are 

 also colored. Some individuals are distinctly maculate, or might 

 really be called tessellate, ochre and umber being the two colors. 

 Considerable variation in the sharpness of the angle of the fastigium 

 is also noticeable, and in both sexes. In some females the angle is 

 almost as acute as in some males. 



The species has previously been recorded by Giglio-Tos ^^ from 

 Gualaquiza, Cuchipamba and the valley of Santiago, Ecuador. 



GOMPHOCERI. 



The South American genera of this group are six in number, three 

 previously known and three recognized as the result of the present 

 study. Of these genera two will be described in a subsequent paper, 

 but they are mentioned here to show their position in the series. The 

 genera would stand as follows: 



Fenestra Giglio-Tos {=Dichroatettix Bruner). 



Staurorhectus Giglio-Tos. 



Isonyx n. gen. 



Borellia n. gen. 



Stereoteitix n. gen. 



Tristira Bruner. 



The first genus is quite distinct, as is the second. The next three 

 genera, Isonyx, Borellia and Stereoteitix, show some characters in 

 common, but differ in a number of others, such as the position of the 

 lateral foveolae and the relative proportion of the spurs. The last, 

 Tristira, is a quite distinct type, much isolated from the others and 

 immediately recognizable by its peculiar facies. 



FENESTRA Giglio-Tos. 



1895. Fenestra Giglio-Tos, Zoolog. Jahrbiicher, Syst. Abth., VIII, p. 807. 



Type.— F. bohlsii Giglio-Tos. 



1900. Dichroatettix Bruner, Ace. Genera Spec. Locusts Argent., pp. 22, 32. 



As I have stated on a previous page (p. 30) these names apply to 



the same genus and species. As there stated Fenestra is invalid from 



Bruner, 1893,^® on account of the lack of a type or included named 



'^Bollett. Mus. Zool. Anat. Comp. Torino, XIII, No. 311, p. 39. 

 »« Ann. Mus. Civ. Stor. Nat. Geneva, XXXIII, p. 120. 



