Australian Phytophaga. 395 
the humeral callus; the first of these terminates at the 
commencement of the last fifth of the elytron, the second 
is slightly longer, and approaches somewhat nearer to 
the apex; in addition, on the hinder third, are four or 
five coarse longitudinal ridges. . 
The form of the thorax will separate the ¢ of the 
insect before us from the same sex of any of the hitherto 
known species. 
Lachnabothra Wilsont, Suffr., MS. 
Subquadrato-oblonga, nigro-picea, pilis argenteo-aureis 
adpressis vestita, tibiis basi antennisque obscure fulvis ; 
thorace dense argenteo-aureo sericeo; elytris profunde 
rugoso-punctatis ; prope marginem lateralem irregulari- 
ter verrucosis, castaneis, tuberculis plurimis oblongis 
magnis, nigro-piceis, nitidis, instructis. 
Mas. Thoracis disco utrinque tuberculo nitido in- 
structo; antennarum articulo ultimo penultimo paullo 
latiori, dimidio apicali nigro; femoribus modice incras- 
satis ; tarsorum anticorum articulo basali paullo ampliato, 
oblongo-ovato, apice truncato, 
Long. 2-24 lin. 
Hab.—South Australia, Gawlertown, Mr. Odewahn ; 
Adelaide, Messrs. Wilson and Waterhouse. 
Thorax as broad at its base as the elytra, sides rounded 
at the base, thence converging to the apex in the 4d, 
lateral margin slightly sinuate just before the middle; in 
the opposite sex the sides are rounded and diverging 
at the base, slightly flattened from thence to beyond the 
middle, then rounded and converging to the apex; disc 
irregularly pitted, but less distinctly so than in L. Hopet, 
densely clothed with pale metallic sericeous hairs, which 
radiate as usual from the centres of the various depres- 
sions ; disc in the ¢ elevated on either side of its middle 
into a distinct gibbosity, the apex of which is crowned 
with a shining tubercle; immediately behind each gib- 
bosity is an ill-defined transverse excavation, which runs 
inwards nearly to the medial line of the thorax, leaving 
the latter only in the form of a narrow longitudinal ridge ; 
elytra castaneous, coarsely and deeply rugose-punctate, 
irregularly verrucose near the lateral margin, covered 
with large shining, oblong, nigro-piceous tuberosities ; 
those on the anterior portion of the outer disc irregular. 
