i32 HOMOPTERA 



quadrate, wider than long and very roughly sculptined; base feeblj' arcuate; eyes globular; ocelli large, 

 prominent, located on elevated tubercles, a little nearer to each other than to the eyes and situated about 

 on a line drawn through centers of eyes ; inferior margins of genae sinuate; clypeus hghtly trilobed and 

 extending for more than half its length below inferior margins of geiiae. Pronotum convex, strongly 

 constricted in middle to form an anterior and a posterior dorsal sweUing; the anterior portion is hood- 

 like with a deep impression above the humeral angles and above the head; metopidium sloping; humeral 

 angles strong, triangular; no suprahumeral horns; posterior half of pronotum greatly swollen and ending 

 in a single, short, sharp spine. Tegmina entirely free; corium fully exposed ; cells irregular in shape; 

 veins strong; fiveapical and three discoidal cells; median apical cell petiolate; first apical cell extending 

 down the costal margin ; apical Hmbus broad. Legs simple ; hind tarsi longest. 



Type dipteroides Fowler. 



Geographical distribution : According to the described species, this genus rangesfrom north- 

 erii South America through Central America and Mexico to the western part of the United States, but 

 the species must be quite rare as the}- are seldom seen in collections and have been mentioned only a few 

 times in the literature of the famil}'. 



1. binodosa Goding, Trans. Amer. Ent. Soc. LII : io8 (1926). Ecuador. 



2. dipteroides Fowler, B. C. A. II : 102. i (iSgS). — Pl. 7, fig. 88. Guatemala. 



3. hispida Van Duzee, Trans. So. Dak. Soc. Nat. Hist. II : i. 49 (1914). California. 



4. ornata Plummer, Memb. Mex. 377 (ig^S). Mexico. 



103. genus MELUSINA STAL 



Melusina Stal, Bid. Hem. Syst. 552 (1867). 



Characters : Very near the foUowing genus, Stidocephala, but with the dorsum low and convex 

 and with a deep semicircular impression on each side of the pronotum. Head subquadrate, wider than 

 long, roughly sculptured, apex triangular; base arcuate; eyes globular and protruding; ocelli conspic- 

 uous, slightly elevated, much nearer to each other than to the eyes and situated on a line drawn 

 through centers of eyes ; inferior margins of genae rounded; clypeus convex, extending for half its 

 length below inferior margins of genae. Pronotum low and convex, highest in front; no suprahumerals; 

 metopidium vertical, wider than high; humeral angles strong, triangular, blunt ; median carina very 

 faint; sides of pronotum with a deep semicircular impression above margins; posterior process long, 

 slender, acuminate, extending beyond internal angles of tegmina but not reaching theirtips. Tegmina 

 hyaline with five apical and three discoidal cells ; apical limbus broad. Legs simple; hind tarsi inuch 

 longer than the others. 



Type nervosa Fairmaire. 



Geographical distribution : A South American genus represented by the foUowing four 

 species : 



1. exaltata Fabricius, Syst. Rhyng. 10. 22 (i8o3). Brazil. 



2. nervosa Fairmaire, Rev. Memb. 289. 22 (1846). Brazil. 



3. nigriveniris Funkhouser, Journ. N. Y. Ent. Soc. XXVII : 4. 272 Ecuador, Colombia. 



(1919). -Pl. 7, fig. 89. 



4. rugifrons Berg. Ann. Soc. Cien. .Arg. XVI : 288 (i883). Argentina. 



