1882.] MR. W. L. DISTANT ON UNDESCRIBED CICADIDZ. 133 
The tegmina of this species are bright green; but this is probably 
a variable character, as C. saundersii was originally described by 
Westwood as “ pallide lutea,” which perfectly agrees with the speci- 
mens in my own collection. Mr. Scott, however (Proc. Zool. Soc. 
1852, p. 16), states that this is not correct, but that the species is 
“‘leete viridis.” The fact evidently is that these two colours are 
common to the species, as is so frequently the case with others, and 
especially with Australian members of the family. 
ARCYSTASIA, ND. gen. 
Head, including eyes, slightly narrower than pronotum. Antennee 
with the first joints short but stout and prominent. Pronotum with 
the lateral margins slightly dilated and strongly depressed, the pos- 
terior angles strongly produced and rounded. Rostrum reaching 
the intermediate cox. Tegmina hyaline, much longer than abdo- 
men ; ulnar veins somewhat widely separated and divergent at base ; 
apical half of venation reticulated. Wings with the veins of the 
apical half numerous and slightly reticulated. Abdomen robust ; 
tympana detached. Opercula of male well developed, not quite reach- 
ing basal segment of abdomen. Anterior femora strongly spined. 
Metasternum with a central raised furrow. 
Allied to Cystosoma by the reticulated venation of the tegmina, 
but differing in the hyaline condition of the same and the non- 
dilated abdomen. Ihave placed it next the genus Acrilla, Stal, 
which has the tegmina shorter, rostrum longer, and the laterai 
thoracic margins not dilated. 
ARCYSTASIA GODEFFROYI, n. sp. (Plate VII. figs. 1, la, 16.) 
3. Body above dull testaceous and olivaceous. Head with the 
vertex dull testaceous, with a central fuscous longitudinal impression 
at base, the front dark obscure olivaceous, area of the ocelli with 
some slightly pitchy markings. Pronotum dull testaceous with 
the lateral margins ochraceous, and a central fuscous longitudinal 
impression, of which the margins and raised base are pale testaceous. 
Mesonotum olivaceous, with two central obovate testaceous spots, 
on each side of which is a sublateral, slightly curved black fascia, 
the margins of which are testaceous; cruciform basal elevation pale 
testaceous, with a small rounded fuscous spot on inner side of apices 
of anterior branches. Scutellum pale olivaceous. Abdomen testa- 
ceous, the basal segment olivaceous. Body beneath pale testaceous ; 
face, excluding margins, pale fuscous; sternum with olivaceous 
shadings. Legs olivaceous or testaceous; cox, trochanters, 
bases and apices of femora, and apices of tibize spotted with casta- 
neous. Tegmina and wings pale hyaline; the tegmina tinted with 
pale ochraceous, with the venation darker ochraceous. Wings with 
the veins ohraceous. 
The face is long and subdepressed, with a broad central suleation 
and faint transverse impressions. ‘The opercula are moderately large, 
but do not reach the base of the first abdominal segment, outer 
margins almost straight, posterior margins broad and slightly rounded, 
