FAM. MEMBRACIDiE i63 



a. Pronotum unarmed 



b. Corium with sevtn or more apical cells Nicomia Stal. 



bb. Corium with tioi more ihan five apical cells 



c. Corium wiih four apical cells and no discoidal cells .... Endoiastus Fowler, 

 cc. Coiium withfive apical cells 



d. Base of head bearing long, horizontal horns Mina Walker. 



dd. Base of head unarmed 



e. Crest of scutellum low Lophyraspis Stal. 



ee. Crest of scutellum elevated inio an ereci horn .... Gerridius Fowler. 

 aa. Pronotum with erect processes or wiih suprahumeral horns 

 b. Prouotum withoui suprahumerals 



c. An erect horn on the prouotiim and another on the scuiellum . . Lamproptera Germar. 

 cc. A single elevation on the pronotum 



d. Pronoium bearing a porreci horn Orekthen Funkhouser. 



dd. Pronotum with a crest ouly Melizoderes Blanchard. 



bb. Pronotum with suprahumerals Tolania Stal. 



139. genus ABELUS stal 



Abelus Stal, Bid. Memb. Kan. 294(1869). 



Characters : Diminutive insects distinguished at once by the lack 01 a posterior process and 

 the fact that the posterior end of the clavus is broad and obtuse. Head subquadrate, much broader than 

 high ; base straight ; eyes large and globular ; ocelli large, prominent, twice as far from each other as from 

 the eyes and situated high up near the basal margin of the head; inferior margins of genae nearly straight ; 

 clypeus extending for half its length below inferior margins of genae. Pronotum convex, without pro- 

 cesses; metopidium vertical, convex, about as wide as high; median carina faintly percurrent; humeral 

 angles strong, rounded, blunt; no posterior process; scutellum entirely exposed, triangular, flat, tip 

 weakly bifid. Tegmina entirely exposed: hyahne with the base coriaceous and punctate ; veinsstrong; 

 five apical and three discoidal cells; apical limbus broad on anal margin. Legs simple, very slender; 

 hind tarsi longest. 



Type luctuosHs Stal. 



Geographical distribution : The two described species are both from South America. 



1. inermis Lethierry, Ann. Ent. Soc. Belg. 155(1890). Venezuela. 



2. luctuosus Stal, Bid. Memb. Kan. 294. i (1869). — Pi. 9, fig. I 22. Colombia. 



140. Genus STICTODEPSA STAL 



Stictodepsa Stal, Hem. Fabr. H : 58 (1869). 



Characters : \ monotypic genus erected by Stal to accoinmodate the Fabrician species/j/iYd/fl 

 characterized particularly by the triangular head and opaque tegmina and lacking a })Osterior piocess. 



Not* : Walker's geniis Narnia has been placed in this tribe, but the type of this genus is a])]jarently a cercopid. 



