620 PROCEEDINGS OF THE XATIOXAL MUSEUM. vol. xxx. 



CEPHALOCCEMA TERETIUSCULA Brunner. 

 This insect is also credited to Paraguay." 



CEPHALOCCEMA, species. 



A fourth species of this genus is represented b}^ a single n3'mph 

 which was taken l)v the writer during the month of September at San 

 BeiMiardino. It is a rather rolnist form Avith short, stout legs, and in 

 whicli the rostrum of the vertex is broad, sulcate, evenly tapering, 

 and longer than the rest of the head. The hind tibiae are provided 

 with 17 spines on the inner and 19 on the outer upper margin and 

 below with a few minute ones on the outer edge. The pronotum and 

 abdomen above are furnished with longitudinal costi\j in the fashion of 

 costulata. 



Several additional species are lia])le to occur in Paraguay. Those 

 the habitat of which is known and would permit of this are also 

 included in the following synoptic table: 



TABLE FOR DETERMINATION OF SPECIES. 



It. Rostrum of the vertex scarcely as long as or but little longer than balance of 

 head. Pronotum pnnctulate or smooth. Tiliife above on both sides with not 

 more than 16 spines. 

 }). Rostrum of the vertex mucli shorter than the remainder of head. Abdomen 



5-ridged costalata Burmeister and fnirmeisteri Bruner 



hb. Rostrum of the vertex distinctly shorter than or but little longer than 

 remainder of head. Aljdomen not 5-ridged. 

 c. More robust; rostrum pyramidal, acuminate, viewed from the front narrowly 

 lamellate. Antenn;e of female greatly surpassing the rostrum. 



horelUi. Giglio-Tos 

 cc. More slender; rostrum with the sides parallel. 



d. Rostrum linear, obtuse, viewed from the front narrowly cruciform. 



Antenna' of female a little surpassing the rostrum caizana Giglio-Tos 



dd: Rostrum quadrangular, obtuse, as long as (female) or longer (male) than 



the rest of head calamus Burmeister 



(/'/. Rostrum much (two or more times) longer than the remainder of head. 

 h. I'ronotum longer than the head. 

 c. Pronotum with the anterior margin not tuberculate. 



d. Rostrum less than twice the length of remainder of head, moderately 



dilated toward the apex obtusa Giglio-Tos 



dd. Rostrum fully twice as long as remainder of head, strongly dilated toward 



the apex magna Giglio-Tos 



(T. Pronotum with the anterior margin bituberculate gigantea Giglio-Tos 



bb. Pronotum shorter than tiie head. 

 c. Rostrum less than four times as long as remainder of head. 

 (/. Rostrum a trifle more than twice as long as remainder of head; the ante- 

 rior femora about two-thirds as long as pronotum teretiuscida Brunner 



dd. Rostrum three times as long as remainder of head; the anterior femora 



a trifle longer than tlie pronotum lancea Burmeister 



cc. Kostrnm more than four times as long as remainder of head. 



litieata Brunner 



«See Monog. Proscop., p. 82. 



