FAM. MEMBRACID^ 187 



174. genus centronodus funkhouser 



Centronodus Funkhouser, Journ. N. Y. Ent. Soc. XXXVIII : 4. 405 (igSo). 



Characters ; A very distinct and rather remarkable genus characterized particularly by the large, 

 elevated, dorsal node at the base of the posterior process. The insects are large and robust with stout 

 suprahumerals, posterior process close to scutellum and semiopaque tegmina. Head subquadrate, 

 about as high and broad; base highly arcuate; eyes ovate; ocelH large, prominent, equidistant from 

 each other and from the eyes and situated about on a line drawn through centers of e^-es ; inferior 

 margins of genae rounded and often notched; clypeus extending for one-third its length below the 

 inferior margins of the genae. Pronotum convex with stout suprahumeral horns; metopidium vertical, 

 a httle broader than high; median carina strongly percurrent; humeral angles lafge. triangular, blunt ; 

 suprahumeral horns heavy, robust, more or less conical, extending outward and upward, as long as 

 the distance between their bases, tips triquerate and blunt; posterior process heavy, tectiform, very 

 close to the scutellum and impinging on the tegmina, with a high, elevated dorsal crest at its base, tip 

 suddenly acute and reaching beyond the internal angles of the tegmina; scutellum narrowly exposed 

 on each side. Tegmina semiopaque; basal and costal areas broadly coriaceous andpunctate; veins 

 heavy and pilose; venation very irregular, particularly in the apical region which may show as many as 

 twelve margmal apical cells and six or more discoidals ; anal apical margin truncate ; tippointed; no 

 apical limbus. Legs simple, femora cyhndrical, tibife triquerate ; hind tarsi very httle longer than 

 the others. 



Type denticulus Funkhouser. 



Geographical distribution : This genus has been reported from both Central and South 

 America. Only two species have been described but undescribed material indicates that other species 

 are not uncommon in South America. 



1. dciitictilus Funkhouser, Journ. N. Y. Ent. Soc XXXVIII : 4. 405 Costa Rica. 



(1930). — Pl. 10, fig. 150. 



2. flavus Funkhouser, Journ. N. Y. Ent. Soc. XXXVTII : 4. 406 (igSo). Brazil. 



175. Genus PLATYCENTRUS Stal 



Platycentrus Stal, Hem. Fabr. II : 48 (1869). 



Characters ; Medium-sized to iarge insects with robust bodies, well developed suprahumeral 

 horns and a short, heavy posterior process lying close to the scutellum. Head subquadrate, twice as 

 broad as high; base arcuate and sinuate; eyes ovate; ocelH prominent, nearer to each other than to the 

 eyes and situated about on a Hne drawn through centers of eyes; inferior margins of genae sloping and 

 incnrved; clypeus extending for half its length below inferior margins of gense. Pronotum convex 

 with strong suprahumeral horns; metopidium nearly vertical, broader than high ; median carina 

 percurrent; humeral angles large and blunt; suprahumeral horns strong, heavy, varying in length but 

 usuaHy longer than the distance between their bases, extending outward and upward and sometimes 

 sHghtly forward, tips usually sharp; posterior process short, heavy, tectiform, straight, tip sharp and not 

 reaching beyond the internal angles of the tegmina and not nearly as far as the end ol the abdomen, 



