230 
XI. ACANALONIIDAE. 
Acanonides Amyot and Serville (1843), Hemip., pp. LVIII, 520; type 
Acanalonia Spinola, Ann. Soc. Ent. Fra., VIII (1839), p. 447. 
This small family, which contains only five or six genera, was 
monographed by Melichar in 1902. It comes very close to some 
of the Issidae by which it appears to be separated by the absence 
of spines on the hind tibiae. 
The head is about as wide as the thorax and the clypeus lacks 
lateral carinae. The posterior margin of the pronotum is 
straight or but slightly concave, the pronotal carinae absent or 
obscure; the mesonotum is large. The tegmina are steeply tecti- 
form. This family differs from the Flatidae by having no 
costal area, or if there be one then it is obscure and has no 
transverse veins. 
The ovipositor is incomplete. The aedeagus is complex, the 
penis and periandrium appear to be amalgamated into a com- 
plex tube with appendages (figs. 30, 31), a condition found in 
some Issidae. 
Xl. aissmmaAr: 
Issites Spinola (1839), Ann. Soc. Ent. Fr., VIII, p. 204; type Issus 
Fabricius (1803), Syst. Rhyng., p. 99. 
This is a difficult family to characterize. With the exception 
of a few cases the head is as wide as the thorax, or wider. The 
hind margin of the pronotum is straight or but slightly concave 
or convex; the mesonotum is short, not more than twice the 
length of the pronotum, with a transverse carina across it par- 
allel to the hind margin of the pronotum, which divides it into 
two parts; the anterior portion is covered by the pronotum and 
is generally of a different sculpturing to the posterior portion. 
This character is also found in some Dictyopharidae and 
Lophopidae. 
The tegmen is without a costal area, or if one be present then 
it is small, obscure, and without cross-veins. The tegmen is 
often very short or very narrow and the venation obscured. 
The legs are generally thick and the hind basitarsus short and 
thick. 
The ovipositor is incomplete. The male genitalia are consid- 
erably diverse, even in the few species that I have examined. 
