374 PROCEEDIXOS OF THE NATIONAL MUSEUM. 



CorumM, Matto Grosso, Brazil. (H. H. Smith.) [C.S.N.M.] 

 Four males, one female. 



These specimens exhibit considerable variation in structure and in 

 color, as is found in any series of the species. Several of the Corumba 

 individuals appear to ))e close to (/mcilis, being slenderer than usual, 

 but the lateral carinse are not partially obsolete as in that form. As 

 stated above, it is possible that r/racJIis may be only an extreme form 



of this spgcies. 



The specimens from Pernambuco are duller and more uniform than 

 the other individuals, l)ut this is probal^ly due to alcoholic collectino-. 

 The Chapada series is more variegated and richly colored than any of 

 the other specimens. T\w individual from St. Thomas is quite small 

 and rather robust, hut does not appear separal)le when compared with 

 a large series of this species. 



COCYTOTETTIX Rehn. 



1900. Fenestra Bkunek (not of (aglio-Tos, 1895), Ace. Gen. Spec. Locusts Argent., 



pp. 22, 30. 

 1906. Cocytotettix Rehn, Proc. Acad. Nat. Sci. Phila., 1906. 



COCYTOTETTIX LINEARIS, new species. 



Types. —:SLa\G and female: Chapada, Matto Grosso, Brazil. Septem- 

 ber. (H. II. Smith.) [Cat. No. 8300, U.8.N.M.] 



Apparently, allied to C. argentina (Bruner)," but ditfering in the 

 longer, slcnclerer tegmina, the slenderer caudal femora, the lack of 

 green on the costal margin of the tegmen and of cinnabar red on the 

 base of the wings. 



No close relationship exists with the other two species of the genus— 

 C.pulehr'qMnrux (Bruner) and intcrmedlux (Bruner)— as they both have 

 the tegmina considerably expanded in the male and the wings strongly 

 vermilion or rose-red proximad. 



Size iiK^lium; form slender: surface slightly rugulose. Head 

 slightly longer than the pronotum, moderately jjroduced in the female, 

 considerably produced in the male, the dorsum when viewed laterad 

 quite fiat; fastigium with its greatest width but slightly greater than 

 the interspace between the eyes, the extension beyond the eyes being 

 slightly less than the greatest width, the distal angle acute with the 

 immediate apex l)lunt, lateral margins elevated and distinct, as is also 

 the median longitudinal carina, which, in a much weaker form, extends 

 caiidad over the occiput: face strongly retreating in the male, consid- 

 eral)ly in the female; lateral foveohv not distinct, ventrad; frontal costa 

 with the lateral margins parallel veutrad, constricted toward the fas- 

 tigium, the costa excavated but not sulcate, a trace of a median ridge 

 present dorsad; eyes ra.ther elongate ovoid, about twice the length of 



« Ace. Gen. Spec. Locusts Argent., p. :^1. [Carcarana, Santa Fc, Argentina.] 



