FAM. MEMBRACID^. 281 



Geographical distpibution : Thisgenus is known only from the type species from India. 



I. erecius Distant, Faun. Brit. Ind. App. 174. 3383 (1916). — P|. 14, East Himalayas, Kurseong. 



flg. 248. 



GENERA OF THE TRIBE OXYRHACHISINI DISTANT 



I. Pronotum with suprahumerals or a bulbous dorsal process 



A. Posterior process touching or concealing scutellum 



1 . Pronotum with suprahumerals 



a. Hind wings wiih ihree apical cells ; posterior process ampliaied 



beneaih Oxyrhachis Germar. 



aa. Hind wings wiihfour apical cells; posterior process noi ampliaie 

 beneaih 



b. Dorsutn of posterior process binodose Gongroneura Jacobi. 



bb. Dorsum of posterior process straighi 



c. Venalion of iegmina normal Xiphistes Stal. 



cc. Venaiiou of iegmina irregular, muliicellular .... Goddefroyinella Distant. 



2. Pronotum with an erect, laierally branched swollen dorsal process . Bulbauchenia Schumacher. 



B. Posterior process high above scutellum Taklivva Funkhouser. 



II. Pronotum unarmed 



A. Posterior process compressed and ampliated beneaih; hind wings with 



ihree apical cells O.xyrhachidia Melichar. 



B. Posterior process not ampliated beneath ; hind wings wiih four apical 



cells XiPHisToiDES Goding. 



280. Genus OXYRHACHIS Germar 



Oxyrhacliis Germar, Rev. Silb. III : 2^2 (i835). 



Polooentrus Buckton, Mon. Memb. 253 (1903). 



Ouranorthus Buckton, Trans. Linn. Soc. Lond. IX : 333 (igoS). 



Characters : A large, distinct, well-known, widely distributed and important genus which, as 

 the type genus of its tribe, shows, as would be expected, the more or less foliaceous head and front 

 tibise and the concealed scutellum characteristic of that tribe, and is distinguished from the other genera 

 of the tribe by the ampliate keel on the underside of the pronotal process and the three apical cells of 

 the hind wings. Head foliaceous, quadiate, roughly sculptured; base arcuate and strongly sinuate ; 

 eyes large, globular and protruding; ocelli very large, prominent, equidistant from each other and from 

 the eyes and situated on a hne drawn through centers of eyes ; inferior margins of genae flattened, 

 fohaceous, strongly lobate and sharply angulate; clypeus long, nairow, extending only a little below 

 the flattened inferior lobes of the genae, tip rounded or truncate. Pronotum gibbous and convex with 

 strong suprahumerals and a robust posterior process; metopidium vertical, about as broad as high; 

 median carina strongly percurrent; humeral angles heavy, subconical and blunt; suprahumeral horns 

 varying consideiably in size and shape but usually tricarinate, much longer than the distance between 

 their bases, e.xtending upward and outward with tlie tips rather blunt; posterior process long, heavy, 



