RHYNCHOTA. 
569 
petiolate ; "wings "with 4 apical cells j tibiae simple. Sp. Centrotus phantasma 
(Sign.), C. validicornis (StB,l) j X. geniculatuSj sp. n., StSl, 1. c. p. 92, Sierra 
Leone. 
Centruchus, g. n., StSl, 1. c. p. 93. Allied to Centrotus ; wings with 4 apical 
cells j tegmina with 5 apical and 2 discoidal cells, inner 2 veins of corium 
not joined before the middle by a transverse vein. Sp. Centrotus fuseipennis 
(Germ.). 
Sertorius, g. n., St§,l, /. c. p. 88. Allied to Centruchus ; 2 interior longitu- 
dinal veins of corium united by a transverse venule before the middle. Sp. 
Centrotus australis (Fairm.), B. e. Z. 1860, p. 387. 
PlatyheluSj g. n., StS,l, 1. c. p. 96. Allied to Centrotus ; prothoracic lateral 
horns long, directed upwards, compressed and widened, and curved outwards 
towards apex, which is acuminate; posterior process distant from body. 
Sp. Centrotus Jlavus, vicinus, proximus (Sign.), nodicornis (Germ.), sene- 
galensis (Fairm.), hilineatus (Stal). 
Ennga, g. n., Stal, Berl. ent. Zeits. 1866, p. 387. Allied to Oxygonia ; pro- 
thorax produced to apex of tegmina, acuminate, convex and very declivous 
in front, suddenly compressed and elevated behind lateral angles ; tegmina 
with no discoidal cell, 6 apical cells, the middle one petiolate. Sp. O. pad- 
jica and chrysura (Fairm.), O. sohrina (StRl). 
Puhlilia, g. n., StSl, 1. c. p. 387. Allied to preceding ; prothorax convex, 
produced as far as apex of tegmina, compressed, acuminate, declivous in 
front, keeled throughout, back slightly sinuated ; tegmina with 1 discoidal 
and 6 apical cells, the middle one petiolate. Sp. Entylia concava (Say). 
Potnia, g. n., St§,l, 1. c. p. 388. Allied to Triquetra ; thorax with the back 
convex, furnished with a porrected horn in front, lateral angles not produced, 
Sp. Umhonia venosa (Germ.) and U, indicator (Fairm.). 
, CiCADELLINA. 
The species of this group are referred by Stal (Hem. Afr. iv.), 
with the Membracidoif to 3 great families, Cercopida and Jassiday 
the latter including the MembracideB (see p. 567). In the Cerco- 
pida Stal {1. c. p. 55) establishes 3 subfamilies, characterized as 
follows : — 
I. Anterior margin of thorax straight j eyes of equal length and breadth. 
Cercopida. 
II. Anterior margin of thorax roimdod or angulated j eyes usually trans- 
verse. 
A. Scutellura flat, triangular Aphrophorida, 
B. Sciitellum much elevated, compressed behind, armed with a long 
apical spine Mach^erotida. 
Of the first and second subfamilies Stal tabulates numerous genera. Tri- 
ecphora, Monecphora, Sphenorhina (A.& S.) are combined with Tomaspis 
(A. & S.) and again divided into several genera ; Ptyelus natalensis, Stal, is 
substituted for rotmidatus (^\gn..)=^costalis and nodosus (Walk.), and Carystus 
hyalinopterus for Ptyelus hyalinipennis (Stal). 
The table of subfamilies of Jassida (1. c. pp. 82-83) has been given under 
Membraddce. The subfamily Jassida is divided into numerous genera, many 
of which are characterized as new. Epiclines (A. & S.) = Proi'anus (Spin.) ; 
