BY THE REV. T. BLACKBURN. 
1393 
In general appearance very much like a Peryi^hus. Differs 
from all the species of Cycloihorax described above in having the 
punctured basal area of the prothorax on the general level of the 
segment instead of being depressed. 
Woodville, near Adelaide ; a single specimen. 
DYTISCID^. 
Cybister. 
C. GRANULATUS, Blackb. 
Since the publication of my description of this insect I have 
seen a short series of both sexes. The peculiar sculptiu’e of the 
elytra (which suggested the name) does not appear to be sexual, 
being quite as strong in the male as in the female, but it varies in 
both sexes, — some specimens showing it only feebly, — but it is 
always traceable. In the male the anterior tarsi are strongly 
transverse, the basal three joints together being considerably 
shorter than their width ; there is very little sexual pubescence 
on the intermediate tai’si, and the claws are rather strongly 
unequal. 
LAMELLICORNES. 
Bolboceras. 
B. Sloanei, sp.nov. 
Castaneum ; nitidum ; prothorace latera versus creberrime sub- 
tiliter rugulose, postice utrinque prope medium crebre crasse 
rugulose, in medio duplo (sparsius subtilissime et sparsim suli 
lineatirn crasse), punctulato ; elytris punctulato-striatis ; striis 
suturarn versus leviter, marginem lateralem versus fortiter, 
impressis ; pygidio crebre subtilius punctulato, dense hirsute ; til.uis 
anticis externe 6-dentatis, dente basali parvo. 
[Long. 10-11, lat. G^-7 lines. 
Maris capite cornu perlongo leviter recurve (exemplo typico 
prothoraci longitudine fere uiquali) instructo ; prothorace in medio 
fere ad basin late retuso ; parte retusa pernitida sparsim sul»- 
tilissirne pimctulata, utrin([ue in medio coruuta, postice curvatim 
antice rotundatim utrinque profunde excavata. 
