120 HOMOPTERA 



2. intermedia Fowler, Trans. Ent. Soc. Lond. 421 (1894). Ecuador. 



3. mixta Stal, Bid. Memb. Kan. 2^9. 3 (1869). Colombia. 



4. parvula Fabricius, Syst. Rhyng. 32. 22 (i8o3). South America. 



5. subcristata Stal, Bid. Memb. Kan. 238. 2 (1869). Colombia. 



6. viridula Fairmaire, Rev. Memb. 3o5. i3 (1846). — Pl. 6, fig. 7 6. Colombia. 



89. Genus HILLE STAL 



Hille Stal, Bid. Hem. Syst. 555 (1867). 



Characters : This genus is in considerable confusion due to the difficulty of delimiting it from 

 F^airmaire 's old genus Oxygouia (now Gelastogonia) in which a number of its species were originally 

 placed. Goding (1929) has suggested that the difference in the structure of the dorsal crest is a sufficient 

 character upon which to distinguish the two genera and from material which we have been able to study, 

 this seems satisfactory. On this basis, the characters of Hille may be given as follows : Medium sized 

 insects of triangular shape as seen from the side, with dorsal horn arising from behind the humeral angles, 

 the margins of this horn being declivous or sloping, the posterior apex of the pronotum long, sharp and 

 reaching the tips of the tegmina, and the tegmina about half exposed. Head broadly triangular; base 

 arcuate and strongly sinuate ; eyes globular and protruding; ocelli conspicuous, 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 straight ; clypeus extending for half its length below inferior margins of genae and continuing. with 

 its lateral edges, the facial line made bj' the margins of the genae. Pronotum elevated, convex, with a 

 single strong, sharp dorsal horn arising from behind the line of the humeral angles, the posterior mar- 

 gin of the horn declivous or sloping, never rounded or showing a distinct step; metopidium convex, 

 wider than high; hnmeral angles well produced into large, flat, auriculate, blunt, triangular processes 

 which project laterad and are flattened dorso-ventrally ; median carina strongly percurrent; sides of 

 pronotum bearing strong longitudinal ridges; posterior apex of pronotum gradually acuminate and reach- 

 ing just about to the tips of the tegmina. Tegmina about half exposed ; basal half strongly and densely 

 punctate, apical half hyaline; five apical cells; one discoidal cell ; median apical cell peliolate; apical 

 limbus broad. Legs simple, subcyhndrical ; hind tarsi slightl}' longer than the others. 



Type maculicornis F^airmaire. 



Geographical distribution : The following species of this genus, if they have been correctly 

 assigned, are very abundant throughout wide areas in South and Central America. 



1. conica Fairmaire, Rev. Memb. 3o2. 3 (1846). Colombia, Brazil, Venezuela. 



reticulata Wallfer, List Hom. R. M. 523. i5 (i85i). 

 fiutaiis Stal, Bid. Memb. Kan. 236. 5 (1869). 

 sulphuria Butler, Cist. Ent. II : 2c6. 7 (1877'!. 

 acuminata Buckton, Mon. Memb. 187 (i9o3). 



2. dorsalis Fairmaire, Rev. .Memb. 3o3. 5(1846). Colombia, Ecuador, BraziL 



venosa Walker, Lis-t Hom. B. M. 523. 14 (i85i). 

 coiispersa Stal, Bid. Memb. Kan. 236. 3 (1869). 

 ttotata Buckton. Mon. Memb. 220. 36 (1903). 



3. ecuadoreiisis Fowler, Trans. Ent. Soc. Lond. 420 (1894). Ecuador. 



4. herbicola Haviland, Zoologica VI : 3. 255 (1925). British Guiana. 



5. mactdicovnis Fairmaire, Rev. Memb. 3o3. 6 (1846). Colombia. 



6. pacifica Faiimaire, Rev. Memb. 3o2. 4(1846). Brazil, Panama, Guatemala. 



