Mr. W. W. Saunders’s Descriptions, &c. 197 
XXIX. Descriptions of the Chrysomelide of Australia, 
allied to the Genus Cryptocephalus. By W. W. Saun- 
DERS, Esq., F.L.S., &c.—continued from p. 154. 
[Read Ist April, 1844, &c.] 
In a paper on the Chrysomelide of Australia, allied to Crypto- 
cephalus, published in the last part of the Transactions of the 
Entomological Society, I pointed out that the sub-genera, which 
included the species I had under consideration, formed two divi- 
sions, distinguished by the lateral margins of the thorax being 
smooth in the first division, and dentalate or rough in the second 
division. 
Having described, in the paper above alluded to, the species of 
the first division, I shall now proceed to describe those of the 
second, which arrange themselves into three sub-genera, distin- 
guished as follows : 
Sreconp Drviston. 
(Lateral margins of the thorax dentate, or uneven.) 
§ filiform . . . . . . Prionopleura. 
subclavate . . . +« « Odontoderes. 
Antenne,short. . subclavate . . . . . Onchosoma. 
Antenne, long . 
PRIONOPLEURA (ptwy mAEvoa). 
Head vertical, immersed in the thorax up to the eyes. Lyes 
reniform, with a deep sinus. Antenne rather wide apart, inserted 
just in front of the sinus of the eye, as long or longer than the 
body; ¢, filiform, the six terminal joints somewhat more robust 
than the others, 11-jointed : first joint robust ; second small glo- 
bose; third and fifth longer than the remainder ; the six terminal 
nearly of equal length; @, shorter than body; third, fourth and 
fifth joints nearly equal, the remaining decreasing in size, and 
broader. Thorax subquadrate, rounded in front, with the lateral 
margins dentate or rugose, the upper surface rough, with elevated 
rounded points. Scutellum quadrate, elevated behind. Elytra as 
broad as or a little broader than the thorax, longer than broad, the 
upper surface rugose. Legs short, robust. Tarsi 4-jointed, the 
third joint deeply bifid, and thickly padded underneath. 
The type of this genus is the Cryptocephalus rugicollis, Gray. 
