FAM. MEMBRACID^ 91 



Type rotundicornis Fairmaire. 



k 



Geographical distribution : Only two species described, both fiom South America. 



1. >o/««i/^or««5 Fairmaiie, Rev. Memb. 314. 4 (1846). — PI.4, fig. 45. Brazil, Venezuela, Colombia. 



2. truncaticornis Godmg, Amer. Mus. Novit. i5 (igSo). Brazil. 



55. GENUS EUALTHE Stal 



Eualthe Stal, Bid. Hem. Syst. 557 (1867). 



Characters : Large elongate insects with nearly horizontal suprahumeral horns, a long, slender, 

 slightly upturned posterior process and the tegmina partly covered by the sides of the pronotum. Head 

 triangular; base strongly arcuate; eyes subtriangular ; oceUi large, nearer to each other than totheeyes; 

 inferior margins of gente straight and sloping; clypeus diamond-shaped, projecting for half its length 

 below the inferior margins of the genae. Pronotum low, tectiform, dorsum nearly straight; metopidium 

 straight; humeral angles blunt, triangular; suprahumeral horns heavy, blunt, extending outward and 

 shghtly upward; posterior process long, slender, slightly upturned, and extending beyond the tips of the 

 tegmina ; scutellum entirely covered by the sides of the pronotum. Tegmina long, narrow, fuscous- 

 hyaUne,pubescent, about one-third covered by the sides of the pronotum ; five apical and two discoidal 

 ceUs; median apical ceU truncate at base; apical limbus very narrow. Legs simple; hind tarsi longer 

 than the other two pairs. 



Type lavigata Fairmaire. 



Geographica! distributlon : The only two species known were described from Brazil and have 

 never been reported from any other country. 



1. lavigata Fairmaire, Rev. Memb. 3i8. 18 {1846). Brazil. 



2. punctum Fairmaire, Rev. Memb. 3i8. 17 (1846). — Pl. 4, fig. 46. Brazil. 



56. GENUS NASSUNIA STAL 



Nassunla Stal, Rio Jan. Hem. H : 3o (1862). 



Characters : Medium sized, robust insects with stout diverging suprahumerals and entirely free 

 tegmina. Head triangular; base arcuate; eyes ovate; oceUi large, prominent, equidistant from each 

 other and from the eyes and situated about on a Une drawn through centers of eyes; inferior margins of 

 genae sinuate ; clypeus sUghtly swoUen in center, extending for half its length below the inferior margins 

 of the genae. Pronotum convex, moderately elevated, not compressed, tectiform; metopidium straight; 

 median carina strongly percurrent; humeral angles weak, bhmt, triangular; suprahumeral horns stout, 

 sharp, diverging, extending outward and upward; posterior process strong, tectiform, suddenly acumin- 

 ate, extending beyond end of abdomen but not reaching tips of tegmina; scuteUum entirely concealed. 

 Tegmina entirely free, hyaUne; five apical ceUs with the median cell truncate at base ; one discoidal 

 ceU; veins strong and sUghtly raised ; apical Umbus broad. Legs simple; hind tarsi the longest. 



Type bistillata Stal. 



Geographical distribution : This genus is known only from South America with the foUowing 

 records of distribution. 

 I. binotata Fairmaire, Rev. Memb. 291. 3 (1846). BraziL 



