1882.] MR, W. L. DISTANT ON UNDESCRIBED CICADID&. 125 
5. On some undescribed Cicadide from the Australian and 
Pacific Regions. By W. L. Distant. 
[Received January 13, 1882.] 
(Plate VII.) 
The species here described are almost wholly from the Museum 
Godeffroy at Hamburg, the Rhynchotal collection of which I have 
been requested to determine by Mr. Schmeltz. 
Australia is particularly rich in Cicadide ; and from what little is 
known at present it probably possesses the greatest number of that 
family compared with any other region of the globe. Cyclochila, Psal- 
toda, Henicopsaltria, Thopha, Cystosoma, and Chlorocysta are genera 
remarkable in structure, some extremely limited and none numerous in 
species and, so far as our present knowledge extends, completely con- 
fined to Australia ; whilst the genus Melampsalta, though not alto- 
gether confined to that continent, is yet even now known to comprise 
a greater number of Australian species than can be found belonging 
to a genus in any other fauna. - Two genera, Cicada and Tibicen, 
have almost a world-wide range, or are at least found in all the 
zoological regions. 
If we compare the distribution of the Australian Cicadidee with 
the geographical features of the botany of the same region, coinci- 
dences at once appear. Many affinities, as has been so ably pointed 
out by Dr. Hooker, exist between the South-African and Australian 
floras ; and genera are found common to these two regions which are 
found nowhere else. One very striking and parallel case may be 
mentioned in the Cicadide. The Australian genus Cystosoma is 
strikingly dissimilar to the usual generic type in having a wonder- 
fully inflated and dilated abdomen: in South Africa we find in this 
respect an analogous genus in Pydna, The extraordinary multiplicity 
of Australian species in the genus Melampsalta reflects the abund- 
ance of species in the genus Acacia as found in the same region. 
In the specific nomenclature I have largely used the names of 
Australian explorers, qualitative terms being an impossibility to 
provide for these insects, and more likely to obscure than to eluci- 
date their differences. 
CosMOPSALTRIA STUARTI, nl. sp. (Plate VII. figs. 2, 2a, 26.) 
Body above pale greenish, sparingly pilose. Head with a spot on 
each lateral margin, and a smaller and rounded spot on each side of 
the ocelli, black; ocelli red margined with black ; eyes dull ochraceous. 
Pronotum with two narrow, central, longitudinal fuscous fascize, some- 
what faint and obliterated about centre, more widely divergent on 
anterior margin, and joined together on the posterior margin ; oblique 
strize behind eyes, and a spot on anterior inner border of lateral mar- 
gin, also fuscous. Mesonotum with two central obconical spots mar- 
