Sub-Genera of Australasian Chrysomelide. 295 
fifth joint having a deep rounded excavation in the centre near the 
anus on the underside. Legs short, robust. Tarsi 4-jointed ; 
third joint broad and deeply bifid (fig. 5c). 
The short, robust, broadly ovate shape, joined with the remark- 
ably elevated scutellum and singularly sculptured thorax, dis- 
tinguish this subgenus from all its allies that I am acquainted with. 
It would appear in some respects to approach Onchosoma, a sub- 
genus I have already described in the Entomological Society’s 
Transactions, but it is evidently distinct and a very remarkable 
form. 
Lachnabothra Hope, W. W. 8. (Pl. XV. fig. 5.) 
Dull chesnut brown. Antenne and parts of the mouth yellow 
brown. Eyes black. Head rugose, covered with irregularly laid 
adpressed yellow white hairs. Thorax with about eighteen exca- 
vations or pits on the upper surface, densely clothed with soft 
down-like whitish hairs, which radiate from the centres of the 
excavations, giving the whole a peculiar silky appearance. Scu- 
tellum with an elevated longitudinal ridge along the centre, clothed 
with adpressed whitish hairs, except at the apex. Elytra rugose, 
with elongate rounded elevations and deep impressions, sparingly 
covered with yellowish-white short hairs. Abdomen underneath 
punctured and sparingly clothed with yellowish-white adpressed 
hairs. Legs rufous brown, with the tarsi paler. 
Length -23, inch., breadth +4, inch. 
From New South Wales. 
In the Cabinet of the Rev. F. W. Hope, after whom I have 
named the species. 
