318 Mr. F. Walker on undescribed Species of Homoptera. 

 Genus Oxygonia, Fairmaire. 



Oxygonia lineosa. dfas. Obscure fulva, robusta, subtus nigricans; 

 vertex acutus, carinis duabus obliquis nigricantibus ; thorax punctatus, 

 abdomen longe superans, antice bispinosus, lineis plurimis flavis fur- 

 catis ; alae anticae nigricanti-cinereae, venis nigris. 



Male. Dull tawny, stout, blackish beneath. Vertex somewhat 

 depressed, very acute in front, with an oblique ridge on each side. 

 Thorax convex, minutely punctured, slightly ridged above, extending 

 much beyond the abdomen and concealing the wings, with numerous 

 slender yellow vein-like forked lines ; a short spine in front of each 

 side, which is convex. Fore wings blackish cinereous ; veins black. 

 Length of the body 4 lines ; of the wings 7 lines. 

 Eio Janeiro. 



Genus Hoeiola, Fairmaire. 

 Horiola biplaga. Fcem. Nigra, brevis, robusta; caput linea abbre- 

 viata fulva; thorax fulvus, lituris lateralibus posticis duabusque 

 anticis nigris ; pectus fulvo notatum ; tarsi fulvi ; alae anticae nigra?, 

 apices versus hyalinae, macula magna discali pallide flava. 



Female. Black, short, stout. Head triangular, acute in front, 

 slightly rugulose, with a slender tawny line which is abbreviated in 

 front. Thorax tawny, punctured, ridged, extending to the tip of the 

 abdomen, with a black mark on each side of the disk in front, and with 

 black marks along each side hindward. Pectus with tawny marks. 

 Knees and tarsi tawny. Fore wings black, hyaline towards the tips ; 

 veins very thick ; a large pale-yellow spot in the disk, where the veins 

 are also pale yellow. Length of the body 2A lines ; of the wings G lines. 

 Eio Janeiro. 



Genus Tettigonia, Latreille. 

 Tettigonia caicus. Fcem. Laete flava, subtus pallida; vertex trun- 

 cato-conicus, frontis disco subconvexo; thorax luteo punctatus; ake 

 anticae e punctis luteis quinque aut sex lineatae ; posticae albse. 



Female. Bright yellow. Head beneath, pectus, abdomen and legs 

 whitish yellow. Vertex truncate conical; front with a prominent and 

 slightly convex disk. Thorax with several luteous points. Fore wings 

 with five or six rows of luteous points. Hind wings white. Length 

 of the body 5 lines ; of the wings 12 lines. 

 Rio Janeiro. _ 



/ Genus Rhotidus. 

 Fcem. Corpus longum, sat angustum. Caput depressum, longi-conicum, 

 postice concavum, fronte convexa. Scutum antice convexum, postice 

 rectum. Scutellum parvum. Abdonlen lanceolatum, alas paullo 

 superans. Pedes sat graciles ; tibia? spinosae. Alae anticae opacas, 

 elongatae, sat angustae, apicae conicae ; costa subconvexa. 



Female. Body long, rather narrow. Head very thin, elongate 

 conical or trowel-shaped, very concave behind; front convex in the 



