i66 HOMOPTERA 



duced on each side of the scutellum; scutellum elongate, narrowing toward the apex which is obtuse or 

 truncate. Tegmina entirely exposed; hyaline; veins strong; seven or more apical cells and two discoidal 

 cells; apical hmbus obsolete. Legs simple; tibiae triquerate; tarsi about equal in length. 



Typ« Umniscata Stal. 



Geographical distribution : A small genus with a limited distribution in the northern part of 

 South America. 



1. cicadoides Walker, Journ. Ent. I : 3i7 (1862). Brazil. 



2. interrupta Stal, Ofv. Vet. Akad. Forh. 249. 2 (i858). Brazil. 



3. lemniscata Stal, Ofv. Vet. Akad. Forh. 249. i (i858). Brazil. 



4. obliqua Walker, List Hom. B. M. Suppl. 341 (i858). Brazil, Venezuela. 



5. retrospina Lethierry, Ann. Ent. Soc. Fr. XVI : i55. 57 (1890). Venezuela. 



6. subfasciata Stal, Ofv. Vet. Akad. Forh. 249. 3 (i858). Brazil, Venezuela. 



144, GENUS ENDOIASTUS FOWLER 



Endoiastus Fowler, B. C. A. H : 168 (1896). 



Characters : Small, delicate, fragile insects with no posterior process, convex unarmed prono- 

 tuin, strongly sulcate head and with semiopaque tegmina showing four apical and no discoidal cells. 

 Head subquadrate, about as broad as high but with the length apparently exaggerated due to the basal 

 lobes and the large clypeus; base elevated into two large lobes, deeply notched between; eyes small, later- 

 ally flattened; ocelli very small. inconspicuous, situated in the upper corners of the head, very close to 

 the base and to the eyes; inferior margins ofgenae short and straight ; antennae unusually well developed, 

 inserted below and slightly in front of the eyes; clypeus broad, expanded, extending for three-fourths its 

 length below inferior margins of genae. Pronotum convex, wilhout processes of any kind, strongly 

 keeled; metopidium sloping, broader than high; median carina strongly percurrent; scutellum entirely 

 exposed, triangular, a little longer than thebreadth at the base, base convex, apex flat, very weakly cari- 

 nate. Tegmina coriaceous, semiopaque, broadly rounded at tips; four apical and no discoidal cells;no 

 apical limbus. Legs simple, very slender; all tarsi about equal in length. 



Type caviceps Fowler. 



Geographical distribution : Represented by two species, both apparently quite rare. 



1. cayiceps Fowler, B. C. A. \l : 168. i (1896). — Pl. 9, flg. 125. Guatemala, Nicaragua, Ecua- 



dor. 



2. productus Osborn, Zoologica HI : 233 (1921). British Guiana. 



145. GENUS MINA WALKER 



Mina Walker, List Hom. B. M. Suppl. i65 (i858). 



Characters : Curious little Centrotinae without posterior process, with convex unarmed prono- 

 tum, tegmina with five apical cells, and distinguished particularly by the horizontal extensions on the 

 base of the head Head subquadrate, broader than high; base elevated and bearing long horizontal 

 horns; eyes large and globular; ocelli large, conspicuous, farther from each other than from the e3'es and 



