MEMBRA CIDJE. 
27 
from the first to the third pairs. The hind tibiae are long, channelled, and 
show minute spurs at their extremities. 
DESCRIPTION OF PLATE B. 
Eig. 1. Diagrammatic view of the male parts of a Hemipterous insect, the general 
form and character of which may be traced in the genitalia of the Membracidse. 
Variations however are very common—( aa ) The lateral processes ; (bb) infra¬ 
lateral plates ; ( ss ) styles or claspers. 
Eig. 2. Profile but inverted diagrammatic view of the male parts—( ap ) Anal aperture 
at the end of the process ; (b) infra-lateral plates. The styles are retracted into 
the pygofer. 
Fig. 3. Underside of the pronotum of the female of Umbonia spinosa —( v ) The vulva 
at the extremity of the abdomen, which is within the cavity and covered by the 
pronotum ; ( a ) the anal opening ; ( p ) the posterior apex of the pronotum. 
Fig. 4. The male sexual organs of Centrotus leucaspis —( cp ) small caudal process 
composed of two joints, situated at the upper edge of the last abdominal ring; 
(ss) the hatchet-shaped styles with finely serrated backs ; (t) the theca or sheath, 
called post-penis by Fieber. 
Fig. 5. One of the same styles more magnified. 
Fig. 6. The theca more magnified, showing ducts in the concave part, probably 
connected with the penis. 
Fig. 7. Tegmen of Membracisfaveola, showing (c) the costal nervure or first radial 
nervure ; ( cb ) the cubitus or second radial nervure ; (r 3) the third radial; (/’4) the 
fourth radial; ( s ) the sutural nervure ; (l) (2) (3) (4) the apical cells ; (/) the limbus; 
(C)(D)(E) discoidal areas; (A) subcubital; (B) supra-marginal area; (F) costal area. 
Fig. 8. Wing of Membracis Jlaveola —1, 2, 3, 4, 5, apical areas ; (/) limbus. 
Fig. 9. Tegmen and wing of Polyylypta —(D) Basal area ; although in other species 
this area might be called discoidal. The apical cells are difficult strictly to decide 
as to their liomologues with other genera. They are here marked 1, 2, 3. 
Fig. 10. Tegmen and wing of Umbonia spinosa-— The lettering of the figure refers to 
similar nervures and areas as are marked in Figure 7 of this plate. 
Fig. 11. Tegmen of Heteronotus —(A) Subcubital area; 1 to 5, apical area; (s) suture. 
Fig. 12. Tegmen of Cyphonia —(A) Subcubital, with the apical areas following in 
order; an indistinct vein divides some of the areas, but it seems to be super¬ 
numerary. 
