AND SPECIES OP QALERUCTNA3. 
163 
portion by a sutural line, its surface transversely concave ; 
antennae filiform (the five upper joints in the solitary specimen 
under examination broken off). Thorax scarcely broader than 
long; sides slightly diverging and slightly sinuate from the base 
to beyond the middle, thence rounded and converging towards 
the apex; upper surface convex, smooth, impunctate, hinder 
disk impressed on each side with a large shallow fovea. Elytra 
parallel, subcylindrical ; each with eight or nine slightly elevated 
costse, the interspaces distinctly punctured. 
The peculiar formation of the clypeus in this species closely 
resembles that of the same segment in Cheiloxena. As the pecu- 
liarity in the present instance is, however, probably only sexual, 
the removal of the insect from the genus in which I have placed 
it will not be justified until the other sex is known. 
Genus Monodepta, Erichson, 
This natural group, founded by Erichson in 1843 on an African 
species, M. pauperata, has been subsequently divided by Chapuis, 
myself, and others into smaller generic groups, on characters 
derived chiefly from the open or closed state of the anterior 
acetabuia and on the length of the epipleurse. I have already 
stated my reasons for considering the first of these characters to 
be in a great measure unsatisfactory, and at any rate one not to 
be depended on by which to divide the Galerucince into primary 
sections. In Monolepta (taken as a whole) the lateral angles of 
the subbasal lobe of the prosternum are well developed, and in 
the great majority of species join the apices of the epimera to 
close the anterior acetabuia; in some instances, however ( Lupe - 
rocles alboplagiatus, Ac.), the epimera are abbreviated before 
reaching the sides of the lobe, and consequently the acetabuia 
remain distinctly open ; in a third set ( Ochralea ) the acetabuia 
are found to be both closed and widely open in the same species, 
every intermediate stage occurring between the two extremes *. 
The second, of great value when well defined and when really 
terminating at a given point, as in Aula cop Jior a and other genera, 
* In Luperodes prmustus and L. disc repens, two insects which differ from the rest 
•of the genus in their oblong, not ovate form, the sides of the subbasal lobe are 
not produced, the lobe itself being either narrowly wedge-shaped or noduliform ; 
the epimera are also much abbreviated, leaving the acetabuia broadly open. 
These species should, I think, be retained in Luperodes. 
