FAM. MEMBRACID/E 169 



2. cristala Stal, Hem. Fabr. 11 : 56 (1869). — Pl. 9, fig. I 28. British Guiana. 



3. muscaria Fabricius, Syst. Khyng. 44. 60 (i8o3). South America. 



4. pygmaa Fabricius, Syst. Rhyng 44. 57 (i8o3). South America. 



5. scutellata f^^abricius, Syst. Rhyng. 44. 58 (i8o3). South America. 



6. vacca Germar, Mag. Ent. IV : 34. 6 (1821). Brazil. 



149. Genus OREKTHEN Funkhouser 



Orekthen Funkhouser, Journ. N. Y. Ent. Soc. XXXVIII : 4. 406 (igSo). 



Characteps : Very small, inconspicuous insects having a stout porrect horn on the pronotum 

 but with the scutellum unarmed. Head vertical, subquadrate, roughly sculptured, broader thanhigh; 

 base arcuate and without lobes ; eyes large andglobular; ocelli large, conspicuous, slightly elevated, 

 nearly twice as far from each other as from the eyes and situated about on a line drawn through centers 

 of eyes; inferior margins of genae strongly slopingdownward and feeblysinuate;clypeus longand narrow, 

 extending for half its length below inferior margins of genae. Pronotum extended forward and upward 

 into a stout heavy horn with rounded tip ; metopidium projecting slightly forward over the head, triangu- 

 lar; median carina percurrent; humeral angles strong and blunt; scutellum entirely exposed, unarmed, 

 triangular, base swoUen, tip acuminate and just reaching the internal angles of the tegmina. Tegmina 

 f ree ; corium hyaline with strong punctate veins ; clavus entirely coriaceous and punctate ; tips of tegmina 

 broadly rounded; five apical and two discoidal cells; no apical limbus. Legs simple, very slender; all 

 tarsi about equal in length. 



Type osborni Funkhouser. 



Geographical distribution : The three described species of Orekthen are all from the extreme 

 southern part of South America. 



1. darwiui Funkhouser, Ent. News XLV : 8. 2o3 (1934). Chiloe Island. 



2. osborni Funkhouser, Journ. N. Y. Ent. Soc. XXXVIII : 4. 407 (1930). Chile. 



Pl. 9, fig. 129 



3. variegata Funkhouser, Journ. N. Y. Ent. Soc. XXXVIII : 4. 408 Chile. 



(1930). 



150. genus melizoderes blanchard 



IVIelizoderes Blanchard, Spin. Gay Hist. Chile 269 (i852). 



Characters ; Closely related to the preceding genus but differing in having only a crest on the 

 pronotum rather than a stout horn and in having the tegmina strongly punctate on thebasal half and 

 hyaline on the apical half. The insects are small in size,slender and delicate in structure and inconspicu- 

 ous in appearance. Head slightly defiexed, subtriangular ; base arcuate and weakly sinuate; eyes 

 large and globular; ocelli prominent, about equidistant from each other and from the eyes and situated 

 on a line drawn through centers of eyes ; inferior margins of gena; sinuate ; clypeus extending for half its 

 length below inferior margins of genae and continuing the line made by these margins to give the trian- 

 gular outline to the face. Pronotum convex, elevated in a more or less pronounced crest: metopidium 

 swollen, triangular. projecting somewhat forwaid; median carina percurrent; humeral angles broad and 

 blunt; scutellum extirely exposed, unarmed, triangular, slightly longer than its width at base, base 



