166 U.S. NATIONAL MUSEUM BULLETIN 261 



truncate. Connective short, Y-shaped, stem very short, without a 

 median keel. Aedeagus symmetrical, curved gradually posteriorly and 

 dorsally, with a pair of short processes beyond base of shaft and a 

 single median unpaired process which greatly exceeds apex of shaft. 

 Paraphyses absent (see description of processes from posterior mem- 

 brane, above). 



Female abdominal sternum VII with posterior margin biundulate 

 each side of a median projection which is more prominent than in 

 Cicctis. 



The genus is known only from the type-species. Desamera is closely 

 related to Ciccus and to Procandea (p. 69), differing conspicuously in 

 that the posterior meron is exposed, a condition believed to have 

 arisen adventitiously in Desamera. 



SPECIES OF DESAMERA 



[*Type not seen.) 



*intersecta (Germar), 1821a:60 {Cicada). Peru, S. and SE, Brazil. New 

 combination. 

 adspeTsa\diV. peruviana (Melichar), 1926a:285 (jCoelopola). New synonymy. 



39. Genus TRETOGOJ<lIA Melichar 



Figures 153-162 

 Tretogonia Melichar, 1926a:273. Type-species: Tettigonia pruinosa Walker, 

 preoccupied, = Tretogonia notatifrons Melichar, by original designation. 



Length 10-12 mm. 



Head not strongly produced, anterior margin regularly convex or 

 truncate apically in dorsal aspect, crown rounded to face anteriorly, 

 ocelli much closer to posterior margin than to apex, located on or 

 slightly behind a line between anterior angles of eyes, each usually 

 slighdy closer to median line than to adjacent anterior eye angle, disc 

 of crown without median fovea or longitudinal carina laterad of each 

 ocellus, without an M -shaped elevation bordering posterior margin, 

 not pubescent, lateral clypeal sutures extending onto crown (often 

 obscured by pruinosity) and attaining ocelli; antennal ledges not or 

 scarcely protuberant, longitudinally fovcate in dorsal aspect, in lateral 

 aspect with a dorsal carina, anterior edges sloping gradually; clypeus 

 flattened medially, muscle impressions distinct; transclypeal suture 

 obsolete; face finely pubescent; clypellus slightly protuberant, contour 

 of its lower portion not continuing profile of clypeus. 



Thorax with pronotal width less than transocular width of head; 

 lateral margins parallel, disc with numerous large deep pits, without 

 conspicuous pubescence, posterior margin nearly always strongly 

 convex, extending much farther posteriorly than usual in the tribe. 



