464 Mr. F. P. Pascoe on some new or little-known 
Helceus castor. 
H. late ovatus, fusco-brunneus, vix nitidus, setuliferus, marginibus latis, 
explanatis; prothorace angulis posticis productis, incurvis; elytris 
sutura elevata, utroque costa valida usque ad partem tertiam percur- 
rente. 
Hab, South Australia. 
Broadly ovate, brownish, scarcely shining, margins of the prothorax 
and elytra broad, and only slightly reflexed, the edges with an erect, 
narrow border; antennee nearly linear; prothorax with short, scattered 
bristly hairs, the perforated portion with an elevated margin, disk with 
a sharp longitudinal line, posterior angles faleate, overlapping the elytra; 
scutellum broadly triangular; elytra irregularly punctured, and clothed 
with numerous scattered minute bristles, costa on each side the suture 
terminating at about a third from the apex ; body beneath dark brown ; 
legs rugose. Leneth 9 lines. 
A broad, stout species, the sides of the elytra within the margins 
more vertical and elevated than in any other. 
Helcus falcatus. 
H, ovatus, niger; prothorace marginibus anticis in processum acute fal- 
catum terminatis; elytris lividis, sparse setuliferis, in utroque costa 
crenata usque ad tertiam partem percurrente, 
Hab, Kangaroo Island. 
Ditters from H. Peronit, Bois., in the following particulars :—antennze 
narrower, much less dilated at the apex; prothorax obsoletely granu- 
lous, its anterior processes gradually narrower to the point, or, in other 
words, completely falcate, not of equal width until near the point, and 
not hollowed out above ; elytra very glossy, as if varnished, their surface 
very slightly punctured and with scattered curved bristly hairs, and 
the lateral costa more decidedly crenate. Length 5-6 lines. 
Symperes [ Heleeine ]. 
Characteres ut in Helco, sed caput liberum, anguli antici prothoracis 
haud producti. Labrwm obtectum. 
The form of the prothorax will not allow the species described 
below being placed in Helwus; and the declivous mesosternum with- 
out any notch for the reception of the prosternal process, independ- 
ently of other characters, separate it from Saragus. It is quite an 
Helcus in habit. I received my specimen from Mr. MacLeay; and it 
is the only one I have seen. A second species has been described 
by Mr. White, under the name of Encephalus tricostellus (App. to 
Gray’s Voyage, p. 461). 
