i 4 HOMOPTERA 



SYNOPSIS OF GENERA 



) i . Metasternum with a moderately elevated transverse central plate, which is not 

 anteriorly angularly produced. 



A. Head [including eyes) about equal in "width to base of mesonotum ; eyes scarcely 



projecting beyond anterior angle of pronotum . 



a. Vertex of head at area of ocelli distinctly longer than front. 



b. Posterior angles of pronotum a little prominent, but not lobatelv 



produced. 



c. Tegmina with transverse vein at base of second apical area more or less 



vertical r. Genus Proarna. 



a'. Vertex of head at area of ocelli often only very slightly longer 

 than front. 

 - c'. Tegmina with transverse vein at base of second apical area 



strongly oblique 4. Genus Tympanoterpes. 



B. Head {including eyes) considerably broader than base of mesonotum ; eves 



projecting beyond anterior angles of pronotum. 



3, b'. Posterior angles of pronotum more or less lobately produced . 



d. Tympanal coverings large and only moderately internally deficient . 



e. Tegmina with transverse vein at base of second apical area more or less 

 vertical. 



i. Vertex of head at area of ocelli about as long as front 2. Genus Ollanta. 



— » f . Vertex of head at area of ocelli much longer than front . ... 3. Genus Pacarina. 

 d'. Tympanal coverings only developed on lateral areas. 

 e'. Tegmina with transverse vein at base of second apical area 



strongly oblique 5. Genus Ariasa. 



2. Metasternum transversely elevated and anteriorly angularly or subangtdarly 

 produced. 

 f"C. Head {including eyes) about as wide as base of mesonotum ; eyes not porrect . 6. Genus Fidicina. 

 D. Head {including eyes) considerably broader than base of mesonotum; eyes 

 porrect, more or less stylaie. 



,g. Pronotum about as long as mesonotum ; tympanal coverings in (f with 



their inner margins strongly concave 7. Genus Hemisciera. 



g'. Pronotum shorter than mesonotum ; tympanal coverings in 0* not 



concave interiorly 8. Genus Majeorona. 



66. Genus PROARNA, Stal 



Proarna. Stal, Stett. Ent. Zeit. Vol. 25, p. 61 (1864); Hem. Afr. Vol. 4, p. 7 (1866); Distant, Ann. 

 Mag. Nat. Hist. (7), Vol i5, p. 3n (igo5). 



Characters. — Head (including eyes) about equal in width to base of mesonotum, eyes scar- 

 cely projecting beyond anterior angles of pronotum, vertex of head at area of ocelli distinctly longer 

 than front; pronotum a little shorter than mesonotum. the posterior angles a little prominent but not 

 lobately produced; abdomen about as long as space between apex of head and base of cruciform eleva- 

 tion ; metasternum with a moderately elevated transverse central plate, which is not anteriorly angu- 



