29 
abbreviata) ornatis; subtus piceo-ferrugineus, pedibus anticis 
concoloribus, posterioribus 4 paullo dilutioribus; supra fere 
levis obsolete rugatus, rugis in capite prothoraceque confusis 
in elytris longitudinaliter dispositis, in elytrorum parte 
externa paullo magis distinctis substriiformibus; elytris in 
parte mediana magis quam latera versus convexis, parte 
cupreo-aurea leviter subimpressa, apicibus singulatim rotun- 
datis. Long., 6; lat., 4 1. (vix). 
Easily distinguishable from all the previously described Aus- 
tralian Gyrinide by its great width, its length being scarcely 
more than half again its breadth. 
Victoria. 
HY DROPHILIDE. 
PHILHYDRUS. 
P. eyrensis, sp. nov. Ovalis; nitidus ; piceo-niger, palpis anten- 
nis tibiis tarsis et capitis prothoracis elytrorumque margini- 
bus lateralibus rufis vel rufo-testaceis ; supra sat equaliter 
crebre sat fortiter (elytris quam caput prothoraxque paullo 
magis fortiter) punctulatus ; elytris puncturis nonnullis (his 
seriatim dispositis) vix majoribus impressis. Long., 23 1. ; 
lat., 141. 
This species is extremely like P. melanocephalus, Fab., and is 
probably the insect on the authority of which P. melanocephalus 
has been credited (I believe it is in Dejean’s Cat.) to Australia. 
But it differs from melanocephalus in its head not being impressed 
in front of the eyes, in the evidently less strong puncturation of 
its prothorax and in its palpi being scarcely infuscate at the 
extreme apex. 
Hyre’s Peninsula. 
HYDROCHUS. 
H. Palmerstoni, sp. nov. Minus elongatus ; sat nitidus ; viridis, 
elytris brunneis, cupreo-submicantibus ; antennis_ palpis 
pedibusque sordide testaceis, genubus infuscatis ; capite inter 
oculos longitudinaliter 3-sulcato; prothorace cordato sat 
crebre ruguloso-punctulato, indisco minus perspicue 3-areo- 
lato ; elytris seriatim punctulatis, puncturis basin versus sat 
parvis postice permagnis foveiformibus. Long., 13, L; 
lat., 2 1. 
A remarkable species on account of the peculiar sculpture of 
its elytra, the seriate punctures being in the basal one-fourth 
comparatively small and the interstices between the series con- 
tinuous and well defined, while before the middle the seriate 
punctures become extremely large round fovez of diameter greater 
than the width of a puncture and an interstice together in the 
