1926] 
New or Little Known Australasian Cicadas 
63 
lowing, of which the types were examined in the British Museum, 
while in some cases the genitalia of closely similar specimens were 
dissected. I owe hearty acknowledgements to the British Mu- 
seum authorities and especially to Mr. W. E. China for giving me 
all possible facilities. 
A very useful specific character in this group lies in the 
development of a shining boss like a Lecaniine Coccid (e. g. 
Saissetia) at the base of each operculum. This swelling is 
markedly different in texture and often in colour from the ad- 
jacent chitin. 
Melampsalta labyrinthica (Walk.) : the type is a female, but 
a male placed as conspecific by Distant had the Saissetia swelling 
distinctly marked. Australia. 
M. quadricincta (Walk.): the type is from King George’s 
Sound, S. W. Australia, and all truly conspecific examples are 
from Western Australia. The swelling at base of operculum is 
very conspicuous and well-developed. A series of specimens of 
somewhat larger size from Yallingup, W. Australia (R. E. Turner 
coll.) shows a slightly wider head but agrees in male genitalic 
structure and in opercular characters. 
M. sp.?: two males from W. Australia, arranged under 
quadricincta have the opercular swellings less distinct and are in 
other respects different, but cannot be described without com- 
parison with types in Australia. 
M. latorea (Walk.) : the type has the opercular swelling very 
distinctly developed. Most of the examples in the British Mu- 
seum are from W. Australia and the species is almost certainly 
synonymous with quadricincta from the same region, but the 
male genitalia must be dissected to establish this. 
M. waterhousei Dist. : the type has the opercular swelling 
il -developed. 
M. labyrinthica (Walk.): the type is a female but a male 
placed as conspecific has the opercular swelling distinctly marked. 
Australia. 
M. mackinlayi Dist. : the type is a female but a male placed 
as conspecific has no signs of the opercular swelling. Queensland. 
M. stradbrokensis Dist.: the type has indications of the 
opercular swelling but not very distinct. This species, from 
