CICADELLINAE : PART I. PROCONIINI 173 



7. Pygofer processes Strongly hooked in caudoventral aspect . ... 8 

 Pygofer processes not so. . . T. punctatissima Melichar (fig. 160) 



8. Style with inesoapical lobe angular. T. costalimai, new species 

 Style with mesoapical lobe digitiform . , . T. tomentosa (Distant) 



Tretogonia bergi, new species 

 Figure 156 



Length of male 10.5-11 mm.; of female 11.5 mm. Pronotum not ex- 

 tending posteriorly as far as transverse sulcus of scutellum, truncate or 

 slightly concave at apex. Forewing with claval veins usually elevated 

 and distinct, veins of corium obscured except in membrane. Male 

 pygofer strongly produced and rounded apically, with numerous dis- 

 persed microsetae over disc, with a few interspersed anteapical macro- 

 setae; process in ventral aspect tapered and bisinuate, acute apically; 

 plates not extending as far posteriorly as pygofer. 



Holotype male and a long series of topotypes, Pelotas, Rio Grande 

 do Sul, Sept. 1, 1955 (C. Biezanko), in SSM; a short series of topotypes 

 (BM) ; two specimens, Sao Leopoldo (RMS) ; specimens from Rio 

 Grande do Sul, Brazil, from Paraguay, and from Formosa, Argentina 

 (HNHM) ; specimens from Coralito, Uruguay, Montevideo, Argentina 

 and Pelotas, Brazil (USNM); specimens from Porto Alegre, Brazil 

 (ZIMH) ; specimens from Rio Grande do Sul (MHNP). 



7". bergi is readily distinguished from otlier species of Tretogonia by 

 the form of the pygofer process in ventral aspect. 



Tretogonia costalimai, new species 



Figure 162 



Length 10 mm. Head with anterior margin regularly convex in 

 dorsal aspect. Pronotum extending posteriorly to transverse sulcus of 

 scutellum. Forewing with inner claval vein distinct or not, veins of 

 corium distinct before membrane. Male pygofer produced and sub- 

 angular at apex, process in ventral aspect with apex curved laterad; 

 plates extending as far posteriorly as apex of pygofer, otherwise as in 

 T. bergi, new species; style truncate and slightly concave apically; 

 connective Y-shaped, with a median keel ; aedeagus without processes. 

 Other structural characters as in generic description. Color much as 

 T. bergi but without yellow spot on face. 



Holotype male, Rupummi, British Guiana, June 1933 (Scaramuzza), 

 on indefinite loan to USNM from NCS; and a pair of additional speci- 

 mens, same data (NCS). 



This species is closely related to T. punctatissima Melichar, from 

 which it can be separated by its truncate style apices and its more 

 strongly curved pygofer processes in ventral aspect. 



