228 
The Cenchreini are the most generalized tribe, and such 
genera as ’ekunta approach the Cixiidae very closely. In the 
genus Symidia we have an approach toward the Zoraidinae and 
in the genus Phaciocephalus toward the Otiocerini. 
So far no fossil forms have been recognized. The present 
distribution is over the entire tropics in forest country, with a 
few straying into temperate regions. he Zoraidinae and the 
Rhotanini are only known from the Eastern Hemisphere, while 
the two genera Derbe and Mysidia are confined to the Western 
Hemisphere. 
The aedeagus is quite typical of the family and can be recog- 
nized from all other fulgorids. The pygofer and anal segment 
are normal; the latter is often large and produced into one or 
two spines at the apex; the former is generally produced into 
the middle of the ventral margin. The genital styles vary in 
size and shape, their apodemes are fairly large and free from 
all connection (except muscular) with the aedeagus, and thus 
differ from most other fulgorids. The aedeagus is long, sub- 
tubular, slender, and curved upward, with a complex structure 
at the apex; the base is in contact with the base of the anal seg- 
ment and has a large surface connection with the body mem- 
brane. The curved basal section I am inclined to regard as the 
periandrium (fig. 28, pa.) and the apical section as the penis. 
Under this interpretation there is no apodeme of the penis, but 
only a small, strong apodeme on the base of the periandrium 
for the attachment of muscles. This type of genitalia, with slight 
modification among the Zoraidini, is found all through the 
family. The genus /’enata Distant has this type of genitalia and 
must be included in the family. 
VI. ACHILIXIIDAE. 
Type Achilixius Muir. Philippine Jour. Sci., 22 (5) (1923), p. 483. 
This family is easily recognized by the two processes on each 
side of the base of the abdomen, the anterior larger than the pos- 
terior. ‘The larger bears two hemispheroidal depressions and the 
smaller bears one. There is a somewhat similar appendage at the 
base of the abdomen in the genera Benna and Bennaria of the 
Cixiidae. The posterior margins of the tegmina beyond the clavus 
are not produced and do not overlap when at rest, the tegmina 
