170 



HOMOPTERA 



convex, apex acute. Tegmina free ; basal half coriaceous and punctate; apical half hyaline; five apical 

 and two discoidal cells; no apical hmbus. Legs simple; all tarsi about equal in length. 



Type carinatus Blanchard. 



Geographical distribution : The four known species are all from Chile. 



1. carinatus Blanchard, Gay Hist. Chile 269 (iSSa). — Pl. 9, fig. I 30. Chile. 



2. cuneata Butler, Cist. Ent. II : 212 (1881). Chile. 



3. dohrni Signoret, Ann. Ent. Soc. France UI : 584(i863). Chile. 



4. gayi Blanchard, Gay Hist. Chile 286(i852). Chile. 



151. GENUS TOLANIA STAL 



Tolania Stal, Ofv. Vet. Akad. Forh. XXIV : 248 (i858). 



Characters : This genus is distinguished by having suprahumeral horns but no posterior 

 process. It is the only genus in the New World having this curious combination of characters. The 

 insects are among the largest of the New World Centrotinse, with robust bodies and long tegmina. 

 Head subquadrate, twice as broad as high; base sinuate, depressed in the middle; eyes large, ovate, 

 protruding; oceUi large, conspicuous, equidistant from each other and from the eyes and situated below 

 aline drawn through centers of eyes; inferior margins of genae straight, sloping downward and inward; 

 clypeus indistinctly trilobed, the median lobe extending for half the length of the clypeus below 

 the inferior margins of the genae. Pronotum convex and bearing a pair of suprahumeral horns which 

 vary m lengthand in sharpness but are always prominent ; metopidium vertical, broader than high; 

 median carina percurrent ; humeral angles heavy and blunt; scutellum entirely exposed, subquadrate, 

 about twice as long as broad, swollen at base, flat on apical two-thirds, weakly carinate; tip blunt and 

 regularly rounded. Tegmina free; hyahne; base broadly coriaceous and punctate; tips rounded; veins 

 inclined to be spinose; seven apical and no discoidal cells; apical Hmbus verj- narrow. Legssimple; 

 femora cylindrical, tibise triquerous; hind legs longest. 



Type semipellucida Stal. 



Geographical distributlon ; A genus witha hmited number of species but rich in numbers of 

 individuals and widely distributed over Mexico, Central America and the northern part of South America. 



1. armata Stoll, Cigal. 90 (1780). Brazil, Colombia. 



fraterna Stal, Rio Jan. Hem. II : 37. 3. (i858). 



2. cristata Lethierry, Ann. Soc. Ent. France i55. 55 (1890). Brazil. 



3. fasciata Walker, List Hom. B. M. 1147 (i85i). Brazil, Venezuela. 



AmwjV/s Walker, List Hom. B. M. Suppl. 161 (i858). 



4. obscurus Germar, Rev. Silb. III : 258 (i835). Brazil. 



felinus Germar, Rev. Silb. III : 259 (i835). 



5. obtusa Fowler, B. C. A. II : 166 (1896). Guatemala, Panama,Yucatan, 



Honduras. 



6. opponens Walker, List Hom. B. M. Suppl. i5g (i858). — Pl. 9, Mexico, Guatemala, Panama, 



fig. 131 Yucatan,Brazil, BritishGui- 



ana. 



Neta : Two genera, Eustollia Goding and Williamsiana Goding, have been described and have appeared in the 

 literature of the family as belonging to the Tribe Abelini. Neither of these are Membracidae. 



